[Milsurplus] T-195A/GRC-19 Transmitter problem

[mac]

Joe,

This is a complex pice of equipment, remote diagnosis of problems is  
difficult.  First off, do you have documentation?  There are a couple  
of manuals available, one with an accompanying package of schematics  
and a later version with fold outs.  The test meter is a 25 ma unit  
and input voltage, PA grid and PA cathode current all read nominally  
at half scale in normal operation.  Originals are HARD to find, having  
slightly radioactive dials.

Good first line maintenance trick is to reseat all the connectors on  
the various internal modules in the set.

For a complete rundown on the T-195 see ER # 104, Dec. 1997.  If you  
would like I can send you a copy of the article and a DVD covering a  
lecture I gave on the T-195 at the 2001 MRCG meeting.

Dennis D.  W7QHO
Glendale, CA

******************

On Aug 1, 2009, at 12:14 PM, Joseph Pinner wrote:

> I have a new T-195A/GRC transmitter I am trying to put in operation.  
> This is complicated by the fact that, though reconditioned in 1984,  
> it came like so many, less meters.
>
> I am using a PP-7332/U power supply that puts out 29-30 V
>
> I have the output feeding a dummy load thru a Bird.
>
> I am monitoring the driver mA / input voltage / final mA with a mA  
> meter.
>
> Tuning cycle seems to function properly. However, at the end of the  
> cycle the red tune lamp does not come on as I believe it should.
>
> After I put it in the CW position. after 30-40 seconds there is a  
> noise (and brief dimming of dial lamps) which seems to indicate the  
> HV Inverter has come on.
>
> Whem I move the test lever to on, there seems to be proper driver mA  
> (guess).
> However, the final mA indication seems low and the input power  
> current most of the time does not exceed 20-25 Aand the most the  
> Bird will ever read is .1 W. Sometimes the red tunelamp comes on,  
> sometimes not. Sometimes it comes on briefly when I release the test  
> lever.
>
> Occasionally though, the power in current will go to 40 A, but still  
> no greater output than 1W on the Bird.