Hi Tom,
Thank you for posting a nice summary of your progress, but there is something wrong here.
Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).
I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.
Later today I could post some pictures from my broken CRT collection.
Pin 10 connects to the metal can the expansion mesh dome sits on.
tom jobe...
PS Maybe look at your -10 CRT and see where pin 12 goes internally?
I don't have a broken -10 CRT to look at.

I used the same military manual from Bama.

I had two reasons not to suggest that the tunnel diodes are the
problem:

1. The common failure point for the symptoms does not implicate the
tunnel diode part of the trigger circuit. External triggering and I
would assume line triggering both work and neither of them go through
U370 which could cause all of the problems.

2. The tunnel diodes are fragile and difficult to replace so fiddling
with them if they are not definitely the problem is asking for
trouble. :)

On Sat, 26 Jan 2013 23:56:53 -0000, "stan_katz"
wrote:

Hello Tom,

I will gladly avoid touching the tunnel diodes, and will start with David's suggestion. The only service manuals I have are from BAMA, which are the Army TM--- model manuals. Will these do, or can you point me in a better direction? BTW, Bert's post is a warning to me that the 475 has potentially unobtanium parts. Right now, Tucker has Tek tunnel diode kits for sale. Can you, or Bert, post the proper kit part number for my scope? I should buy a kit now if it's one of those listed at Tucker. Tom, I noticed my thanks for your input on my 3325 repair effort got cut. Let me thank you here.

Stan

--- In TekScopes@..., "Tom Miller" wrote:

If you do work on the tunnel diodes, be sure to use a heat sink right up against the diode body. Ge tunnel diodes are easily ruined with heat.

However, I think David's comments are more likely the issue. That is because of the external trigger working.

Do you have the correct service manual for your 475?

Regards,
tom

----- Original Message -----
From: Bert Haskins
To: TekScopes@...
Sent: Friday, January 25, 2013 5:09 PM
Subject: Re: [TekScopes] 475 Triggering Issue -- Will recent 468 Triggering Issue Thread Help Me?

On 01/25/2013 03:46 PM, stan_katz wrote:

I have an ancient 475 scope which works fine with an external trigger, but will not trigger on any of the internal sources. Should I start by reviewing the recent 468 triggering issue thread to get me going? If not, can anyone recommend a thread I should start with? Of course, I'd be delighted to receive help on this thread.

Stan

Probably not.
Going from what I had on 465Bs the triggering problem is often that
the tunnel diodes have changed in value.
There are many! threads about this in the archives.
It may be worth your time to try swapping the TDs from the B sweep section
with the A section to see if things change.
I had this problem come up when I was hunting for a process control network
problem while working in factory in a different country.
I swapped the TDs and the scope has been near perfect ever since.
Go figure.

----- Original Message -----

From: chipbee40

To: TekScopes@...

Sent: Sunday, January 27, 2013 1:22 PM

Subject: [TekScopes] Re: Need part 2232 CRT and source for a tube - update

?

Interesting, When you swapped the tube on the 2232 did you have the 2 flying 4pin leads connected to the top board? If they are unconnected the display is all over the place. JC

