I purchased an external antenna tuner.
John
----- Original Message -----
From: "T Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, December 23, 2007 8:44 PM
Subject: Re: possible problem with output power on IC746
> John:
>
> Do you have a 746, and have you figured a way around this problem?
>
> I just can't believe the auto-tuner is causing that much output power to
> be
> lost.
>
> 73 from Tom Behler: KB8TYJ
>
> ----- Original Message -----
> From: "john vernaleken" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, December 23, 2007 6:32 PM
> Subject: Re: possible problem with output power on IC746
>
>
>>I find the same, about 60%. It seems to be the same for all of us.
>>
>>
>> John KC2QJB
>>
>>
>> ----- Original Message -----
>> From: "T Behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Sunday, December 23, 2007 5:26 PM
>> Subject: Re: possible problem with output power on IC746
>>
>>
>>> John:
>>>
>>> My XYL and I tried it with the auto-tuner totally turned off, even in
>>> the
>>> menu, and, even though we had a flat 1.1 to 1 SWR reading, we only had
>>> about
>>> 60% power output on the highest possible power setting on the IC746.
>>>
>>> Rather strange, and a bit disconcerting.
>>>
>>> 73 from Tom Behler: KB8TYJ
>>>
>>>
>>> ----- Original Message -----
>>> From: "John Miller" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Sunday, December 23, 2007 3:08 PM
>>> Subject: Re: possible problem with output power on IC746
>>>
>>>
>>>> Most radios you just push the tune button quickly and that will turn it
>>>> off.
>>>> I'm not familiar with that radio but I'd think that's how it is.
>>>> ----- Original Message -----
>>>> From: "T Behler" <[log in to unmask]>
>>>> To: <[log in to unmask]>
>>>> Sent: Sunday, December 23, 2007 2:28 PM
>>>> Subject: Re: possible problem with output power on IC746
>>>>
>>>>
>>>>> Lou:
>>>>>
>>>>> I don't have a dummy load here, but am planning to order one of the
>>>>> 300-watt
>>>>> dry dummy loads from MFJ whenever I get the bucks.
>>>>>
>>>>> In the meantime, I'm going to see what I can do to totally take the
>>>>> automatic antenna tuner out of the circuit, and see what happens.
>>>>>
>>>>> I'll probably have to go into some menu setting to accomplish that.
>>>>>
>>>>> I sure hope it's nothing wrong with the 746, but at least if it is, I
>>>>> have
>>>>> the TS480 now to use.
>>>>>
>>>>> 73 from Tom Behler: KB8TYJ
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "Lou Kline" <[log in to unmask]>
>>>>> To: <[log in to unmask]>
>>>>> Sent: Sunday, December 23, 2007 2:15 PM
>>>>> Subject: Re: possible problem with output power on IC746
>>>>>
>>>>>
>>>>>> Hi.
>>>>>>
>>>>>> It would be interesting to see if the radio shows the same behavior
>>>>>> when
>>>>>> going into the dummy load with the auto tuner switched out. I've
>>>>>> noticed
>>>>>> a
>>>>>> phenomenon, which I don't quite understand, where putting an auto
>>>>>> tuner
>>>>>> in
>>>>>> line will sometimes cause a radio to roll back the power even when
>>>>>> the
>>>>>> SWR
>>>>>> looks good. And, on my Kenwood TS690S, on 10 meters, it rolls the
>>>>>> power
>>>>>> back even on a good load UNLESS I switch the auto tuner in! There
>>>>>> sure
>>>>>> seems to be some goofy things that go on that the instrumentation
>>>>>> doesn't
>>>>>> always reveal.
>>>>>>
>>>>>> 73, de Lou K2LKK
>>>>>>
>>>>>>
>>>>>>
>>>>>> At 01:16 PM 12/23/2007 -0500, you wrote:
>>>>>>>Key the mic on CW as well, it will work. that seems strange though if
>>>>>>>it
>>>>>>>showed high power before. Hopefully there's nothing going wrong. If
>>>>>>>you
>>>>>>>have
>>>>>>>the tuner in the radio on, turn that off and see if that changes
>>>>>>>things.
>>>>>>>I
>>>>>>>haven't checked on the TS-2000 yet but I know my 570, the tuner can
>>>>>>>cut
>>>>>>>the
>>>>>>>power back a bit. Not that much, but it's something to check anyway.
>>>>>>>----- Original Message -----
>>>>>>>From: "T Behler" <[log in to unmask]>
>>>>>>>To: <[log in to unmask]>
>>>>>>>Sent: Sunday, December 23, 2007 1:12 PM
>>>>>>>Subject: possible problem with output power on IC746
>>>>>>>
>>>>>>>
>>>>>>> > Hello all.
>>>>>>> >
>>>>>>> > I've developed a strange problem with my Icom 746 transceiver,
>>>>>>> > that
>>>>>>> > I
>>>>>>> > could
>>>>>>> > use some help with.
>>>>>>> >
>>>>>>> > I have noticed that, when using my talking SWR meter unit, I only
>>>>>>> > seem
>>>>>>> > to
>>>>>>> > get about 60% output power with an antenna that is resonant on 3.7
>>>>>>> > MHZ
>>>>>>> > and
>>>>>>> > which has a 1.1 to 1 SWR reading.
>>>>>>> >
>>>>>>> > Thinking that something might be wrong with my talking SWR meter,
>>>>>>> > I
>>>>>>> > had
>>>>>>> > my
>>>>>>> > sighted XYL help me do some checking without the talking SWR
>>>>>>> > meter,
>>>>>>> > using
>>>>>>> > the meter on the front of the radio.
>>>>>>> >
>>>>>>> > She helped me check the output power meter on the IC746 itself by
>>>>>>> > completely disconnecting the talking SWR meter, and then doing the
>>>>>>> > test.
>>>>>>> >
>>>>>>> > She tells me that, on the bottom scale of the meter, the SWR
>>>>>>> > reading
>>>>>>> > for
>>>>>>> > my
>>>>>>> > resonant 80-meter dipole is indeed 1.1 to 1, which is just what
>>>>>>> > I'd
>>>>>>> > expect
>>>>>>> > it to be. However, the power output percentage is only around 60%
>>>>>>> > when
>>>>>>> > the
>>>>>>> > RF
>>>>>>> > power knob is turned all the way to the right.
>>>>>>> >
>>>>>>> > I'm doing these tests in both CW and RTTY modes.
>>>>>>> >
>>>>>>> > When I do the test in RTTY mode, I simply use the PTT on the mic.
>>>>>>> > When
>>>>>>> > doing the test in CW mode, I simply have my paddles send a series
>>>>>>> > of
>>>>>>> > "dahs".
>>>>>>> >
>>>>>>> > Could I have something set wrong with the 746, or is there
>>>>>>> > something
>>>>>>> > wrong
>>>>>>> > with the rig itself?
>>>>>>> >
>>>>>>> > Is there something else I should try?
>>>>>>> >
>>>>>>> > I think I'll go play with my new TS480 now. (grin)
>>>>>>> >
>>>>>>> > 73 from Tom Behler: KB8TYJ
>>>>>>> >
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>--
>>>>>>>No virus found in this incoming message.
>>>>>>>Checked by AVG Free Edition.
>>>>>>>Version: 7.5.516 / Virus Database: 269.17.7/1194 - Release Date:
>>>>>>>12/23/2007 5:27 PM
>>>>>>
>>>>>> 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
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
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