That's within spec for the tw-1. It may not be dead on but that is in the 
acceptable range.
----- Original Message ----- 
From: "tom behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, June 30, 2011 6:08 PM
Subject: Wonder if these TS590 output power readings sound reasonable?


> Hi, all.
>
> Well, I have done some fairly extensive testing on the output power 
> readings
> for my TS590, and I wonder if what I'm seeing is what can be reasonably
> expected.
>
> Let me start with some general background:
>
> First of all, I took the voltage reading from my Astron RS35 linear power
> supply, and it read about 13.8 volts--right where I had hoped it would be.
>
> Then, I took a bunch of SWR and output power readings, on various bands 
> and
> frequencies, using my DXCC and Windom antennas.
>
> My best readings were found on 80 meters, where I could get my Alpha Delta
> DXCC antenna down to an SWR of 1.2 to 1.  I can get reasonably low SWR's 
> on
> other bands and frequencies with the DXCC or my Windom, but without an
> antenna analyzer, the 80-meter frequency with the DXCC was the lowest I
> could get.  All readings were taken with the internal automatic antenna
> tuner off.
>
> With a 1.2 to 1 SWR reading on 80 meters, my LDG Tw1 gave me a forward 
> power
> reading of 95 watts, and a reflected power reading of 1.2 watts.
>
> Just for kicks, I had my sighted XYL look at the watt meter on the TS590,
> and she said it was pegged at the maximum 100 watt level.  My XYL also
> approximated my output power using the meter on my Tentech 238A manual
> tuner, and she said it looked to be just a hair below 100 watts.
>
> Interestingly, for reasons which I can't quite figure out, my output power
> reading was slightly lower when I used a dry dummy load.  Specifically, 
> the
> readings ranged from 90 to 93 watts with the dummy load connected after 
> the
> TW1.
>
> Do these readings seem reasonable?
>
> Actually, I'm wondering if my TW1 is slightly off callibration.
>
> If so, does anyone know how or whether the TW1 can be callibrated?
>
> I'd be interested in any thoughts anyone has.
>
> 73 from Tom Behler:  KB8TYJ