--- In TekScopes@..., "Tom Miller" wrote:
>
> Then why, when I installed the -00 tube into the 2232 scope with no connection the pin 12, the display was completely unstable when the beam moved around. The image size varied depending on where the beam was and with focus changes. Very indicative of a floating element in the tube, When I installed the diode, capacitor, and resistor on the board just like in the 2215A and connected pin 12 to the -100 volts, everything worked fine.
>
> I was thinking about connecting an external PS to the pin 12 and seeing what effect varying the voltage on the mesh would have but I tired of working on it. Maybe I'll go back and play with it. I'll also take a look at Sphere's comments.
>
> Thanks for your thoughts guys,
> Tom
>
>
>
> ----- Original Message -----
> From: chipbee40
> To: TekScopes@...
> Sent: Sunday, January 27, 2013 12:59 PM
> Subject: [TekScopes] Re: Need part 2232 CRT and source for a tube - update
>
>
>
>
>
> I second Tom on this, the only difference between the -10 version is a longer HT lead due to the updated multiplier having a built in socket instead of a flying lead. I do have duff versions of both tube and neither have the pin 12 connected. In the -00 as Tom says there is an unattached 3cm wire, In the -10 the pin is used as a support for one of the glass rods, no other connection. I've seen 2230's and 32's of all flavors with both versions of tube interchanged, the only way you can't do it is if the scope has the updated multiplier (requires a longer HT lead) and even then I've seen the HT leads modified. The missing components referred to do allow the use of a 465 CRT See about half way down the page. JC
>
> --- In TekScopes@..., "Tom Jobe" wrote:
> >
> > Hi Tom,
> > Thank you for posting a nice summary of your progress, but there is something wrong here.
> > Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).
> > I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.
> > Later today I could post some pictures from my broken CRT collection.
> > Pin 10 connects to the metal can the expansion mesh dome sits on.
> > tom jobe...
> > PS Maybe look at your -10 CRT and see where pin 12 goes internally?
> > I don't have a broken -10 CRT to look at.
> >
> >
> >
> > ----- Original Message -----
> > From: Tom Miller
> > To: TekScopes@...
> > Sent: Saturday, January 26, 2013 10:22 AM
> > Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update
> >
> >
> >
> >
> > This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.
> >
> > I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.
> >
> > The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.
> >
> > Good luck and email to the list if any problems.
> >
> > As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)
> >
> > Regards,
> > Tom
> >
> >
> >
> > ----- Original Message -----
> > From: Tom Miller
> > To: TekScopes@...
> > Sent: Tuesday, January 22, 2013 9:01 PM
> > Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
> >
> >
> >
> >
> > Hi Tom,
> >
> > That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A. The HV multiplier has a short flexible lead and connector..
> >
> > I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.
> >
> > Anyway, off to the archives.
> >
> > Thanks,
> > Tom
> >
> >
> > ----- Original Message -----
> > From: Tom Jobe
> > To: TekScopes@...
> > Sent: Tuesday, January 22, 2013 8:23 PM
> > Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
> >
> >
> >
> >
> > Hi Tom,
> > I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion about the later "dash 10" version of the 2232 CRT.
> > I do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).
> > tom jobe...
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Tom Miller
> > To: TekScopes@...
> > Sent: Tuesday, January 22, 2013 5:01 PM
> > Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]
> >
> >
> >
> >
> > It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.
> >
> > Next question,
> >
> > Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.
> >
> > I need to find a junker 2232 with a good tube.
> >
> >
> > Regards,
> > Tom
> >
> >
> > ----- Original Message -----
> > From: Tom Miller
> > To: TekScopes@...
> > Sent: Friday, January 18, 2013 9:48 PM
> > Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
> >
> >
> >
> >
> >
> > Looks like the same tube is used in the following scopes:
> > 2213A, 2215A, 2220, 2230, 2235, 2235L, 2236
> >
> >
> > Tom
> >
> > ----- Original Message -----
> > From: Tom Miller
> > To: TekScopes@...
> > Sent: Friday, January 18, 2013 9:34 PM
> > Subject: [TekScopes] Need part 2232 CRT and source for a tube
> >
> >
> >
> >
> > I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.
> >
> > Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10
> >
> >
> > Regards,
> > Tom
> >
>

----- Original Message -----

From: chipbee40

To: TekScopes@...

Sent: Sunday, January 27, 2013 12:59 PM

Subject: [TekScopes] Re: Need part 2232 CRT and source for a tube - update

?

