Re: 3 gang Variable cap needed
Did all the moveable plates shift sideways, causing the gap in one direction to be much smaller than the other?? If yes, can you momentarily make the gap even by tugging (hard) on the shaft?? I had this problem in an antenna tuner.
Halden VE7UTS
|
Are there any other models that use the same cap? I have a HT-37 complete that I will likely part out, as I can't find any one that pill pay $100 for it.
Maybe they use the same cap?
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Show quoted text
C, You are in a tough spot. It hurts. Here is my ?2 cents of hogwash on the topic.
If I had that situation, I would want to restore it:? beg for a real SR2000 cap , perhaps from a total basket case, or just maybe there are guys that know
how to rebuild the cap. Some people know how to fix stuff. It is way beyond me, but I think of guys that used to fix car fenders and such… way beyond my abilities. ?There are lots of radio groups on line, and there must be lots of caps bent out of shape. Wish
I knew how to reach them. ?
?
?
Even better, I like the idea of two small pulleys and either a dial cord or "o" ring ala Heathkit HW or SB series.
I would be happy to send you two small heathkit pulleys that fit a 1/4 in shaft if you would like.?
-------- Original message --------
Date: 4/4/24 11:42 AM (GMT-05:00)
Subject: Re: [HallicraftersRadios] SR2000 load cap
I already purchased the ball bearings and installed them into the race. The cap has warped plates and makes heavy contact.? There is no way I can think of to repair it. I spent hours attempting
to align them.? The entire assembly is kicked over and at least 10 plates rub. I may have to revisit this and see if I can somehow get this thing apart and try to repair it.??
I thought of gears and that was my first attempt.? Problem is, There is NO source for???inch bore gears.? I have searched for hours.? All websites.? The only ones I found are at McMaster Carr
and they have the wrong bore and are $30!! each.? I would need to get several sizes and maybe drill them but it would be hundreds of dollars for an experiment.
The only???inch shaft gears I did find are, get this, $70 to $200 each!!??
There is probably something I can find and repurpose for a reasonable price. I am still looking.
Thought I would add my 2 cents worth...
Since it looks like there is a shaft extender on the cap, that does give you a little bit of room to work with.
If it were me, I would look for a solution using some small nylon gears. If you use 2 gears, you are right, the cap will work backwards. If, you add an idler gear between the gears (3 gear solution), the cap will rotate in the correct
direction. Use the gears with the same number of teeth on the front panel shaft and the capacitor shaft to keep the rotation the same. The number of teeth on the idler gear doesn't matter as long as the mesh with the other gears is good.
Also, on rebuilding the original cap. A few years back, I picked up a ball-bearing assortment to use if I ever needed to repair an existing cap (probably from Amazon). Fortunately, this was not necessary for me, so I can't comment on
the success potential.
On 4/3/2024 11:18 PM, Scott Petersen wrote:
I've seen this done with a rubber or vinyl hose as a coupler also.
I’m with Tom.? Use shorter shafts at both ends and use a flex coupler. ?
?
On Wed, Apr 3, 2024 at 8:16?PM W7WRX <clark@...> wrote:
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
?
?
--
don??? va3drl
|
C, You are in a tough spot. It hurts. Here is my ?2 cents of hogwash on the topic. If I had that situation, I would want to restore it:? beg for a real SR2000 cap , perhaps from a total basket case, or just maybe there are guys that know how to rebuild the cap. Some people know how to fix stuff. It is way beyond me, but I think of guys that used to fix car fenders and such… way beyond my abilities. ?There are lots of radio groups on line, and there must be lots of caps bent out of shape. Wish I knew how to reach them. ? ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Robert Kembel
Sent: Thursday, April 4, 2024 1:51 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] SR2000 load cap? Even better, I like the idea of two small pulleys and either a dial cord or "o" ring ala Heathkit HW or SB series. I would be happy to send you two small heathkit pulleys that fit a 1/4 in shaft if you would like.? -------- Original message -------- Date: 4/4/24 11:42 AM (GMT-05:00) Subject: Re: [HallicraftersRadios] SR2000 load cap I already purchased the ball bearings and installed them into the race. The cap has warped plates and makes heavy contact.? There is no way I can think of to repair it. I spent hours attempting to align them.? The entire assembly is kicked over and at least 10 plates rub. I may have to revisit this and see if I can somehow get this thing apart and try to repair it.?? I thought of gears and that was my first attempt.? Problem is, There is NO source for???inch bore gears.? I have searched for hours.? All websites.? The only ones I found are at McMaster Carr and they have the wrong bore and are $30!! each.? I would need to get several sizes and maybe drill them but it would be hundreds of dollars for an experiment. The only???inch shaft gears I did find are, get this, $70 to $200 each!!?? There is probably something I can find and repurpose for a reasonable price. I am still looking.
