sorry about the voltage ripple table. it looked a lot prettier when i created it.
toggle quoted message
Show quoted text
--- In TekScopes@..., "pdxareaid" <public_email@...> wrote:
i'm not sure of the best way to post this followup for all previous responders see. so, i'm replying to my original post...
i spent some quality time with the new toy today. i guess it just needed some attention...
i turned it on and found i was getting one spot on the screen rather than a massive glow (i kept it de-focused as it was full intensity.)
i looked around at the tantalums that had one smoking yesterday and noticed a solder bead on one of the three.
i poked it and it fell off...and a trace slowly snapped back. some adjustments and things were sweeping! how the heck does a solder bead on the outside of a tantalum cause this? was there a cold solder i tweaked at the same time?
so since it appeared it was not going to catch fire this time, i let it run and things stayed nice and stable.
i turned it off and tested all of the transistors in the area of the smoking tantalum (this is at rear of sweep logic board btw).
they all appear ok.
man, you people with socketed transistors have it easy. try testing a transistor on a 465M. you have to desolder it...no sockets! (except about four i found that probably should not have been there lol) no sockets is part of the "ruggedized for the military" modification.
so, things are working fine with a few mechanical probs. i found a loose transistor preventing the x1 light on chnl 1, stuck it back in and that prob is fixed.
the horizontal position pot is wonky. lots of play. i've seen this before on the 465M. i guess 35yrs of use takes it's toll.
the main intensity pot is dirty or toast. i will probably attack it soon. but careful fiddling and it gets you where you want to be.
the B delay pot knob is offset to 0.2 when bottomed out. and it shows on the trace. i think this was previous owners way of correcting for improper registration on the trace. likely a simple calibration tweak will fix it and i'll rezero that pot knob.
this is a significant one:
the A trig view only shows a flat line but everything is triggering properly (including B sweep stuff).
possibly a loose jumper wire etc. i'll chase it soon.
since it was staying up (for 2 hours now) i took PS readings at test points.
voltage VDC, ripple mV p-p
supply voltage spec ripple spec
+110 108.2 106.7 to 113.3 16 20
+55 54.9 54.62 to 55.39 3 4
+15 15.00 14.75 to 15.26 1 2
+5 5.01 4.92 to 5.09 1 2
-8 -8.01 -7.86 to -8.14 1 2
not too shabby. i may take a look at getting +110 closer to 110. i am still nervous about ps filter caps because my 465M worked for a few hours then tore itself apart with failed caps and exploding transistors. i'll keep an eye on it for a while. it would be nice not to have to recap this thing. (i know about reforming but i'd rather recap and be sure)
all the other bells and whistles seem to be working x10-mag etc. and timing and vertical deflection look right on.
So, not a very exciting fix but so far i have a nice working 465B but i'm quite sure why :-o
phil
--- In TekScopes@..., "pdxareaid" <public_email@> wrote:
I just picked up a 465B off Craigslist. Came with 10x probe.
the ad:
"Unit was working, then stored for 3 or 4 years. When I turned it on recently, it died. There's a beam, but no sweep. It worked well before that. I was hoping someone would want to fix it and put it to good use. Free."
Nice guy...engineer...just did not want to deal with it.
He mentioned electrical burning smell when turning on.
I got it home and spent 10 minutes with it...opened it up and turned it on. Burning smell coming from PS section I think. Whole screen glows off and on, no trace to speak of.
It is in excellent shape otherwise, calibration stickers all over it.
I am thinking PS filter caps to start, then tantalum and electrolytic search after that.
Phil
|
hi gerry,
i think the problem is bigger than your email. several members have been spoofed...look at the "hello" posts...they are from several different members.
phil
ps. your 465 seeing the light?
toggle quoted message
Show quoted text
--- In TekScopes@..., G Oswald <ozzie_7@...> wrote:
Thanks Phil!! Apparently I have been hacked and changed my password. Hope that stops it.
Gerry
--- On Mon, 9/24/12, pdxareaid <public_email@...> wrote:
From: pdxareaid <public_email@...>
Subject: [TekScopes] Re: Hello
To: TekScopes@...
Date: Monday, September 24, 2012, 7:55 PM
??
will the moderator please get rid of this scumbag. gerry's etc. email has apparently been cracked. guaranteed he did not send this post. and i recvd personal mail from him with the same garbage in it.
the originating ip address appears to be in ireland.
77.238.189.varies
varies=apparently dynamic dsl.