I second Tom on this, the only difference between the -10 version is a longer HT lead due to the updated multiplier having a built in socket instead of a flying lead. I do have duff versions of both tube and neither have the pin 12 connected. In the -00 as Tom says there is an unattached 3cm wire, In the -10 the pin is used as a support for one of the glass rods, no other connection. I've seen 2230's and 32's of all flavors with both versions of tube interchanged, the only way you can't do it is if the scope has the updated multiplier (requires a longer HT lead) and even then I've seen the HT leads modified. The missing components referred to do allow the use of a 465 CRT See about half way down the page. JC

--- In TekScopes@..., "Tom Jobe" wrote:
>
> Hi Tom,
> Thank you for posting a nice summary of your progress, but there is something wrong here.
> Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).
> I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.
> Later today I could post some pictures from my broken CRT collection.
> Pin 10 connects to the metal can the expansion mesh dome sits on.
> tom jobe...
> PS Maybe look at your -10 CRT and see where pin 12 goes internally?
> I don't have a broken -10 CRT to look at.
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Saturday, January 26, 2013 10:22 AM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update
>
>
>
>
> This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.
>
> I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.
>
> The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.
>
> Good luck and email to the list if any problems.
>
> As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)
>
> Regards,
> Tom
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 9:01 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> Hi Tom,
>
> That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A. The HV multiplier has a short flexible lead and connector..
>
> I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.
>
> Anyway, off to the archives.
>
> Thanks,
> Tom
>
>
> ----- Original Message -----
> From: Tom Jobe
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 8:23 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> Hi Tom,
> I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion about the later "dash 10" version of the 2232 CRT.
> I do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).
> tom jobe...
>
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 5:01 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]
>
>
>
>
> It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.
>
> Next question,
>
> Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.
>
> I need to find a junker 2232 with a good tube.
>
>
> Regards,
> Tom
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Friday, January 18, 2013 9:48 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
>
> Looks like the same tube is used in the following scopes:
> 2213A, 2215A, 2220, 2230, 2235, 2235L, 2236
>
>
> Tom
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Friday, January 18, 2013 9:34 PM
> Subject: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.
>
> Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10
>
>
> Regards,
> Tom
>

Then why, when I installed the -00 tube into the 2232 scope with no connection the pin 12, the display was completely unstable when the beam moved around. The image size varied depending on where the beam was and with focus changes. Very indicative of a floating element in the tube, When I installed the diode, capacitor, and resistor on the board just like in the 2215A and connected pin 12 to the -100 volts, everything worked fine.

I was thinking about connecting an external PS to the pin 12 and seeing what effect varying the voltage on the mesh would have but I tired of working on it. Maybe I'll go back and play with it. I'll also take a look at Sphere's comments.

Thanks for your thoughts guys,
Tom



----- Original Message -----
From: chipbee40
To: TekScopes@...
Sent: Sunday, January 27, 2013 12:59 PM
Subject: [TekScopes] Re: Need part 2232 CRT and source for a tube - update





I second Tom on this, the only difference between the -10 version is a longer HT lead due to the updated multiplier having a built in socket instead of a flying lead. I do have duff versions of both tube and neither have the pin 12 connected. In the -00 as Tom says there is an unattached 3cm wire, In the -10 the pin is used as a support for one of the glass rods, no other connection. I've seen 2230's and 32's of all flavors with both versions of tube interchanged, the only way you can't do it is if the scope has the updated multiplier (requires a longer HT lead) and even then I've seen the HT leads modified. The missing components referred to do allow the use of a 465 CRT See about half way down the page. JC

--- In TekScopes@..., "Tom Jobe" wrote:
>
> Hi Tom,
> Thank you for posting a nice summary of your progress, but there is something wrong here.
> Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).
> I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.
> Later today I could post some pictures from my broken CRT collection.
> Pin 10 connects to the metal can the expansion mesh dome sits on.
> tom jobe...
> PS Maybe look at your -10 CRT and see where pin 12 goes internally?
> I don't have a broken -10 CRT to look at.
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Saturday, January 26, 2013 10:22 AM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update
>
>
>
>
> This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.
>
> I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.
>
> The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.
>
> Good luck and email to the list if any problems.
>
> As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)
>
> Regards,
> Tom
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 9:01 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> Hi Tom,
>
> That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A. The HV multiplier has a short flexible lead and connector..
>
> I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.
>
> Anyway, off to the archives.
>
> Thanks,
> Tom
>
>
> ----- Original Message -----
> From: Tom Jobe
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 8:23 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> Hi Tom,
> I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion about the later "dash 10" version of the 2232 CRT.
> I do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).
> tom jobe...
>
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 5:01 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]
>
>
>
>
> It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.
>
> Next question,
>
> Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.
>
> I need to find a junker 2232 with a good tube.
>
>
> Regards,
> Tom
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Friday, January 18, 2013 9:48 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
>
> Looks like the same tube is used in the following scopes:
> 2213A, 2215A, 2220, 2230, 2235, 2235L, 2236
>
>
> Tom
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Friday, January 18, 2013 9:34 PM
> Subject: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.
>
> Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10
>
>
> Regards,
> Tom
>

----- Original Message -----

From: chipbee40

To: TekScopes@...

