Hi, folks.

I know we have had similar discussions on the list before, but tonight I 
feel I have discovered something that may be of interest to others.

Basically, over the past few days, I have found that even when transmitting 
on the resonant frequency of an antenna with a 1.0 to 1 SWR, my TS590 seems 
to fold back to an output power of approximately 50 watts.  These power 
readings have been obtained from both the meter on the TS590, and my TW1 
talking watt meter.

I thoroughly checked all coax and DC power connections, but everything 
seemed ok.

I measured the power supply's voltage first with no load, and it was 13.35 
volts consistently.  However, when I transmitted in RTTY mode with 100 
watts, thereby putting a full load into the circuit, the DC voltage readings 
started fluctuating all over the place.  They ranged from a high of 10 
volts, to as low as 2 or 3 volts.  Then, on a whim, I connected the Kenwood 
PS53 power supply that I got with the Kenwood 570 I purchased from the 
estate sale in our area, and the output power readings were a very solid 100 
watts, even when the rig was keyed down continuously for several minutes.

I know there is a way to adjust the voltage in the RS35, but with the 
foldback of the ts590, and the fluctuations in voltage readings, I'm now 
getting a bit nervous about using the RS35 as my main supply.

Does anyone have any thoughts or similar experiences to report?

If I do need to be in the market for a new power supply, I have several 
requirements:

1.  I'd like it to be a linear supply

2.  I'd like it to be something that could deliver at least 40 amps 
continuously through my rigrunner, because I sometimes run the TS590, my 
TMV71A, and my TMV7A packet set-up simultaneously.

If anyone has specific suggestions regarding a supply that I might wish to 
consider, please let me know.

73 from Tom Behler: KB8TYJ