[TMC] TMC GPR92

[Richard Knoppow]

    The idea of using a Variac to "bring the voltage up slowly" 
is rather misleading. What you need is a way to tell if the item 
begins to draw excessive current right away and be able to shut 
it off. A "dim bulb" tester is a better way. A google search will 
find how to make one. In general a hand close to the power switch 
or plug will do as well.  Its likely the thing works just fine. I 
think the GPR-92 has a solid state power supply, a little less 
forgiving than a tube supply but tube supplies start delivering 
current pretty fast. I am not sure if its properly fused but I 
think a handbook is available on line. The filter capacitors will 
reform if its just left running for a couple of days. If it were 
mine my curiosity would have the better of me and it would 
dominate me until I had played with it and probably aligned it.

On 3/22/2021 11:01 AM, Doug Cooper wrote:
> I have one. Genealogy is one of my other hobbies. 25 years ago I went to visit a lost cousin in NJ. Her husband learning of my interest in ham radio said I have something I will give you . Turns out he had retired from the NSA AND THEY HAD BOUGHT THE GPR92 for a special project and after it was finished he inherited it. I brought it home and put  it on a shelf and had no idea if it’s value. It was many years later I learned of its rarity. It is serial number 20095. I hv never plugged it up. I need to put it on a variac and try it.
>
> Sent from my iPhone
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL