Hello, everyone.

 

I think I'm becoming more and more convinced that something might be going
wrong with the trusty Astron RS35 linear power supply that I have been using
here in the home shack for the past 18 years.

 

Today, I had my XYL check the meters on the supply when keying up in RTTY
mode with 100 watts with my TS590, and the meters on the supply read 14
volts, with only a draw of 11 amps.  I did this on a frequency for which my
DXCC antenna is resonant on 40 meters.  My SWR was 1.0 to 1, both according
to  the TW1 and the meter on the TS590.  I then checked my output power
reading.  According to the TW1, it was 57 watts, and according to the TS590
meter, the output power was 75 watts.

 

After our lenghthy discussions several weeks ago, when I noticed output
power problems with my TMV71A, I tried my best to clean all DC power
connections.

 

 

My next step will be to try another power supply, just to see if that makes
a difference, which brings up a question.

 

Does anyone on list have a Kenwood PS53 power supply?  I obtained this
supply from an estate sale several years ago, and I think it is meant to be
used with the Kenwood TS570, which I also obtained at that time.

 

I had my XYL check the power draw ratings on the supply, and she told me it
says 16 amps.  This seems a bit low to me, and may not be adequate for the
TS590 on the full 100 watts.

 

If anyone has accurate power draw ratings, or an accessible manual for the
PS53 supply, I'd appreciate the additional info.

 

I'm hoping to do some further experimenting with all of this during the
upcoming Thanksgiving break.

 

Tom Behler: KB8TYJ