Sent: Sunday, January 27, 2013 12:59 PM

Subject: [TekScopes] Re: Need part 2232 CRT and source for a tube - update

?

I second Tom on this, the only difference between the -10 version is a longer HT lead due to the updated multiplier having a built in socket instead of a flying lead. I do have duff versions of both tube and neither have the pin 12 connected. In the -00 as Tom says there is an unattached 3cm wire, In the -10 the pin is used as a support for one of the glass rods, no other connection. I've seen 2230's and 32's of all flavors with both versions of tube interchanged, the only way you can't do it is if the scope has the updated multiplier (requires a longer HT lead) and even then I've seen the HT leads modified. The missing components referred to do allow the use of a 465 CRT See about half way down the page. JC

--- In TekScopes@..., "Tom Jobe" wrote:
>
> Hi Tom,
> Thank you for posting a nice summary of your progress, but there is something wrong here.
> Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).
> I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.
> Later today I could post some pictures from my broken CRT collection.
> Pin 10 connects to the metal can the expansion mesh dome sits on.
> tom jobe...
> PS Maybe look at your -10 CRT and see where pin 12 goes internally?
> I don't have a broken -10 CRT to look at.
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Saturday, January 26, 2013 10:22 AM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update
>
>
>
>
> This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.
>
> I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.
>
> The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.
>
> Good luck and email to the list if any problems.
>
> As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)
>
> Regards,
> Tom
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 9:01 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> Hi Tom,
>
> That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A. The HV multiplier has a short flexible lead and connector..
>
> I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.
>
> Anyway, off to the archives.
>
> Thanks,
> Tom
>
>
> ----- Original Message -----
> From: Tom Jobe
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 8:23 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> Hi Tom,
> I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion about the later "dash 10" version of the 2232 CRT.
> I do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).
> tom jobe...
>
>
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Tuesday, January 22, 2013 5:01 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]
>
>
>
>
> It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.
>
> Next question,
>
> Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.
>
> I need to find a junker 2232 with a good tube.
>
>
> Regards,
> Tom
>
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Friday, January 18, 2013 9:48 PM
> Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
>
> Looks like the same tube is used in the following scopes:
> 2213A, 2215A, 2220, 2230, 2235, 2235L, 2236
>
>
> Tom
>
> ----- Original Message -----
> From: Tom Miller
> To: TekScopes@...
> Sent: Friday, January 18, 2013 9:34 PM
> Subject: [TekScopes] Need part 2232 CRT and source for a tube
>
>
>
>
> I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.
>
> Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10
>
>
> Regards,
> Tom
>

----- Original Message -----

From: Tom Jobe

To: TekScopes@...

Sent: Sunday, January 27, 2013 12:32 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update

?

Hi Tom,

Thank you for posting a nice summary of your progress, but there is something wrong here.

Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).

I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.

Later today I could post some pictures from my broken CRT collection.

Pin 10 connects to the metal can?the expansion mesh dome?sits on.

tom jobe...

PS Maybe look at your -10 CRT and see where pin 12 goes internally?

I?don't have a broken -10 CRT to look at.

?

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Saturday, January 26, 2013 10:22 AM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update

?

This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.

?

I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.

?

The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.

?

Good luck and email to the list if any problems.

?

As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)

?

Regards,

Tom

?

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Tuesday, January 22, 2013 9:01 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube

?

Hi Tom,

?

That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A.? The HV multiplier has a short flexible?lead and connector..

?

I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.

?

Anyway, off to the archives.

?

Thanks,

Tom

?

?

