Well at least the tuner protects the radio. Maybe check the meters when
using no tuner at all.
----- Original Message -----
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, January 02, 2012 5:42 AM
Subject: Re: More power output readings--now doubting accuracy of LDG TW1
> Bob:
>
> Your concern about auto-tuners is why I tend to use my Tentech 238A manual
> tuner if I ever want to be really sure that I'm getting the maximum power
> out of the rig with an antenna that is not exactly resonant.
>
> Actually, the auto-tuner in an Icom 746 I used to have was even worse in
> terms of lessening rig output power than the auto-tuner in the TS590 seems
> to be.
>
> So, in summary, I guess rig auto-tuners are a compromise at best, but can
> come in handy if you want to do quick tuning for a contact or net
> check-in.
>
> 73 from Tom Behler: KB8TYJ
>
> ----- Original Message -----
> From: "Bob, K8LR" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, January 01, 2012 10:47 PM
> Subject: Re: More power output readings--now doubting accuracy of LDG TW1
>
>
>> 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
>>
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