--- In TekScopes@..., G Oswald <ozzie_7@> wrote:
wow this is crazy you should give it a look
|
i'm not sure of the best way to post this followup for all previous responders see. so, i'm replying to my original post...
i spent some quality time with the new toy today. i guess it just needed some attention...
i turned it on and found i was getting one spot on the screen rather than a massive glow (i kept it de-focused as it was full intensity.)
i looked around at the tantalums that had one smoking yesterday and noticed a solder bead on one of the three.
i poked it and it fell off...and a trace slowly snapped back. some adjustments and things were sweeping! how the heck does a solder bead on the outside of a tantalum cause this? was there a cold solder i tweaked at the same time?
so since it appeared it was not going to catch fire this time, i let it run and things stayed nice and stable.
i turned it off and tested all of the transistors in the area of the smoking tantalum (this is at rear of sweep logic board btw).
they all appear ok.
man, you people with socketed transistors have it easy. try testing a transistor on a 465M. you have to desolder it...no sockets! (except about four i found that probably should not have been there lol) no sockets is part of the "ruggedized for the military" modification.
so, things are working fine with a few mechanical probs. i found a loose transistor preventing the x1 light on chnl 1, stuck it back in and that prob is fixed.
the horizontal position pot is wonky. lots of play. i've seen this before on the 465M. i guess 35yrs of use takes it's toll.
the main intensity pot is dirty or toast. i will probably attack it soon. but careful fiddling and it gets you where you want to be.
the B delay pot knob is offset to 0.2 when bottomed out. and it shows on the trace. i think this was previous owners way of correcting for improper registration on the trace. likely a simple calibration tweak will fix it and i'll rezero that pot knob.
this is a significant one:
the A trig view only shows a flat line but everything is triggering properly (including B sweep stuff).
possibly a loose jumper wire etc. i'll chase it soon.
since it was staying up (for 2 hours now) i took PS readings at test points.
voltage VDC, ripple mV p-p
supply voltage spec ripple spec
+110 108.2 106.7 to 113.3 16 20
+55 54.9 54.62 to 55.39 3 4
+15 15.00 14.75 to 15.26 1 2
+5 5.01 4.92 to 5.09 1 2
-8 -8.01 -7.86 to -8.14 1 2
not too shabby. i may take a look at getting +110 closer to 110. i am still nervous about ps filter caps because my 465M worked for a few hours then tore itself apart with failed caps and exploding transistors. i'll keep an eye on it for a while. it would be nice not to have to recap this thing. (i know about reforming but i'd rather recap and be sure)
all the other bells and whistles seem to be working x10-mag etc. and timing and vertical deflection look right on.
So, not a very exciting fix but so far i have a nice working 465B but i'm quite sure why :-o
phil
toggle quoted message
Show quoted text
--- In TekScopes@..., "pdxareaid" <public_email@...> wrote:
I just picked up a 465B off Craigslist. Came with 10x probe.
the ad:
"Unit was working, then stored for 3 or 4 years. When I turned it on recently, it died. There's a beam, but no sweep. It worked well before that. I was hoping someone would want to fix it and put it to good use. Free."
Nice guy...engineer...just did not want to deal with it.
He mentioned electrical burning smell when turning on.
I got it home and spent 10 minutes with it...opened it up and turned it on. Burning smell coming from PS section I think. Whole screen glows off and on, no trace to speak of.
It is in excellent shape otherwise, calibration stickers all over it.
I am thinking PS filter caps to start, then tantalum and electrolytic search after that.
Phil
|
Thank you, sir! > To: TekScopes@... > From: bhenry@... > Date: Mon, 24 Sep 2012 16:05:35 +0000 > Subject: [TekScopes] Re: 5440 MOD WT? > > EIA Power Connector; Delete Chassis Tracks; Rack Mount Ears Punched for EIA Standard; +$215.00. > > --- In TekScopes@..., DON CRAMER wrote: > > > > > > Would anyone with the secret code book know what comprises MOD WT on the 5440 mainframe? > > Would anyone with access to the 'secret code book' know what comprises "MOD WT" on the 5440 mainframe (circa 1986)? I'm guessing one item might be the convenient IEC power entry. > > Thanks in advance, > > Don > > > > > > > ------------------------------------ > > Yahoo! Groups Links > > <*> To visit your group on the web, go to: > http://groups.yahoo.com/group/TekScopes/ > > <*> Your email settings: > Individual Email | Traditional > > <*> To change settings online go to: > http://groups.yahoo.com/group/TekScopes/join > (Yahoo! ID required) > > <*> To change settings via email: > TekScopes-digest@... > TekScopes-fullfeatured@... > > <*> To unsubscribe from this group, send an email to: > TekScopes-unsubscribe@... > > <*> Your use of Yahoo! Groups is subject to: > http://docs.yahoo.com/info/terms/ >
|
Re: Interesting account of HP's attempt to compete with the 7000 series
I have never heard the term "chary" before, and thought it was a typo until it appeared more than once.?