Thought I would add my 2 cents worth... Since it looks like there is a shaft extender on the cap, that does give you a little bit of room to work with. If it were me, I would look for a solution using some small nylon gears. If you use 2 gears, you are right, the cap will work backwards. If, you add an idler gear between the gears (3 gear solution), the cap will rotate in the correct direction. Use the gears with the same number of teeth on the front panel shaft and the capacitor shaft to keep the rotation the same. The number of teeth on the idler gear doesn't matter as long as the mesh with the other gears is good. Also, on rebuilding the original cap. A few years back, I picked up a ball-bearing assortment to use if I ever needed to repair an existing cap (probably from Amazon). Fortunately, this was not necessary for me, so I can't comment on the success potential. On 4/3/2024 11:18 PM, Scott Petersen wrote: I've seen this done with a rubber or vinyl hose as a coupler also.
I’m with Tom.? Use shorter shafts at both ends and use a flex coupler. ? ? On Wed, Apr 3, 2024 at 8:16?PM W7WRX <clark@...> wrote: I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
? ? -- don??? va3drl
|
Do you know anyone with a 3D printer that could print you some gears?
Tom W3TA
On Thursday, April 4, 2024 at 11:42:06 AM EDT, W7WRX <clark@...> wrote:
Thanks Bob.??
I already purchased the ball bearings and installed them into the race. The cap has warped plates and makes heavy contact.? There is no way I can think of to repair it. I spent hours attempting to align them.? The entire assembly is kicked over and at least
10 plates rub. I may have to revisit this and see if I can somehow get this thing apart and try to repair it.??
I thought of gears and that was my first attempt.? Problem is, There is NO source for???inch bore gears.? I have searched for hours.? All websites.? The only ones I found are at McMaster Carr and they have the wrong bore and are $30!! each.? I would need to
get several sizes and maybe drill them but it would be hundreds of dollars for an experiment.
The only???inch shaft gears I did find are, get this, $70 to $200 each!!??
There is probably something I can find and repurpose for a reasonable price. I am still looking.
C
Good Morning,
Thought I would add my 2 cents worth...
Since it looks like there is a shaft extender on the cap, that does give you a little bit of room to work with.
If it were me, I would look for a solution using some small nylon gears. If you use 2 gears, you are right, the cap will work backwards. If, you add an idler gear between the gears (3 gear solution), the cap will rotate in the
correct direction. Use the gears with the same number of teeth on the front panel shaft and the capacitor shaft to keep the rotation the same. The number of teeth on the idler gear doesn't matter as long as the mesh with the other gears is good.
Also, on rebuilding the original cap. A few years back, I picked up a ball-bearing assortment to use if I ever needed to repair an existing cap (probably from Amazon). Fortunately, this was not necessary for me, so I can't comment
on the success potential.
Bob,? K7DYB
On 4/3/2024 11:18 PM, Scott Petersen wrote:
I've seen this done with a rubber or vinyl hose as a coupler also.
I’m with Tom.? Use shorter shafts at both ends and use a flex coupler. ?
On Wed, Apr 3, 2024 at 8:16?PM W7WRX < clark@...> wrote:
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Even better, I like the idea of two small pulleys and either a dial cord or "o" ring ala Heathkit HW or SB series.
I would be happy to send you two small heathkit pulleys that fit a 1/4 in shaft if you would like.?
Bob? k7dyb
toggle quoted message
Show quoted text
-------- Original message -------- From: W7WRX <clark@...> Date: 4/4/24 11:42 AM (GMT-05:00) Subject: Re: [HallicraftersRadios] SR2000 load cap
Thanks Bob.??
I already purchased the ball bearings and installed them into the race. The cap has warped plates and makes heavy contact.? There is no way I can think of to repair it. I spent hours attempting to align them.? The entire assembly is kicked over and at least
10 plates rub. I may have to revisit this and see if I can somehow get this thing apart and try to repair it.??
I thought of gears and that was my first attempt.? Problem is, There is NO source for???inch bore gears.? I have searched for hours.? All websites.? The only ones I found are at McMaster Carr and they have the wrong bore and are $30!! each.? I would need to
get several sizes and maybe drill them but it would be hundreds of dollars for an experiment.
The only???inch shaft gears I did find are, get this, $70 to $200 each!!??
There is probably something I can find and repurpose for a reasonable price. I am still looking.
C
Good Morning,
Thought I would add my 2 cents worth...
Since it looks like there is a shaft extender on the cap, that does give you a little bit of room to work with.
If it were me, I would look for a solution using some small nylon gears. If you use 2 gears, you are right, the cap will work backwards. If, you add an idler gear between the gears (3 gear solution), the cap will rotate in the
correct direction. Use the gears with the same number of teeth on the front panel shaft and the capacitor shaft to keep the rotation the same. The number of teeth on the idler gear doesn't matter as long as the mesh with the other gears is good.
Also, on rebuilding the original cap. A few years back, I picked up a ball-bearing assortment to use if I ever needed to repair an existing cap (probably from Amazon). Fortunately, this was not necessary for me, so I can't comment
on the success potential.
Bob,? K7DYB
On 4/3/2024 11:18 PM, Scott Petersen wrote:
I've seen this done with a rubber or vinyl hose as a coupler also.
I’m with Tom.? Use shorter shafts at both ends and use a flex coupler. ?
On Wed, Apr 3, 2024 at 8:16?PM W7WRX < clark@...> wrote:
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Re: Sx100 question on 50.5 kc alignment
Good choice in VTVMs, and the input probe mod. I like the Heathkit VTVM "DSB" line, in fact I was looking for an IM-28 when I was shopping for a VTVM. BTW...?Bob Eckweiler (AF6C)?wrote a very informative review/manual on the Heathkit VTVM line. I can send it directly to you if you wish, or just Google it. I ended up going with the "Simpson 312" VTVM because it has huge meter face, the needle swing is 7.5 inches. Talk about sensitivity.? Beside, Simpson has been making meters forever, so they should know what they are doing and parts are plentiful. ?-Drew? ? ? ?
On Thursday, April 4, 2024 at 07:55:43 AM PDT, Keith <kd4avp@...> wrote:
My vtvm is an old heathkit im-18
I changed the 1/4 inch phone jack to bnc since most of my stuff is either bnc or banana plugs
|
Re: Sx100 question on 50.5 kc alignment
Your Heathkit IG-5282 audio signal generator is very basic with limited attenuation ability. Suggest you read Phil’s Old Radios post at about “Aligning the Receiver” for a Hallicrafters with a 50 kHz IF. ?His audio generator put out such a large signal that he observed a -50 volts at Test Point B! His solution was a potentiometer to reduce the generator output to a more manageable level. Don’t forget an isolation capacitor (say 0.05 mfd.) between your signal generator with the added attenuation pot (say 500 K ohm) and Test Point A (terminal 1 on T2 not T1).
|
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How about a piece of 1/2 plastic rod, drill a 1/4" hole down the middle, slice off a couple sections and sleeve them on to the two shafts. Then run an O ring as a belt like Heathkit did on the HW 101?
Don ve3ids?
On Thu., Apr. 4, 2024, 11:43 a.m. W7WRX, < clark@...> wrote:
NO???inch.? They would have to be machined out.? Also NO double joints. So I would have to run two back-to-back to make the JOG. Remember, the shaft is 1 inch DOWN and about an inch OVER.? If I had those in hand I might be able to make something work tho!
