TPU Clues

[BEP]

You folks actually believe that is a resistor?

Granted, that type of case is not common now but it and the layout of the color bands was still common in the 80's.

It is not a resistor. It is a diode. Even without knowing the colors I can tell you it is either a 1N9x series diode or a varactor. These were common in VHF circuits.

[kooler]

didnt mean to fluff any feathers but the reason i thought it was a inductor.. is they used to use
Parasitic Suppressor chokes in VHF circuits also, the ones that look like a resistor but has a lump in the middle..
i'm just looking for any clues so i can start the build soon...

[BEP]

No feathers fluffed here 

I just hate to see folks thinking something so wrong and trying to work with it.

I could be wrong about the diode type but it is certainly no resistor.

[wattsup]

@BEP

Thanks. I think you are very right that it is not a resistor cause that would make it a standard bleed resistor on a cap. Why would you want to bleed juice in a device that is trying to make juice? But the two black caps are in series, so what would a diode do over each cap in series?

[BEP]

@BEP

Thanks. I think you are very right that it is not a resistor cause that would make it a standard bleed resistor on a cap. Why would you want to bleed juice in a device that is trying to make juice? But the two black caps are in series, so what would a diode do over each cap in series?

From what I can tell each diode is used as a rectifier to charge the caps. This should be a simple power supply for the central circuits. One problem, the diodes seem to be reversed for that purpose. If so, he was using silicon diodes and their weird ability to pass very short spikes under reverse bias. Those spikes have single digit ns cutoff times.

I forgot the different names given to that action. I'll look them up and post later.
I am very sure these caps and diodes were not part of the load circuit.