The schematic shows the buffer cap to be C21, a .02 MfD capacitor rated at least 1600 volts DC and is most likely connected to socket pin 6 or 1 of the 6X4 rectifier to chassis/ground. Also may want to check R20 and R21 connected from pins 2 and 3 of the vibrator socket to chassis/ground. Schematic shows them to be 56 Ohms. Of course the power supply filter capacitors need to be in good shape as well as all the 'paper' capacitors in the radio.

Clifton

: Norm...thanks for the reply...I have a schematic for this radio, but I am still not sure where this buffer cap is located...anything descriptive to the whereabouts of it's location would be appreciated...Bob
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:: Be sure you replace the buffer cap with one of same value and rated 1600 volts. If this cap is bad vibrator points will burn.
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:: Don't know your specific radio but most 4 pin, 6 volt vibrators are interchangeable.
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:: Hard to adjust contacts in a vibrator. It can be done but usually ends up being mechanically noisier than a new vibrator. Use a points file to shape contacts. Do not use sandpaper. Particles can/will get stuck between points.
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::Norm
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:::All...I am a tinkerer working on my 6v positive ground '55 Ford radio. I got it to work using tubes and vibrators from the radio in the car, plus 2 parts radios...it played good for about 6 months and then quit. I took the Superior S-1 6v Base Diag A by Radiart Corp. apart and found the points burned-up. I tried swapping points from another vibrator and it works; but poorly; sound is intermittent and scratchy.
:::I'd like to get another vibrator, but I don't seem to find any with this naming convention available. Might anyone know a cross-reference # for another brand, or know where I might find one like the one I have? Thanks in advance...Bob
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