[GreenKeys] Mystery rectifier

[W9DDD]

You guys, gave me some good laughs.  I'm old enough remember the stench 
of a both failures.  Letting the smoke out of the newer stuff just 
doesn't compare.

The base plate has a wrinkle green paint that doesn't quite match the 
Teletype GA finish.  So I don't think it was home brew.  I didn't notice 
a name plate, but the mission was getting the RO going and it was just 
in the way.  The RO received a test message via a Volpe board from a 
laptop. So that ended the restore session for the day.

That transformer looks big enough to supply 400=500 ma at 120VDC, so 
saving that is probably worth while.

John, W9DDD

On 11/15/2018 12:55 PM, groupsrichart at gmail.com wrote:
> Looks like a homebrew loop power supply. The electrolytic caps are 
> probably toast and those selenium rectifiers are really nasty when they 
> fail. The only things worth salvaging are the power transformer and the 
> wirewound resistor with the sliding tap that was used to set the loop 
> current.
> 
> Tim WS4V
> 
> On 11/15/2018 1:45 PM, W9DDD wrote:
>> Anyone recognize this?  Kind of WU flavor?
>>
>> https://www.tapr.org/images/mystery-ps-sm.jpg
>>
>> Probably goes to land fill unless someone has a need.  Was bolted in 
>> the bottom of 28KSR cabinet but wasn't "active".  No other indications 
>> of WU on this RO.
>>
>> One of the other KSRs has a WU ESU, any pointers for a WD on it? 
>> Haven't dug into this one far enough to look for name plates.
>>
>>
>