The gears are easy to print but you'll need an idler gear between the two or the knob will work backwards . That would entail some kind of holder between the shafts? Ian N6UH?
Have you checked out SDP/SI and robot parts suppliers for small gears?? On Apr 4, 2024, at 5:46?PM, Dave Jordan <wa3gin@...> wrote:
? I¡¯ll bet someone on here has a grandkid with a 3D Printer that would enjoy cranking out a few gears!
73 Dave On Thu, Apr 4, 2024 at 4:07?PM waltcates < cateswa@...> wrote:
SORRY that last one should have gone to the SR-2000 can't null carrier topic.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
I don't remember, and can not find It written down, what is the capacitance range of each section?
I have kind of lost track on this topic, but if you have not found an exact replacement, try some of the Collins sources. They used the exact same part.
?
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
?
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
That might work Don.
?
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.?
![]()
|
Have you checked out SDP/SI and robot parts suppliers for small gears??
toggle quoted message
Show quoted text
On Apr 4, 2024, at 5:46?PM, Dave Jordan <wa3gin@...> wrote:
? I¡¯ll bet someone on here has a grandkid with a 3D Printer that would enjoy cranking out a few gears!
73 Dave On Thu, Apr 4, 2024 at 4:07?PM waltcates < cateswa@...> wrote:
SORRY that last one should have gone to the SR-2000 can't null carrier topic.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
I don't remember, and can not find It written down, what is the capacitance range of each section?
I have kind of lost track on this topic, but if you have not found an exact replacement, try some of the Collins sources. They used the exact same part.
?
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
?
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
That might work Don.
?
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.?
![]()
|
I¡¯ll bet someone on here has a grandkid with a 3D Printer that would enjoy cranking out a few gears!
73 Dave
On Thu, Apr 4, 2024 at 4:07?PM waltcates < cateswa@...> wrote:
SORRY that last one should have gone to the SR-2000 can't null carrier topic.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
I don't remember, and can not find It written down, what is the capacitance range of each section?
I have kind of lost track on this topic, but if you have not found an exact replacement, try some of the Collins sources. They used the exact same part.
?
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
?
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
That might work Don.
?
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.?
![]()
|
SORRY that last one should have gone to the SR-2000 can't null carrier topic.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
toggle quoted message
Show quoted text
?
I don't remember, and can not find It written down, what is the capacitance range of each section?
I have kind of lost track on this topic, but if you have not found an exact replacement, try some of the Collins sources. They used the exact same part.
?
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
?
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
That might work Don.
?
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.?
|
Walt, Its an NPO 5 to 25PF trimmer.? I found them on ebay and ordered?them.? They are identical so I will be able to install it for a factory appearance.
C
toggle quoted message
Show quoted text
I don't remember, and can not find It written down, what is the capacitance range of each section?
I have kind of lost track on this topic, but if you have not found an exact replacement, try some of the Collins sources. They used the exact same part.
?
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
?
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
That might work Don.
?
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.?
|
I don't remember, and can not find It written down, what is the capacitance range of each section?
I have kind of lost track on this topic, but if you have not found an exact replacement, try some of the Collins sources. They used the exact same part.
toggle quoted message
Show quoted text
?
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
?
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
?
That might work Don.
?
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.?
|
Re: SR2000 Cant Null carrier
Oh, I think the line you see going across the rotor is the edge of the plating. Only half of the rotor and stator are plated. The stator is plated on the bottom. The rotor is plated on the inside surface. Sometimes you can clean the inside surfaces and restore
it.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
toggle quoted message
Show quoted text
Thanks C, ?I don¡¯t recall seeing one like this. Your pic gives me a much better idea about its construction.
I can just make out a line going across, almost thru the center, but I can¡¯t understand why
cracked mica
??would ¡°open¡± the capacitor; but it might short it out. ?
B
looks rusty?
The other ¡°plate¡± is connected to the screw somehow maybe, and then to some kind of terminal? Likely on the nut side?
GUESS? I have not learned much over the years.
?
The trimmer is cracked.? ?I could not see this with my eyes. But using my camera you can see the mica?? Layer cracked.??
--
don??? va3drl
|
Re: SR2000 Cant Null carrier
No.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
toggle quoted message
Show quoted text
Thanks C, ?I don¡¯t recall seeing one like this. Your pic gives me a much better idea about its construction.
I can just make out a line going across, almost thru the center, but I can¡¯t understand why
cracked mica
??would ¡°open¡± the capacitor; but it might short it out. ?
B
looks rusty?
The other ¡°plate¡± is connected to the screw somehow maybe, and then to some kind of terminal? Likely on the nut side?
GUESS? I have not learned much over the years.
?
The trimmer is cracked.? ?I could not see this with my eyes. But using my camera you can see the mica?? Layer cracked.??
--
don??? va3drl
|
Re: SR2000 Cant Null carrier
Thanks C, ?I don¡¯t recall seeing one like this. Your pic gives me a much better idea about its construction. I can just make out a line going across, almost thru the center, but I can¡¯t understand why cracked mica ??would ¡°open¡± the capacitor; but it might short it out. ?
B looks rusty? The other ¡°plate¡± is connected to the screw somehow maybe, and then to some kind of terminal? Likely on the nut side? GUESS? I have not learned much over the years.
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of W7WRX
Sent: Thursday, April 4, 2024 11:12 AM
To: [email protected]
Subject: Re: [HallicraftersRadios] 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.?? -- don??? va3drl
|
There is no room to move the cap to line up. It would stick out of the PA cabinet.? ?Any lower and it his the Tune cap. Its really tight in there Walt.? I will figure something out!? We must save this thing.
C
toggle quoted message
Show quoted text
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
That might work Don.
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.?
|
Have you looked at the possibility of moving the mounting holes of the U bracket the capacitor is mounted. Or making a new bracket to align the shafts.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
toggle quoted message
Show quoted text
That might work Don.
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.?
|
Re: 3 gang Variable cap needed
The ball bearings fell out.? That allowed all the plates to touch. Someone continued to operate it that way and burned up some plates.??
Even with new balls and adjustment of the end stop, all the plates are touching and kicked over.?
C
toggle quoted message
Show quoted text
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
|
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?
toggle quoted message
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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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
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-------- 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.?
|
Dave Jordan
waltcates
don Root
Robert Kembel
KN6WFM (Drew)