C
How about these? You would still need your insulated coupling in the string.?
C$2.83? 70%OFF | Rc Boat Car Metal Cardan Joint 2mm/2.3mm/3mm/3.175mm/4mm/5mm/6mm/8mm Gimbal Couplings Shaft Motor Connector Universal Joint
73 Don ve3ids?
On Thu., Apr. 4, 2024, 11:03 a.m. Dave Jordan, < wa3gin@...> wrote:
Hamfest season is coming!? Maybe with luck someone has what you need.? An alternative would?be to take a page from the ALPHA78 design and install a few fixed variable caps for a couple of your favorite bands and mount the switch for those on
the load control shaft until you find the exact replacement cap.? Should be enough room in the final cage for a switch and a couple of caps. I'll keep my eyes open for that air variable load cap.? ?73 dave
On Thu, Apr 4, 2024 at 10:52?AM W7WRX < clark@...> wrote:
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
How about a piece of 1/2 plastic rod, drill a 1/4" hole down the middle, slice off a couple sections and sleeve them on to the two shafts. Then run an O ring as a belt like Heathkit did on the HW 101?
Don ve3ids?
On Thu., Apr. 4, 2024, 11:43 a.m. W7WRX, < clark@...> wrote:
NO???inch.? They would have to be machined out.? Also NO double joints. So I would have to run two back-to-back to make the JOG. Remember, the shaft is 1 inch DOWN and about an inch OVER.? If I had those in hand I might be able to make something work tho!
C
How about these? You would still need your insulated coupling in the string.?
C$2.83? 70%OFF | Rc Boat Car Metal Cardan Joint 2mm/2.3mm/3mm/3.175mm/4mm/5mm/6mm/8mm Gimbal Couplings Shaft Motor Connector Universal Joint
73 Don ve3ids?
On Thu., Apr. 4, 2024, 11:03 a.m. Dave Jordan, < wa3gin@...> wrote:
Hamfest season is coming!? Maybe with luck someone has what you need.? An alternative would?be to take a page from the ALPHA78 design and install a few fixed variable caps for a couple of your favorite bands and mount the switch for those on
the load control shaft until you find the exact replacement cap.? Should be enough room in the final cage for a switch and a couple of caps. I'll keep my eyes open for that air variable load cap.? ?73 dave
On Thu, Apr 4, 2024 at 10:52?AM W7WRX < clark@...> wrote:
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
NO???inch.? They would have to be machined out.? Also NO double joints. So I would have to run two back-to-back to make the JOG. Remember, the shaft is 1 inch DOWN and about an inch OVER.? If I had those in hand I might be able to make something work tho!
C
toggle quoted message
Show quoted text
How about these? You would still need your insulated coupling in the string.?
C$2.83? 70%OFF | Rc Boat Car Metal Cardan Joint 2mm/2.3mm/3mm/3.175mm/4mm/5mm/6mm/8mm Gimbal Couplings Shaft Motor Connector Universal Joint
73 Don ve3ids?
On Thu., Apr. 4, 2024, 11:03 a.m. Dave Jordan, < wa3gin@...> wrote:
Hamfest season is coming!? Maybe with luck someone has what you need.? An alternative would?be to take a page from the ALPHA78 design and install a few fixed variable caps for a couple of your favorite bands and mount the switch for those on
the load control shaft until you find the exact replacement cap.? Should be enough room in the final cage for a switch and a couple of caps. I'll keep my eyes open for that air variable load cap.? ?73 dave
On Thu, Apr 4, 2024 at 10:52?AM W7WRX < clark@...> wrote:
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Thanks Bob.??
I already purchased the ball bearings and installed them into the race. The cap has warped plates and makes heavy contact.? There is no way I can think of to repair it. I spent hours attempting to align them.? The entire assembly is kicked over and at least
10 plates rub. I may have to revisit this and see if I can somehow get this thing apart and try to repair it.??
I thought of gears and that was my first attempt.? Problem is, There is NO source for???inch bore gears.? I have searched for hours.? All websites.? The only ones I found are at McMaster Carr and they have the wrong bore and are $30!! each.? I would need to
get several sizes and maybe drill them but it would be hundreds of dollars for an experiment.