----- Original Message -----

From: Tom Jobe

To: TekScopes@...

Sent: Tuesday, January 22, 2013 8:23 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube

?

Hi Tom,

I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead?on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion?about the later "dash 10" version of the 2232 CRT.

I?do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).

tom jobe...

?

?

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Tuesday, January 22, 2013 5:01 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]

?

It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.

?

Next question,

?

Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.

?

I need to find a junker 2232 with a good tube.

?

?

Regards,

Tom

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Friday, January 18, 2013 9:48 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube

?

?

Looks like the same tube is used in the following scopes:

2213A, 2215A, 2220, 2230, 2235, 2235L, 2236

?

?

Tom

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Friday, January 18, 2013 9:34 PM

Subject: [TekScopes] Need part 2232 CRT and source for a tube

?

I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.

?

Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10

?

?

Regards,

Tom

Hi Tom,
Thank you for posting a nice summary of your progress, but there is something wrong here.
Pin 12 on the 154-0861-00 CRT is not connected to anything inside that CRT unless I'm confused (which is very likely).
I have several broken samples of that same CRT, and pin 12 comes into the CRT maybe 30 mm and then stops. It lays against the side of one of the four glass rods that support the internal structure, and touches no metal that I can see.
Later today I could post some pictures from my broken CRT collection.
Pin 10 connects to the metal can the expansion mesh dome sits on.
tom jobe...
PS Maybe look at your -10 CRT and see where pin 12 goes internally?
I don't have a broken -10 CRT to look at.



----- Original Message -----
From: Tom Miller
To: TekScopes@...
Sent: Saturday, January 26, 2013 10:22 AM
Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update




This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.

I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.

The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.

Good luck and email to the list if any problems.

As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)

Regards,
Tom



----- Original Message -----
From: Tom Miller
To: TekScopes@...
Sent: Tuesday, January 22, 2013 9:01 PM
Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube




Hi Tom,

That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A. The HV multiplier has a short flexible lead and connector..

I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.

Anyway, off to the archives.

Thanks,
Tom


----- Original Message -----
From: Tom Jobe
To: TekScopes@...
Sent: Tuesday, January 22, 2013 8:23 PM
Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube




Hi Tom,
I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion about the later "dash 10" version of the 2232 CRT.
I do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).
tom jobe...




----- Original Message -----
From: Tom Miller
To: TekScopes@...
Sent: Tuesday, January 22, 2013 5:01 PM
Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]




It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.

Next question,

Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.

I need to find a junker 2232 with a good tube.


Regards,
Tom


----- Original Message -----
From: Tom Miller
To: TekScopes@...
Sent: Friday, January 18, 2013 9:48 PM
Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube





Looks like the same tube is used in the following scopes:
2213A, 2215A, 2220, 2230, 2235, 2235L, 2236


Tom

----- Original Message -----
From: Tom Miller
To: TekScopes@...
Sent: Friday, January 18, 2013 9:34 PM
Subject: [TekScopes] Need part 2232 CRT and source for a tube




I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.

Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10


Regards,
Tom

If the video RAM was bad, I would expect it to affect the on screen menus and graphics, not just the trace. It's odd that it passes the self test. Have you run the full self test from the test menu? Have you tried resetting the factory defaults? Does it still pass SPC?

--- In TekScopes@..., "iw0uwl" wrote:

Dear forumers,

I need help for my TDS-524A showing no trace on any channel.
Recap and board wash performed succesfully time ago.
Self test is OK, no error in the log.
I am pretty sure it triggers properly because the "T" symbol on screen moves according to the signal.
I am thinking a video RAM chip may be defective and I replaced 2 of them without result.
There are 8 ram chips related to waveform display.

Hope someone would like to offer some hint on where to investigate.

Many thanks in advance to all of you.

Enrico

----- Original Message -----

From: Mark Wendt (Contractor)

To: TekScopes@...

Sent: Sunday, January 27, 2013 11:42 AM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update

?