?
Now?that I see it's?real, is?it a regional term, or maybe it's gone out of fashion?? Why would one use it instead of, say, wary?
?
-Dave
From: "Miroslav Pokorni" <mpokorni@...> To: TekScopes@... Cc: "John Miles" Sent: Sunday, September 23, 2012 10:24:29 PM Subject: Re: [TekScopes] Interesting account of HP's attempt to compete with the 7000 series
?
"review would be with two guys notoriously chary about poor engineering detail execution ". That is probably why hp, unlike Tektronix, did not have any overloaded/discolored resistors or electrolytics running on only few volts of voltage margin.
Miroslav Pokorni
On 9/21/2012 5:38 PM, John Miles wrote:
?
Chuck House talks about where the HP logic-analyzer product line came from -- a classic solution-in-search-of-a-problem scenario, but one where it turned out that there actually was a problem to be solved.? (Warning: very long.)
?
"We'd already spent $2 million, with a burn rate that had to escalate for our next phase. We were, at best, two years from delivery. The Tek engineers told me that they had spent $34 million dollars and seven years of effort, to get to this (IEEE) show with an incomplete line. Whew!
Worse, my team was having trouble debugging our own prototype scheduled for a division review in four weeks. That review would be with two guys notoriously chary about poor engineering detail execution - Packard and Hewlett, headed to Colorad! o Springs in late April. It was not hard to figure out what to do. I had to cancel Next Gen.
The first problem was that I was in love with it..."
-- john, KE5FX
?
|
Thanks Phil!! Apparently I have been hacked and changed my password. Hope that stops it.
Gerry
|
--- On Mon, 9/24/12, pdxareaid wrote:
From: pdxareaid
Subject: [TekScopes] Re: Hello
To: TekScopes@...
Date: Monday, September 24, 2012, 7:55 PM
?
will the moderator please get rid of this scumbag. gerry's etc. email has apparently been cracked. guaranteed he did not send this post. and i recvd personal mail from him with the same garbage in it.
the originating ip address appears to be in ireland.
77.238.189.varies
varies=apparently dynamic dsl.
--- In TekScopes@..., G Oswald wrote:
>
>
> wow this is crazy you should give it a look
>
|
will the moderator please get rid of this scumbag. gerry's etc. email has apparently been cracked. guaranteed he did not send this post. and i recvd personal mail from him with the same garbage in it.
the originating ip address appears to be in ireland.
77.238.189.varies
varies=apparently dynamic dsl.
toggle quoted message
Show quoted text
--- In TekScopes@..., G Oswald <ozzie_7@...> wrote:
wow this is crazy you should give it a look
|
Re: TDS744A adjustment software needed
Now things are getting confusing. I decided to try the original (known good) attenuators in the 744A, and it passed SPC, but acquisition faild the self test with lots of trigger related errors. I restored the DS1486 from a backup (which contains the error log), and now most of the errors have gone way, but I still get one error from the acquisition test:
TrigNibDiag, TrigNib A is 0x0
Apart from failing the self test, it appears to be working properly.
Another odd thing is that it reports that TV trigger passes even though there is no TV trigger installed. I did have a TV trigger board in the scope at one time, but not now, and it didn't originally come with option 5.
I may try completely erasing the DS1486 since my only backup was made after I had added the TV trigger board. The DS1650 was identical to my backup, so that can't be the problem.
|
Re: Help I got a Tracking Generator for my Tek 2710 but how do I install it?
Hello Robert:
As luck would have it, I was reminded of which vendor may be able to assist you in having those cables made. The name of the vendor is Test Parts, and they can be found using a google search.?
They will not be able to build the assembly using a Tektronix part number, but if you can specify the dimensions, and connector type they may be able to help. ?I typically buy RF connectors in bulk from this vendor, but remember discussing with them in the past the possibility of manufacturing specialty cables in small quantities. ?
Rich
Sent from my iPhone
On Sep 24, 2012, at 12:59 AM, "dreadlk" < dreadlk@...> wrote:
?
Hi Herbert
Thanks, I had seen those numbers but I thought they would have a corresponding long part number like the one I see on Ebay and in the SV manual for other parts. I was looking through the PDF for it but never found it, now I know why LOL.
Thanks for the offer Herb I may take you up on it pretty soon, maybe ask you instead for some photos if possible of how yours are routed so I can see where to make the bends. For now I think I can just estimate the amount I will need and buy 25% extra just in case.
BTW any suggestions on a good online place to order the parts? Digikey or is there some place better?
Thank you
Robert
--- In TekScopes@..., Measurement wrote:
>
> Hi,
>
> the parts are named W52 and W53 and W55.
