Tom,

I use an RF applications P2000 watt meter and the power indications between 
the ts590 and the P2000 are pretty accurate.  One thing that will throw 
power readings off though, is the use of the rig's internal tuner.  That's 
why I almost never use any internal tuner.  When I turn the internal tuner 
on, I see a power drop from 10 to 20 watts.  Tuners in to days modern rigs 
are all based on lumpt inductors and fixed capacitors.  They are not like 
the tuners in the older rigs that had motor driven variable capacitors and 
inductors.

Bob, K8LR, [log in to unmask]

----- Original Message ----- 
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, January 01, 2012 2:45 PM
Subject: More power output readings--now doubting accuracy of LDG TW1


Hi, folks.

I know, I know, it's just the professor in me, but this output power issue
I've been dealing with is intellectually interesting, if nothing else.  I
fully realize that 20 watts either way isn't going to make a difference in
terms of who hears me, how well they hear me, etc., but I have to report on
my latest set of output power readings this morning.

First of all, When I use my Astron RS35 power supply, and take output power
readings with the watt meter on the TS590, things now seem to be pretty
stable at 100 watts output on either a resonant frequency for one of my
antennas, or when using the TS590 auto-tuner.  Obviously, the resonant
frequency readings are going to be the  most revealing, so those are the
ones I have the most faith in.

What I still don't understand is why my LDG TW1 seems to be about 20 watts
off with its output power readings.  For now, I'm going to go with the
readings the radio gives me, since the rig is what needs to be kept happy.

Between Mike Duke  and Steve Forst, I do have some good instructions if I
ever want to tweak the output voltage on the Astron RS35, but I think I'll
hold off on doing that for a while until I see if things remain as stable as
they are right now.

Thanks to all for your your continued interest in, and help with this issue.

73 from Tom Behler: KB8TYJ