The only???inch shaft gears I did find are, get this, $70 to $200 each!!??
There is probably something I can find and repurpose for a reasonable price. I am still looking.
C
toggle quoted message
Show quoted text
Good Morning,
Thought I would add my 2 cents worth...
Since it looks like there is a shaft extender on the cap, that does give you a little bit of room to work with.
If it were me, I would look for a solution using some small nylon gears. If you use 2 gears, you are right, the cap will work backwards. If, you add an idler gear between the gears (3 gear solution), the cap will rotate in the
correct direction. Use the gears with the same number of teeth on the front panel shaft and the capacitor shaft to keep the rotation the same. The number of teeth on the idler gear doesn't matter as long as the mesh with the other gears is good.
Also, on rebuilding the original cap. A few years back, I picked up a ball-bearing assortment to use if I ever needed to repair an existing cap (probably from Amazon). Fortunately, this was not necessary for me, so I can't comment
on the success potential.
Bob,? K7DYB
On 4/3/2024 11:18 PM, Scott Petersen wrote:
I've seen this done with a rubber or vinyl hose as a coupler also.
I’m with Tom.? Use shorter shafts at both ends and use a flex coupler. ?
On Wed, Apr 3, 2024 at 8:16?PM W7WRX < clark@...> wrote:
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
How about these? You would still need your insulated coupling in the string.?
C$2.83? 70%OFF | Rc Boat Car Metal Cardan Joint 2mm/2.3mm/3mm/3.175mm/4mm/5mm/6mm/8mm Gimbal Couplings Shaft Motor Connector Universal Joint
73 Don ve3ids?
On Thu., Apr. 4, 2024, 11:03 a.m. Dave Jordan, < wa3gin@...> wrote: Hamfest season is coming!? Maybe with luck someone has what you need.? An alternative would?be to take a page from the ALPHA78 design and install a few fixed variable caps for a couple of your favorite bands and mount the switch for those on the load control shaft until you find the exact replacement cap.? Should be enough room in the final cage for a switch and a couple of caps. I'll keep my eyes open for that air variable load cap.? ?73 dave
On Thu, Apr 4, 2024 at 10:52?AM W7WRX < clark@...> wrote:
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Good Morning,
Thought I would add my 2 cents worth...
Since it looks like there is a shaft
extender on the cap, that does give you a little bit of room to
work with.
If it were me, I would look for a
solution using some small nylon gears. If you use 2 gears, you are
right, the cap will work backwards. If, you add an idler gear
between the gears (3 gear solution), the cap will rotate in the
correct direction. Use the gears with the same number of teeth on
the front panel shaft and the capacitor shaft to keep the rotation
the same. The number of teeth on the idler gear doesn't matter as
long as the mesh with the other gears is good.
Also, on rebuilding the original cap. A
few years back, I picked up a ball-bearing assortment to use if I
ever needed to repair an existing cap (probably from Amazon).
Fortunately, this was not necessary for me, so I can't comment on
the success potential.
Bob,? K7DYB
On 4/3/2024 11:18 PM, Scott Petersen
wrote:
toggle quoted message
Show quoted text
I've seen this done with a rubber or vinyl hose as a coupler
also.
I’m with Tom.? Use shorter shafts at both ends
and use a flex coupler. ?
On Wed, Apr 3, 2024 at
8:16?PM W7WRX < clark@...>
wrote:
I am now three caps in.? None fit.? This one fits but
shafts do not line up.? This must have Been a custom order
cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially
over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Re: SR2000 Cant Null carrier
The trimmer is cracked.? ?I could not see this with my eyes. But using my camera you can see the mica?? Layer cracked.??
|
Hamfest season is coming!? Maybe with luck someone has what you need.? An alternative would?be to take a page from the ALPHA78 design and install a few fixed variable caps for a couple of your favorite bands and mount the switch for those on the load control shaft until you find the exact replacement cap.? Should be enough room in the final cage for a switch and a couple of caps. I'll keep my eyes open for that air variable load cap.? ?73 dave
On Thu, Apr 4, 2024 at 10:52?AM W7WRX < clark@...> wrote:
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Do you have room for a couple of these with a small 1/4 shaft connecting 2 back to back?