>
> - W55 is solder end to SMB
> - W52 SMA-male to N-female
> - W53 SMA-male to SMA-male
>
> Would it help, to know the length ???
> I can measure in mz 2712 !
>
> Herbert
>
>
> Am 23.09.2012 21:48, schrieb dreadlk:
> >
> > For starters I found this on ebay but it looks too short.
> >
> >
> > <>
> >
> > I am scouring the 2712 SVC Manual looking for the correct part number
> > but so far no luck, it is diagramed but the part numbers are not
> > listed for any of the cables.
> >
> > --- In TekScopes@... ,
> > "dreadlk" <dreadlk@> wrote:
> > >
> > > Thanks for the information, I agree with both of your assessments.
> > It was easy to find the Cables in a flex format so I went out and
> > bought some on day one. Now that I read your posts I know it won't
> > work and my dilemma is that I have no idea where to find the Semi
> > Rigid versions. I am going to do some searching but I have a feeling I
> > am going to need a lot of luck on my side to make this happen. If the
> > unit will error out it makes little sense for me to proceed further
> > until I locate these cables so at this point I am going to mark out
> > the plate for cutting and drilling based on Jims info and then when I
> > know where to get the needed cables I will start the cutting and drilling.
> > >
> > > If anybody has any of these cables and is willing to sell them
> > please let me know or if you have any ideas on a source that might
> > sell them the info would be greatly appreciated.
> > >
> > > Robert
> > > KD8MJR
> > >
> > > --- In TekScopes@...
> > wrote:
> > > >
> > > > Hello Robert:
> > > >
> > > >
> > > >
> > > > With regard to the rigid coax cable used to connect the TG to the
> > front
> > > > panel, I think you are going to want to use this. While at low
> > frequency
> > > > other types of cable may work fine, when you get into microwave
> > you may run
> > > > into a problem with the TG Gain Flatness Normalization. If the
> > output of the
> > > > TG is off by more than +/-3dBm (This is from memory so double
> > check), it
> > > > will show up as a fault when you first attempt to normalize.
> > > >
> > > >
> > > >
> > > > Rich, AJ3G
> > > >
> > > >
> > > >
> > > > From: TekScopes@...
> > [mailto:TekScopes@...
> > ] On Behalf
> > > > Of dreadlk
> > > > Sent: Friday, September 21, 2012 2:33 PM
> > > > To: TekScopes@...
> > > > Subject: [TekScopes] Re: Help I got a Tracking Generator for my
> > Tek 2710 but
> > > > how do I install it?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Hi Jim
> > > >
> > > > Thank you so much for the reply. I do have a VR BW board in that
> > cavity and
> > > > I received the TG with no cables at all, I will have to figure out
> > how to
> > > > obtain the needed parts and where to source them.
> > > > I was wondering if flexible cables with SMA and Type N will work
> > or does it
> > > > have to be the rigid stuff? I obtained a copy of the 2712 SV
> > Manual and am
> > > > going to look through it tonight to try and get a better idea of
> > what I am
> > > > dealing with, I want to thank you for your post, it certainly
> > clarified
> > > > things for me, I hope I am up to the task of doing this Job as I
> > must admit
> > > > I am a bit worried about messing up my 2710 it has been absolutely a
> > > > pleasure to use over the years and is in fantastic condition.
> > > >
> > > > Let me ask you Jim is there any chance of having my proverbial
> > cake and
> > > > eating it too?
> > > > I mean could I leave in the VR BW board and run cables to the Back
> > of the
> > > > unit and put the TG in a separate enclosure, kind of like a DIY
> > 2707? I am
> > > > just wondering if anybody has ever done that, I would imagine that
> > it might
> > > > not be practical but I just wanted to get your opinion.
> > > >
> > > > Anyway Jim I am going to take out the VR BW board and see what I
> > am dealing
> > > > with. If you have any suggestions please post them, and thanks so
> > much for
> > > > your help.
> > > >
> > > > Robert
> > > > KD8MJR
> > > >
> > > > --- In TekScopes@...
> >
> > ,
> > > > "Jim" wrote:
> > > > >
> > > > >
> > > > >
> > > > > Hi Robert -
> > > > > The TG mounts in the cavity on the left side of the analyzer.
> > This also is
> > > > the same cavity which houses the Variable Resolution BW board. You
> > can only
> > > > use one or the other, not both. It wasn't clear whether you have
> > the VR BW
> > > > board or not.
> > > > >
> > > > > There are two semi-rigid cables that will need to be made. One
> > routes the
> > > > RF to the front panel and has an SMA on one end and a Type N on
> > the other.
> > > > The other routes the 2nd LO (2 GHz) to the TG. Did you receive
> > these cables?
