Thanks
Lou
:I bought a Heathkit AG-10 sine/square wave generator at a flea sale. Doing a VARIAC check, it was pretty clear that the Voltage doubler had problems, so I assumed that the caps in the bridge were bad, which they were. Having succeded rebuilding one cap, I ordered the 50 uFd. caps (47, really, but what the heck?) When I opened the can, out fell an orange cardboard wrapped cap marked 50 uFd. @ 300 Volts. Huh? I unwrapped the orange cardboard, and inside were two caps in series, with a lead coming out of the edge of the cardboard, which is a transformer lead. I don't know exactly what I was expecting to be inside the cap, but it surely wasn't another cap. Anyway, I'm on the road with my new toy, keep you informed if anything else odd happens.
:Lewis
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Lou:
The original cap in the AG-10 (with the cap inside a cap) was made by the Industrial Capacitor Corp. Of Chicago, stamped 25-58, meaning, I assume the summer of 1958. The replacements I obtained form B. G. Micro web site are 47uFd. @450 Volts, and made by "nichicon", whoever they are, obviouly Oriental manufacture, are smaller and will fit in the old can easily, work good, last a long time, I hope.
Lewis
:
:
::I bought a Heathkit AG-10 sine/square wave generator at a flea sale. Doing a VARIAC check, it was pretty clear that the Voltage doubler had problems, so I assumed that the caps in the bridge were bad, which they were. Having succeded rebuilding one cap, I ordered the 50 uFd. caps (47, really, but what the heck?) When I opened the can, out fell an orange cardboard wrapped cap marked 50 uFd. @ 300 Volts. Huh? I unwrapped the orange cardboard, and inside were two caps in series, with a lead coming out of the edge of the cardboard, which is a transformer lead. I don't know exactly what I was expecting to be inside the cap, but it surely wasn't another cap. Anyway, I'm on the road with my new toy, keep you informed if anything else odd happens.
::Lewis
::
:
:
Well, gang, I put the new Voltage doubler caps in the old can and epoxyed it back together, and it looks like the original until you look too close. I put it on a VARIAC and slowly turned up the Voltage to form the caps, unitl I got to 130 Volts in, and left it there for over an hour without anything exploding. So now I have an audio signal generator, just about laboratory quality. A lettle more money spent on E-bay, and I shall be the Hi-Fi and stereo Man!!
Lewis
I got some of my test equipment in much the same manner. Flak market/yard sale/ham radio sale. Small fixes and they were up and running again.
Lou
::Who did you order the caps from? Who made the caps?
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:::Thanks
:::Lou
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::Lou:
::The original cap in the AG-10 (with the cap inside a cap) was made by the Industrial Capacitor Corp. Of Chicago, stamped 25-58, meaning, I assume the summer of 1958. The replacements I obtained form B. G. Micro web site are 47uFd. @450 Volts, and made by "nichicon", whoever they are, obviouly Oriental manufacture, are smaller and will fit in the old can easily, work good, last a long time, I hope.
::Lewis
:::
:::
::::I bought a Heathkit AG-10 sine/square wave generator at a flea sale. Doing a VARIAC check, it was pretty clear that the Voltage doubler had problems, so I assumed that the caps in the bridge were bad, which they were. Having succeded rebuilding one cap, I ordered the 50 uFd. caps (47, really, but what the heck?) When I opened the can, out fell an orange cardboard wrapped cap marked 50 uFd. @ 300 Volts. Huh? I unwrapped the orange cardboard, and inside were two caps in series, with a lead coming out of the edge of the cardboard, which is a transformer lead. I don't know exactly what I was expecting to be inside the cap, but it surely wasn't another cap. Anyway, I'm on the road with my new toy, keep you informed if anything else odd happens.
::::Lewis
:
:
:
:
:
:Well, gang, I put the new Voltage doubler caps in the old can and epoxyed it back together, and it looks like the original until you look too close. I put it on a VARIAC and slowly turned up the Voltage to form the caps, unitl I got to 130 Volts in, and left it there for over an hour without anything exploding. So now I have an audio signal generator, just about laboratory quality. A lettle more money spent on E-bay, and I shall be the Hi-Fi and stereo Man!!
:Lewis
: