Tom,
I've foergotten what the error value of the TW1 can be. I would
think that you are well within the ball park.
Pat, K9JAUAt 05:08 PM 6/30/2011, you wrote:
>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
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