> > > > The ribbon cable will plug into the main power supply board to
> > provide the
> > > > interface. in fact, I just remembered that one end of the ribbon
> > cable is
> > > > crimped to a IDC connector that is *soldered* to the power supply
> > board. The
> > > > other end uses at typical IDC connector that will plug into the
> > TG. The 2712
> > > > (not 2710) service manual has a block diagram that will aide in
> > making the
> > > > necessary connections. This manual is down loadable from the
> > site
> > > > and will be a better reference for what you are wanting to do. You
> > will have
> > > > some work to do to get your TG up and running. Take your time and
> > it will go
> > > > smoothly.
> > > > >
> > > > > Good luck.
> > > > > Jim
> > > > > WB5KYE
> > > > >
> > > > >
> > > > > --- In TekScopes@...
> >
> >
> > > > "dreadlk" wrote:
> > > > > >
> > > > > > I posted about a month ago about searching for an internal
> > tracking
> > > > generator for my 2710 SA and I finally found one from an old Tektronix
> > > > dealer.
> > > > > >
> > > > > > Now I have this unit with Id No 119-3889-07 it's in a golden
> > colored all
> > > > metal case with 3 female SMA connectors and a 10 pin 2 row IDC
> > connector.
> > > > > >
> > > > > > Luckily I found several old Mobo serial connectors that are
> > the right
> > > > size but only use 9 of the 10 pins so I removed the wire and made
> > a 10 wire
> > > > straight pin to pin cable from the connector ends.
> > > > > >
> > > > > > Now I open up my 2710 to locate grounds and power pins on this IDC
> > > > connector and have a WTF moment. Where the Heck does this thing go!! I
> > > > remember a side section that was free but the unit won't fit and
> > all the
> > > > card slots are used up! Plus its just too big, so I have no clue
> > how this
> > > > fits into a 2710.
> > > > > >
> > > > > > I can find nothing on the net about this Option 04 tracking
> > generator,
> > > > it's not even listed in the 2710 service manual but I have seen
> > several 2710
> > > > sold with Tracking Gens built in and the guy who sold it to me
> > told me it
> > > > works with the 2710 Arggggh....
> > > > > >
> > > > > > Anybody have any idea what I should do next? I can't even
> > locate the 10
> > > > pin connector that it supposed to plug into much less fit the unit
> > into my
> > > > 2710. Man I hope I did not waste all that money, I am having
> > serious regrets
> > > > now. Sorry if this comes of as a Crazy Rant but I should have done my
> > > > homework before making this purchase, I am upset with myself.
> > > > > >
> > > > > > Robert
> > > > > > KD8MJR
> > > > > >
> > > > >
> > > >
> > >
> >
> >
>
|
Re: 2445A X2 mains input capacitor failures
Hi Alan,
I also had read about the AC line-filtering caps being a weak point so I replaced them as a preventive measure when recapping the LV power supplies for my 2465A and 2467.
The plastic bodies on the caps coming out of the 2467 showed substantial cracking; the 2465A caps less so. My theory is that the caps deteriorated and in your case, failed due to age.
I suggest you check the condition of R1016 and R1018 since your caps failed catastrophically. Perhaps those resistors were damaged when the caps shorted and blew up.
Since your AC mains voltage is at 230V (compared to the US at 120V) I would expect that your caps will be more stressed and have a greater failure likelihood (vs. North American units) as time passes.
Is your chassis dated Feb 1998 or Feb 1988? I suspect the latter.
My units were produced in May and June 1988. I suggest you just figure out what you need to unscrew to get the power supply out. In my case I found it is not necessary to unsolder the fan power cable but it was needed to remove and set aside the fan for access to some of the screws holding the LV power supply in place.
Regarding the black plastic piece, is that the lever that depresses the AC Power switch? If yes, that does not need to be removed.
Patrick Wong AK6C
toggle quoted message
Show quoted text
--- In TekScopes@..., "g3xaq" <alan@...> wrote:
Both the X2-rated 0.068uF capacitors on the mains input on my 2445A scope exploded today with much smoke and consequential panic. The part numbers at C1016 and C1018.
I've read of similar failures here and elsewhere. Has anyone a theory for why they die? Should I be looking for another root cause fault?
Getting the PCB out for repair seems to be a challenge. My unit doesn't match the manual I downloaded, in that there is an extra screw next to the mains switch lever that holds a piece of black plastic to the chassis that appears to need to be removed. It is not mentioned in the manual and of course I do not have a long enough Torx driver to hand to get to it. The description of removal of the Vertical Bracket doesn't seem to match mine either and I don't really see just yet why it needs to come off. Same for the fan, although I can't see propely if indeed it is in the way. My chassis is Feb 1998 and my manual is Dec 1986. Are there different revs of the 2445A that don't quite match up with the service manual?