On 1/27/2013 10:41 AM, Tom Miller wrote:
>
>
> No Mark, I did not get photos yet. I still need to open it up when I
> run through the calibration and will take a few photos then.
> I did put up a shot of the defect in the CRT.
> Regards,
> Tom

Tom,

I must have missed that. What folder did you put the pic in? I can't
seem to find it in the photo's section.

Thanks,
Mark

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Saturday, January 26, 2013 10:22 AM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube - update

?

This is a follow-up to my repair of a 2232 scope with a bad CRT, part number 154-0861-10.

?

I was able to find, for a very good price, a bad 2215A that seemed to have a good tube. It turns out that the 2215A uses a 154-0861-00 CRT. This tube brings the mesh electrode out on pin 12 of the CRT socket. The -10 tube either does not have a mesh or it is internally connected to some other element. In any event, the -00 tube must have the mesh connected to a -100 volt bias. Operating with the mesh un-connected will cause all sorts of strange behavior such as the display size changing with position control changes.

?

The good news is that there is track on the PC board to support the components needed to make this negative supply. In essence, a high speed diode (UF4007) is connected to the anode of CR955, C853. The cathode connects to this point. A 0.1/200 volt disk capacitor connects the anode of this diode to ground. A 470K/ 1/4 watt resistor goes across the capacitor. Run a wire from this point, (anode of the UF4007) to pin 12 of the -00 CRT. Now the new tube will work fine. A careful study of the power supply in this area will reveal that there is unused track needed to do this mod.

?

Good luck and email to the list if any problems.

?

As a side note, if I can find a way to re-weld the connection from pin 5 to the astig electrode inside the tube, I will regain a working tube. Anyone have a welding laser? :)

?

Regards,

Tom

?

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Tuesday, January 22, 2013 9:01 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube

?

Hi Tom,

?

That's what I read somewhere, that the -00 tube was for the early units. The one in my scope is the -10 and it does not have the mesh. At least it is not brought out on pin 12 like in the 2215A.? The HV multiplier has a short flexible?lead and connector..

?

I scored a "for parts" 2215A today for mostly shipping cost so we will see. If necessary, I can add in the -100 volt supply.

?

Anyway, off to the archives.

?

Thanks,

Tom

?

?

----- Original Message -----

From: Tom Jobe

To: TekScopes@...

Sent: Tuesday, January 22, 2013 8:23 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube

?

Hi Tom,

I think the CRT for your 2232 is identical to the one in a 2215A (154-0861-00), unless you have one of those late 2232's that has the shorter HV lead?on the CRT (154-0861-10). The HV multiplier changed on the last 2232's. It did not have a flexible lead coming out of the multiplier, the CRT HV lead plugged directly into it on the front side. The Tekscopes archive has some discussion?about the later "dash 10" version of the 2232 CRT.

I?do believe that all of those 154-0861-xx CRT's use the "expansion mesh" (or whatever it was called).

tom jobe...

?

?

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Tuesday, January 22, 2013 5:01 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube [1 Attachment]

?

It looks like the tube has a factory defect where they failed to weld the pin 5 lead to the strap going to the astig element. I wonder if there is any way to externally weld it? Induction welding, laser, other? I can't use high voltage as there is no access to the element. I attached a picture showing the fault. If I tap the tube, the screen comes into focus. I verified all the connections externally.

?

Next question,

?

Somewhere I read that a tube from a 2215A would work. However, that tube uses a mesh electrode whereas the 2232 tube does not. The only difference that I can see is they connect the mesh (pin 12) to a -100 volt supply.

?

I need to find a junker 2232 with a good tube.

?

?

Regards,

Tom

?

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Friday, January 18, 2013 9:48 PM

Subject: Re: [TekScopes] Need part 2232 CRT and source for a tube

?

?

Looks like the same tube is used in the following scopes:

2213A, 2215A, 2220, 2230, 2235, 2235L, 2236

?

?

Tom

?

----- Original Message -----

From: Tom Miller

To: TekScopes@...

Sent: Friday, January 18, 2013 9:34 PM

Subject: [TekScopes] Need part 2232 CRT and source for a tube

?

I received a 2232 scope with the UPS obligatory damage. Something in the tube is loose and the display is way out of focus. A very light tap on the tube seems to cause an internal connection to make and focus comes in very briefly.

