Found recently is a badly stripped Unholtz-Dickie 'shaker' amplifier. I am told by the strippers that it had a pair of 4-1000's. It ran on 3-phase power and used six 866's and two smaller MV rectifiers. It also used four EL34's as drivers. One person said the drive was to the 4-1000 screen grids from the EL34's.
Unfortunately the only components left are the chassis a massive vetical frame, the front and back covers (also cover the sides), the precious output transformer, and the 4-1000 tubes.
All the rest, the wiring, other iron, other tubes, a "phenolic circuit board" as said by the stripper, the tubes sockets were on, the 4-1000 sockets, the meter panel, etc are gone. Probably never to be seen again.
All is not lost. With the OPT in good cond., the 4-1000's,which I am familiar with for RF, and a donated plate transformer of 7500VCT @ 3.75KVA, I think this can be put back together so it looks nice and works fine.
Because so much is missing,it will be like the six million dollar man.. I would like to make it as much like the original in performance as possible.
There is an Unholtz-Dickie amp with 4-400's featured on youtube. I think this one is basically the same.
So, why not try to put it back in operation with new insides. It would look nice on casters in my living room.
So the begging goes out for the manual or schematic for one of these. Unfortunately there's no nameplate, so I can't even name the model.
I've done a resurrection like this before, but on a home-made 1KW AM transmitter found in a scrap yard. The reason I want a schematic is to better see how the drive was done.
Thank you!
PJ
Unfortunately the only components left are the chassis a massive vetical frame, the front and back covers (also cover the sides), the precious output transformer, and the 4-1000 tubes.
All the rest, the wiring, other iron, other tubes, a "phenolic circuit board" as said by the stripper, the tubes sockets were on, the 4-1000 sockets, the meter panel, etc are gone. Probably never to be seen again.
All is not lost. With the OPT in good cond., the 4-1000's,which I am familiar with for RF, and a donated plate transformer of 7500VCT @ 3.75KVA, I think this can be put back together so it looks nice and works fine.
Because so much is missing,it will be like the six million dollar man.. I would like to make it as much like the original in performance as possible.
There is an Unholtz-Dickie amp with 4-400's featured on youtube. I think this one is basically the same.
So, why not try to put it back in operation with new insides. It would look nice on casters in my living room.
So the begging goes out for the manual or schematic for one of these. Unfortunately there's no nameplate, so I can't even name the model.
I've done a resurrection like this before, but on a home-made 1KW AM transmitter found in a scrap yard. The reason I want a schematic is to better see how the drive was done.
Thank you!
PJ
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