I had the same questions with my TW-2. A friend tested it with his Bird and 
a commercial dummy load. He found it on the mark with SWR and off by 1 watt 
on power. Meanwhile, I had gotten less favorable results on my equipment. As 
noted here last night, sometimes it adds forward and reverse power to give a 
reading far above what the 746Pro can deliver. According to its manual, it 
should not need adjustment by the user but I was about to look into that 
option given my findings.

Bob Martin

EchoLink Node - 55127
Please visit http://www.wan-leatonks.net.
----- Original Message ----- 
From: "Gerry Leary" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 01, 2011 8:56 PM
Subject: Re: Wonder if these TS590 output power readings sound reasonable?


> Wow with such low power you will never be able to get out.  It will never
> drive the amplifier, and even your next door neighbor won't give you any
> better then an S4 reading.  hehehahahahiheha
> ----- Original Message ----- 
> From: "tom behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, June 30, 2011 4:35 PM
> Subject: Re: Wonder if these TS590 output power readings sound reasonable?
>
>
>>    Thanks, John.
>>
>> I'll be interested to hear what others have to say.
>>
>> It has been an interesting learning experience for sure.
>>
>> 73 from Tom Behler:  KB8TYJ
>>
>> ----- Original Message ----- 
>> From: "John Miller" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Thursday, June 30, 2011 6:18 PM
>> Subject: Re: Wonder if these TS590 output power readings sound 
>> reasonable?
>>
>>
>> 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