Thanks, Alan.
|
Re: Can you display the left plugin using a 5D10?
Hi,
you might know more than I do, but I have not seen any reference that the 5D10 can actually display a 100x readout coded probe.
The only 5000 series scopes which can do this are the 5440 and the 5441 in my humble opinion.
The 5116 is so rare I have never seen any offered in Europe, so I cannot comment on that.
On the 3-color display: Have you verified the 5D10's serial number yet, as per Brian's previous hint?
Also, the 5A48 manual available at is helpful.
The schematics in Section 03-15 on page 26 are key to understand the 10x / 100x readout function.
On the 5D10, you are right - that digitizer shall be able to work with 5A22N and similar diff., amps.
Tektronix even promoted this combination as you know already. Isn't that great?
If you really are into the 5D10, has the service manual as well as for the mentioned 5441/5440.
I have no affiliation with Dave; I am just a satisfied customer.
Your postings remind me of that box that is still waiting for me, under the over next lab desk...
Cheers,
Magnus
|
2445A X2 mains input capacitor failures
Both the X2-rated 0.068uF capacitors on the mains input on my 2445A scope exploded today with much smoke and consequential panic. The part numbers at C1016 and C1018.
I've read of similar failures here and elsewhere. Has anyone a theory for why they die? Should I be looking for another root cause fault?
Getting the PCB out for repair seems to be a challenge. My unit doesn't match the manual I downloaded, in that there is an extra screw next to the mains switch lever that holds a piece of black plastic to the chassis that appears to need to be removed. It is not mentioned in the manual and of course I do not have a long enough Torx driver to hand to get to it. The description of removal of the Vertical Bracket doesn't seem to match mine either and I don't really see just yet why it needs to come off. Same for the fan, although I can't see propely if indeed it is in the way. My chassis is Feb 1998 and my manual is Dec 1986. Are there different revs of the 2445A that don't quite match up with the service manual?
Thanks, Alan.
|
Spoken For: Free for postage: Tektronix C1001 video camera
Hello,--
The Tektronix C1001 camera is spoken for (and in fact is on its way
to the person who claimed it). My thanks go to everyone who inquired.
Thanks, and 73--
Brad AA1IP
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Re: OT.(slightly) Telequipment D55A Z mod
Hi Jeb, ? Just found this old email in my trash bin and thought I would make a couple of comments on it. ? Yes, Telequipment did have an official connection to Tek in the early 70¡¯s.? Tek bought the U.K. based Telequipment company as a quick and easy way to enter the ¡°low cost¡± market for scopes.? I was a Sales Engineer for Tek at the time in the Boston area and, like all the other Tek Sales Engineers I knew at the time, we thought it was a MISTAKE!? Customer expectations for anything Tek sold (including Telequipment stuff) were VERY high but the TQ stuff just wasn¡¯t up to it.? Eventually (about two years later), Tek closed Telequipment and discontinued the line. ? You got a good deal on the 310 but by now, I suspect you have discovered that the cabinet parts are not interchangeable between the 310 and the 310A . . . ? Stan ?
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From: TekScopes@... [mailto:TekScopes@...] On Behalf Of jeb_brygider
Sent: Friday, April 17, 2009 9:07 PM
To: TekScopes@...
Subject: [TekScopes] OT.(slightly) Telequipment D55A Z mod?
While not a true Tek scope like all my old 500 series I understand it was a British sorta relative. I found one locally, and was wondering if anyone on the group had experience with one, and was it a true dual beam scope, not dual trace. Has it got any neat features to make me want to add it to my growing collection? It was among some pieces of gear that the wife of an old Tek employee was disposing of. He worked field service and travelled to europe quite often in the 60's and early 70's. I bought some Tek equipment from her and wanted to make her an honest offer for it, but didn't need another orphan project. I did find a partial manual on line, but wanted to see if anybody in the group was familiar with them. Was there an actual tek/ Telequipment association at any time? I seem to recall my Tektronix sales rep in Boston many years ago, offering to sell me a Telequipment scope (1969 or 70) to save me some money. It is kind of rough, and has been in a closet right near the shore for at least 15 years unused.
So, any ideas as to desirability and a fair price? I need another tube type scope like I don't know what, but I'm a sucker for quality test equipment,as are most of us on this group! This lady did sell me a Tek 310 missing all the tubes and some front panel controls for $2.00, since I needed the outside covers which will go on my 310A. My wife says I'm soon to be forbidden to accumulate more, unless I cull the herd and get down to a more reasonable sized collection, (unless the deal is too good to pass up!) LOL Aren't they all? Thanks for any help, Jeb Brygider KE7LIU Washington state.