From Amazon. There are several different styles available. Search under motor drive couplings
Ian N6UH
On Thu, Apr 4, 2024 at 10:52?AM W7WRX < clark@...> wrote:
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Re: Sx100 question on 50.5 kc alignment
My vtvm is an old heathkit im-18
I changed the 1/4 inch phone jack to bnc since most of my stuff is either bnc or banana plugs
|
I went down that road. Can't find one online. I would need a double joint 1/4 inch.? That might be possible if I could find some parts.
Possibly a flexible coupling shaft or maybe you can rig up a shaft with a universal joint in it?
?
Tom
W3TA
toggle quoted message
Show quoted text
From: [email protected] < [email protected]>
On Behalf Of W7WRX
Sent: Wednesday, April 3, 2024 8:17 PM
To: [email protected]
Subject: [HallicraftersRadios] SR2000 load cap
?
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
|
Re: Sx100 question on 50.5 kc alignment
If you use your probe at x1 then there is a greater chance that you will load the signal down because the probe has lower impedance (usually 1M ohm), and you'll make an error in the measurement. However, the same probe in x10 mode will have less of an impact on your signal because the impedance, will be 10M Ohm. You definitely want to use it in x10 position, and in doing so, the scale on the oscilloscope channel will change by x10. If you're using a scope that can sense and recognize a x10 probe, then it will usually? automatically change the scale for you. In my case, my Tekronix 465 does not recognize a x10 probe. However, the channel scale dial does have an indicator for 1x & x10 scale position pointers. I just have to remember to use the correct pointer, or just multiply the scale by 10.? ? What VTVM do you have?? ?
On Wednesday, April 3, 2024 at 05:57:07 PM PDT, Keith <kd4avp@...> wrote:
Those that have more experience with testing these points in the SX100 or any other radio that normally uses a VTVM to check DC voltage.....can I do this with my oscilloscope?
My probe is a 1x & 10x. Could I not use it at 1x to measure this voltage coming off test point B in the SX100?
Looking to get around 1 vdc here when tuning the 50.5 IFs.
If I am thinking wrong, please let me know.
Just thinking this would be more stable than my vtvm.
|
? Mark, I talk to some friends most days on 3950. We vacate at 8am due to another net that starts at 8am on 3952. They start regardless if we're still there on 3950 or not. 99% of the time we're gone at 8am but once in a while we need an additional 30 seconds to finish something. That happened this morning. Those guys didn't care and started at 3952 so they QRMed us on 3950 We only?needed an additional 30 fuckin' seconds! And get this, it's some fuckin' prayer net. So they're all into prayer and god but still purposely QRM others. BTW as you know, it's against?FCC rules!
I sent the net control an email (not the first time BTW). Here's a copy of it...
?? Good morning Bruce, Mark,
I'm from the group on 3950. I was wondering why you guys can't give us just 30 seconds for us to finish something? You guys seem to start at 12:00Z regardless if it will QRM anyone. Why? 99% of the time we make sure we vacate 3950 at 12:00Z/8:00am eastern but once in a while we need a few extra seconds. Since we do our best to show you some consideration, how about a little in return?
How about it guys?
On Wed, Apr 3, 2024 at 11:18?PM Scott Petersen < s-petersen@...> wrote:
I've seen this done with a rubber or vinyl hose as a coupler also.
I’m with Tom.? Use shorter shafts at both ends and use a flex coupler. ?
On Wed, Apr 3, 2024 at 8:16?PM W7WRX < clark@...> wrote:
I am now three caps in.? None fit.? This one fits but shafts do not line up.? This must have Been a custom order cap for hallicrafters.??
Anyone got any ideas now?? Looking for a cap is officially over.? Now unfortunately we must modify the radio.
If I use gears, knob rotation will be backwards.?
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don Root
Robert Kembel
KN6WFM (Drew)
Don VE3IDS
Dave Jordan
Bob