?

Does anyone have a tube for the 2232 scope? Part number 154-0861-00 or -10

?

?

Regards,

Tom

Dear forumers,

I need help for my TDS-524A showing no trace on any channel.
Recap and board wash performed succesfully time ago.
Self test is OK, no error in the log.
I am pretty sure it triggers properly because the "T" symbol on screen moves according to the signal.
I am thinking a video RAM chip may be defective and I replaced 2 of them without result.
There are 8 ram chips related to waveform display.

Hope someone would like to offer some hint on where to investigate.

Many thanks in advance to all of you.

Enrico

What I think is happening is the control grid circuit is rectifying
the positive input peaks to set the bias. A JFET replacement would
operate in the same way although I may have to change the grid bias
resistor or in the worst case, add a paralleled resistor and capacitor
for source biasing.

Vacuum tube design is before my time so I am just having fun reverse
engineering. The time mark outputs which work fine do most of what I
need.

The screen grid series resistors are 27K and connect to the 125 volt
anode supply so the currents are all about 1.8 milliamps which is well
under the 3.6 milliamp maximum. That makes the total cathode current
less than half of the 20 milliamp maximum at least on the 20 MHz
amplifier. The 50 Mhz and 100 MHz amplifiers operate with self biased
grid voltages closer to ground so their anode current should be
higher. On later units like mine, the screen grid voltage of
oscillator V10 is fixed by a zener diode at about 52 volts.

None of the carbon composition resistors I checked were out of
tolerance. Of course, everything up to the 100 MHz output *does*
work.

The 200 MHz doubler at least sort of works but the output looks low
and distorted to me. I may try replacing the germanium diodes with
1N270s or RF schottky diodes. The only information I have on the
152-0075-00 diodes Tektronix used is from the Tektronix parts book.

On Sat, 19 Jan 2013 18:44:49 -0000, "Ed Breya"
wrote:

Wow - that means the grid currents must be over -100 uA to get that much on 100k grid leak resistors. I don't recall what the screens were hooked to, but I think you should calculate the screen currents too, to see the total cathode currents.

If they only used 5 mA or so plate current, you can easily replicate that with modest JFET and cascode NPN current.

Ed

--- In TekScopes@..., David wrote:

I added a 10 ohm current shunt to the anode circuit of V20, the 20 MHz
amplifier, and used it to test all of the tubes. The anode currents
varied from 4.8 to 5.7 milliamps, the gate voltages varied from -10.3
to -12.6 volts, and the screen grid voltages varied from 72.2 to 76.0
volts except for one 7587 which had a screen voltage of 63.5 volts for
some reason.

That one also had the highest anode current but not the highest grid
voltage. I don't know if that is significant.

I can get 2N5950 JFETs and MPSH11 NPNs cheap at the moment so I will
start off with them.

On Wed, 02 Jan 2013 22:06:30 -0000, "Ed Breya"
wrote:

You may want to try swapping tubes from the other spots too, although it seems they're all biased for the same operating conditions, so should wear at the same rate - but if they are only on when needed for their specific function, then it all depends on the history of use. I think the only one that's always on then, would be the 10 MHz oscillator, so it should have the most wear.

I looked up the 7587 and see that it's rated for 20 mA max cathode current, but there were no charts showing what it should be near zero grid bias - unless the grid current gets pretty high, it doesn't seem that it will make much into 100k. It would be interesting to see what it is if you measure it and the actual plate currents.

I think your cascode version with a JFET and an NPN would be best, since you can then assure cutoff by pulling the base to ground. The double-JFET form won't positively cut off unless you can pull the gate negative, making it more complicated. You will have to watch out for the voltage ratings of the NPN to make sure it can handle the cutoff conditions.

I'd recommend around +15V or so for the bases (via small R so they won't oscillate on their own), and about +25V for the collector supply. Those should work with many types of VHF JFETs and small signal RF NPNs. For parts I'd recommend something like 2N5109 or MPSH10 for the NPN, and a J300 with around 15-25 mA Idss.

Ed