[MRCA] T-195A more updates

[mac]

Bob,

 From my 1970 manual, TM 11-5820-335-35 there would appear to have  
been at least 5 different variants of the HV solid state power supply,  
A1200, A1200 (MOD 1), PS601, PS602 and a 5th version labeled merely  
"Transistor-type  high-voltage power supply."  When I see your  
pictures I may be able to identify and supply a schematic.

Dennis D.  W7QHO
Glendale, CA

************
On May 26, 2013, at 9:24 AM, Robert Newberry wrote:

> Well I kinda made heads and tails of what I had. I have a T-195A  
> with a good working LV SS power supply. I have a box with a bad LV  
> supply, and HV supply and also in the box there is a complete set of  
> parts for a second HV supply.
>
> I was able to hook up the HV  supply to a power supply, I observed  
> output (couldn't quite tell exactly but at least 500 volts maybe a  
> 1000.... things were happening fast!) I then saw smoke emanating  
> from a big resistor on the side. I immediately disconnected  
> everything and saw what looked like bad/burnt out resistor, it had a  
> crack in the material and the resistor was quite warm. I know that  
> before I hooked it up I inspected the supply and I did note the  
> physical condition on the resistor. I also noted the fan was not  
> sniping that I could tell too.
>
> Maybe I'm nuts but it looks like I should be able to fix this thing,  
> it doesn't appear to have any black magic installed into it.
>
> I'm going to check all of the components one at a time. I'm also  
> going to post pics at a later date of two things on this supply that  
> I'm not quite sure what they are.
>
> Hopefully I can get a working HV supply going, My plan is get the  
> T-195A going, then I'm going to attempt to repair the LV supply and  
> re-assemble the parts for the HV supply to have spares.
>
> I'm fully documenting things with video and pictures for later.
>
> -Bob/N1XBM
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