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Re: Need specs for 015-0221-00 DC block
Perfect--exactly what I needed. Thanks a lot! ? ?
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Re: Help I got a Tracking Generator for my Tek 2710 but how do I install it?
Hi,
I will check the cable type and find out the connectors !
May be Digikey has or possibly others... I will digg !
Herbert
Am 24.09.2012 05:59, schrieb dreadlk:
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?
Hi Herbert
Thanks, I had seen those numbers but I thought they would
have a corresponding long part number like the one I see
on Ebay and in the SV manual for other parts. I was
looking through the PDF for it but never found it, now I
know why LOL.
Thanks for the offer Herb I may take you up on it pretty
soon, maybe ask you instead for some photos if possible of
how yours are routed so I can see where to make the bends.
For now I think I can just estimate the amount I will need
and buy 25% extra just in case.
BTW any suggestions on a good online place to order the
parts? Digikey or is there some place better?
Thank you
Robert
--- In TekScopes@...,
Measurement wrote:
>
> Hi,
>
> the parts are named W52 and W53 and W55.
>
> - W55 is solder end to SMB
> - W52 SMA-male to N-female
> - W53 SMA-male to SMA-male
>
> Would it help, to know the length ???
> I can measure in mz 2712 !
>
> Herbert
>
>
> Am 23.09.2012 21:48, schrieb dreadlk:
> >
> > For starters I found this on ebay but it looks
too short.
> >
> >
> > <>
> >
> > I am scouring the 2712 SVC Manual looking for
the correct part number
> > but so far no luck, it is diagramed but the part
numbers are not
> > listed for any of the cables.
> >
> > --- In TekScopes@...
,
> > "dreadlk" wrote:
> > >
> > > Thanks for the information, I agree with
both of your assessments.
> > It was easy to find the Cables in a flex format
so I went out and
> > bought some on day one. Now that I read your
posts I know it won't
> > work and my dilemma is that I have no idea where
to find the Semi
> > Rigid versions. I am going to do some searching
but I have a feeling I
> > am going to need a lot of luck on my side to
make this happen. If the
> > unit will error out it makes little sense for me
to proceed further
> > until I locate these cables so at this point I
am going to mark out
> > the plate for cutting and drilling based on Jims
info and then when I
> > know where to get the needed cables I will start
the cutting and drilling.
> > >
> > > If anybody has any of these cables and is
willing to sell them
> > please let me know or if you have any ideas on a
source that might
> > sell them the info would be greatly appreciated.
> > >
> > > Robert
> > > KD8MJR
> > >
> > > --- In TekScopes@...
> > ,
"Rich Miller" wrote:
> > > >
> > > > Hello Robert:
> > > >
> > > >
> > > >
> > > > With regard to the rigid coax cable
used to connect the TG to the
> > front
> > > > panel, I think you are going to want
to use this. While at low
> > frequency
> > > > other types of cable may work fine,
when you get into microwave
> > you may run
> > > > into a problem with the TG Gain
Flatness Normalization. If the
> > output of the
> > > > TG is off by more than +/-3dBm (This
is from memory so double
> > check), it
> > > > will show up as a fault when you first
attempt to normalize.
> > > >
> > > >
> > > >
> > > > Rich, AJ3G
> > > >
> > > >
> > > >
> > > > From: TekScopes@...
> >
[mailto:TekScopes@...
> > ] On
Behalf
> > > > Of dreadlk
> > > > Sent: Friday, September 21, 2012 2:33
PM
> > > > To: TekScopes@...
> > > > Subject: [TekScopes] Re: Help I got a
Tracking Generator for my
> > Tek 2710 but
> > > > how do I install it?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Hi Jim
> > > >
> > > > Thank you so much for the reply. I do
have a VR BW board in that
> > cavity and
> > > > I received the TG with no cables at
all, I will have to figure out
> > how to
> > > > obtain the needed parts and where to
source them.
> > > > I was wondering if flexible cables
with SMA and Type N will work
> > or does it
> > > > have to be the rigid stuff? I obtained
a copy of the 2712 SV
> > Manual and am
> > > > going to look through it tonight to
try and get a better idea of
> > what I am
> > > > dealing with, I want to thank you for
your post, it certainly
> > clarified
> > > > things for me, I hope I am up to the
task of doing this Job as I
> > must admit
> > > > I am a bit worried about messing up my
2710 it has been absolutely a
> > > > pleasure to use over the years and is
in fantastic condition.
> > > >
> > > > Let me ask you Jim is there any chance
of having my proverbial
> > cake and
> > > > eating it too?
