I think that would be disconcerting to me as well.
----- 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
>>>>
>>>>
>>>
>>
>>
>
|
