Hi.

One thing that may be worth considering with the internal antenna 
tuners.  Meters such as the TW1 are designed to measure power on a 50 ohm 
load.  Your power out indication may or may not be accurate if the 
impedance on the antenna side of the tuner is considerably different than 
50 ohms.  I've seen this happen many times in the past where a meter won't 
read accurately because the impedance is really 150 ohms or so.  I don't 
know if that is happening in your situation, but it is another possibility 
to consider.

73, de Lou K2LKK


At 12:10 PM 12/24/2007 -0500, you wrote:
>I agree with you, especially now that I see the difference for myself on the
>TW-1. I never was a huge fan of internal tuners because of the narrow tuning
>range and I knew they dropped power but after comparing and being able to
>watch the results for myself, I'd say no more internal tuners for me unless
>I really need it, like field day setup and stuff since I think my 570 may
>end up doing that this coming year.
>----- Original Message -----
>From: "Anthony Vece" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Monday, December 24, 2007 12:01 PM
>Subject: Re: possible problem with output power on IC746
>
>
> > Hi Tom;
> >
> > It can't hurt to do the full reset.
> >
> > I was going to suggest an external tuner.
> >
> > If I ever get back into hf again an external tuner is the only way to go.
> >
> > 73 De Anthony W2AJV
> > [log in to unmask]
> > ECHOLINK NODE NUMBER: 74389
> >
> > ----- Original Message -----
> > From: "T Behler" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Monday, December 24, 2007 10:16 AM
> > Subject: Re: possible problem with output power on IC746
> >
> >
> >>    Anthony:
> >>
> >> Do you have any suggestions of what I might try with my 746?
> >>
> >> I have now tested it on two resonant antennas--my 80-meter dipole, and my
> >> tribander yagi on 20 meters, and with a 1.1 to 1 SWR reading, I still get
> >> only approximately 50 watts out, whether the auto-tuner is on or off.
> >>
> >> I may have to send the rig in for servicing, but obviously want to avoid
> >> that if I can.
> >>
> >> I even thought of doing a full re-set of the CPU, but hate to risk
> >> loosing
> >> all the stuff I have in memories, if it wouldn't work in the end.
> >>
> >> 73 from Tom Behler:  KB8TYJ
> >>
> >> ----- Original Message -----
> >> From: "Anthony Vece" <[log in to unmask]>
> >> To: <[log in to unmask]>
> >> Sent: Monday, December 24, 2007 9:40 AM
> >> Subject: Re: possible problem with output power on IC746
> >>
> >>
> >>> Hi Everyone;
> >>>
> >>> I used the 746 and the 2000 and never had a problem however, the 480
> >>> just
> >>> didn't fit the bill.
> >>>
> >>> It just doesn't have that Kenwood footprint.
> >>>
> >>> Merry Christmas
> >>>
> >>> 73 De Anthony W2AJV
> >>> [log in to unmask]
> >>> ECHOLINK NODE NUMBER: 74389
> >>>
> >>> ----- Original Message -----
> >>> From: "John Miller" <[log in to unmask]>
> >>> To: <[log in to unmask]>
> >>> Sent: Sunday, December 23, 2007 6:17 PM
> >>> Subject: Re: possible problem with output power on IC746
> >>>
> >>>
> >>>> From what someone else said, and what I've observed here, it seems to
> >>>> be
> >>>> mostly internal tuners. I don't notice any noticeable drop through my
> >>>> external LDG tuner on my IC-706, or my LDG tuner hooked up to the G5RV,
> >>>> weather it be on my TS-2000 or TS-570. From the numbers, I'd say the
> >>>> TS-520's not losing anything either so I think it's mostly the internal
> >>>> tuners. If someone else has noticed anything else, I'd be curious.
> >>>> ----- Original Message -----
> >>>> From: "Walt" <[log in to unmask]>
> >>>> To: <[log in to unmask]>
> >>>> Sent: Sunday, December 23, 2007 6:08 PM
> >>>> Subject: Re: possible problem with output power on IC746
> >>>>
> >>>>
> >>>>> Hi Guys,
> >>>>> Is it only internal, auto tuners or all auto tuners that give the
> >>>>> reduction
> >>>>> in power?
> >>>>>
> >>>>> Walt
> >>>>> WA4QXT
> >>>>> New London CT
> >>>>> [log in to unmask]
> >>>>>
> >>>>
> >>>>
> >>>
> >>>
> >>
> >>
> >
>
>
>
>
>--
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>Checked by AVG Free Edition.
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>12/24/2007 11:19 AM

Louis Kim Kline
A.R.S. K2LKK
Home e-mail:  [log in to unmask]
Work e-mail:  [log in to unmask]
Work Telephone:  (585) 697-5740