> > > > I mean could I leave in the VR BW
board and run cables to the Back
> > of the
> > > > unit and put the TG in a separate
enclosure, kind of like a DIY
> > 2707? I am
> > > > just wondering if anybody has ever
done that, I would imagine that
> > it might
> > > > not be practical but I just wanted to
get your opinion.
> > > >
> > > > Anyway Jim I am going to take out the
VR BW board and see what I
> > am dealing
> > > > with. If you have any suggestions
please post them, and thanks so
> > much for
> > > > your help.
> > > >
> > > > Robert
> > > > KD8MJR
> > > >
> > > > --- In TekScopes@...
> >
> > ,
> > > > "Jim" wrote:
> > > > >
> > > > >
> > > > >
> > > > > Hi Robert -
> > > > > The TG mounts in the cavity on
the left side of the analyzer.
> > This also is
> > > > the same cavity which houses the
Variable Resolution BW board. You
> > can only
> > > > use one or the other, not both. It
wasn't clear whether you have
> > the VR BW
> > > > board or not.
> > > > >
> > > > > There are two semi-rigid cables
that will need to be made. One
> > routes the
> > > > RF to the front panel and has an SMA
on one end and a Type N on
> > the other.
> > > > The other routes the 2nd LO (2 GHz) to
the TG. Did you receive
> > these cables?
> > > > The ribbon cable will plug into the
main power supply board to
> > provide the
> > > > interface. in fact, I just remembered
that one end of the ribbon
> > cable is
> > > > crimped to a IDC connector that is
*soldered* to the power supply
> > board. The
> > > > other end uses at typical IDC
connector that will plug into the
> > TG. The 2712
> > > > (not 2710) service manual has a block
diagram that will aide in
> > making the
> > > > necessary connections. This manual is
down loadable from the
> > Tek.com site
> > > > and will be a better reference for
what you are wanting to do. You
> > will have
> > > > some work to do to get your TG up and
running. Take your time and
> > it will go
> > > > smoothly.
> > > > >
> > > > > Good luck.
> > > > > Jim
> > > > > WB5KYE
> > > > >
> > > > >
> > > > > --- In TekScopes@...
> >
> > ,
> > > > "dreadlk" wrote:
> > > > > >
> > > > > > I posted about a month ago
about searching for an internal
> > tracking
> > > > generator for my 2710 SA and I finally
found one from an old Tektronix
> > > > dealer.
> > > > > >
> > > > > > Now I have this unit with Id
No 119-3889-07 it's in a golden
> > colored all
> > > > metal case with 3 female SMA
connectors and a 10 pin 2 row IDC
> > connector.
> > > > > >
> > > > > > Luckily I found several old
Mobo serial connectors that are
> > the right
> > > > size but only use 9 of the 10 pins so
I removed the wire and made
> > a 10 wire
> > > > straight pin to pin cable from the
connector ends.
> > > > > >
> > > > > > Now I open up my 2710 to
locate grounds and power pins on this IDC
> > > > connector and have a WTF moment. Where
the Heck does this thing go!! I
> > > > remember a side section that was free
but the unit won't fit and
> > all the
> > > > card slots are used up! Plus its just
too big, so I have no clue
> > how this
> > > > fits into a 2710.
> > > > > >
> > > > > > I can find nothing on the
net about this Option 04 tracking
> > generator,
> > > > it's not even listed in the 2710
service manual but I have seen
> > several 2710
> > > > sold with Tracking Gens built in and
the guy who sold it to me
> > told me it
> > > > works with the 2710 Arggggh....
> > > > > >
> > > > > > Anybody have any idea what I
should do next? I can't even
> > locate the 10
> > > > pin connector that it supposed to plug
into much less fit the unit
> > into my
> > > > 2710. Man I hope I did not waste all
that money, I am having
> > serious regrets
> > > > now. Sorry if this comes of as a Crazy
Rant but I should have done my
> > > > homework before making this purchase,
I am upset with myself.
> > > > > >
> > > > > > Robert
> > > > > > KD8MJR
> > > > > >
> > > > >
> > > >
> > >
> >
> >
>
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Re: TDS744A adjustment software needed
That's a good point, I forgot that it had to pass SPC before you could start calibration. I was thinking that the DC balance could be too far off for SPC to compensate, but that calibration might bring it into range. I plan to test each attenuator individually in case one of them is affecting the whole system.
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--- In TekScopes@..., "Hakan H" <hahi@...> wrote:
Seems like you have a bunch of bad attenuator hybrids.
I doubt that you would be able to run adjustment software
at all due to the errors. SPC is part of the sequence and
must pass to continue and if I recall correctly the program
will not start unless the error log is empty. I think maybe the
program was able to clear the error log, but the actual faults
will still there.
If you still want the software contact me off list for a copy.
/H?kan
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buz90a