Very interesting, Scott.
I haven't experienced that here, but perhaps others have and will provide an
explanation.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Scott Howell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 29, 2011 8:22 PM
Subject: Re: Reduced TS590 Output Power Followup
> Tom,
>
> Glad the problem has been resolved. I had forgotten about the PF key =
> reading the transmit power as well. However, I was surprised to find =
> that my TS590 reports the TX power setting as one thing and pressing the =
> PF key provides something different. For example if I set the rig for =
> five watts, I transmit and get 10 watts. It seems to be 10 watts higher =
> than any power level setting (i.e. 75 watts is 85 watts etc.). Well =
> guess this rig does not qualify for QRP.
>
> 73
> Scott/N3BYY
>
> On Dec 29, 2011, at 7:46 PM, Tom Behler wrote:
>
>> Hi, all.
>>=20
>> Well, it has been a very interesting hour here, as I have tried to =
> figure=20
>> out what was going on with the reduced power readings I was getting =
> with my=20
>> TS590.
>>=20
>> First of all, I want to say a great big thanks to Steve Dresser =
> (WA1RTB).=20
>> For whatever reason, I did not know that pressing the PF function =
> button for=20
>> S meter readings when transmitting gives you the rig's output power.=20=
>
>> Knowing this, and using this function has made a world of difference.
>>=20
>> Before I say anythihng more, let me re-state that all power readings =
> were=20
>> taken with the rig's internal tuner off, the TX power control in the =
> highest=20
>> possible position, and with my Tentech 238A manual antenna tuner in =
> the=20
>> bypass position.
>>=20
>> My first series of tests this evening involved taking power readings =
> at the=20
>> resonant frequency of one of my antennas. My output power readings =
> with=20
>> both the TW1 and the Rig's power meter varied anywhere from 68 to 80 =
> watts.=20
>> In all cases, I was using my Astron RS35 linear power supply.
>>=20
>>=20
>>=20
>> Then, I decided to switch power supplies. I retrieved my Samlex 1235 =
> supply=20
>> from my RV, and tested things with that supply. Again, for the tests, =
> the=20
>> conditions were the same with this new supply.
>>=20
>> When I took power readings this time, the rig's meter gave me a solid =
> and=20
>> consistent 100 watts. The TW1 gave me readings that varied between 87 =
> and=20
>> 89 watts, but they were at least closer to being in the ballpark =
> especially=20
>> when it is considered that the TW1 has about a 10% error margin.
>>=20
>> Then, I connected things back up to the Astron RS35 supply, and, for =
> reasons=20
>> that I don't understand, I once again got consistent 100 watt readings =
> from=20
>> the TS590 watt meter, and found the TW1 readings to vary from 81 to
>> 89=20=
>
>> watts.
>>=20
>> As a result, I am coming to two conclusions:
>>=20
>> 1. Either something is starting to get flaky with my 14-year-old
>> RS35=20=
>
>> supply; or
>>=20
>> 2. When I did the tests with the Samlex supply, something might have =
> gotten=20
>> re-set in the rig so that 100 watts now means 100 watts.
>>=20
>> Do any of these arguments make sense?
>>=20
>> Should I begin to get into the market for a new power supply?
>>=20
>> Just seeking some advice here.
>>=20
>> 73 from Tom Behler: KB8TYJ
>
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