Hi Tom:
Try putting the Icom 746 on a dumby load through the talking meter and see
how much power it shows then.
The coax may well make the difference.
73
Lowell W8QIY
----- Original Message -----
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, August 23, 2005 9:51 PM
Subject: question on output power discrepancies with different rigs and
antennas
> Hi, all.
>
> I believe there was a discussion like this on the list regarding
> the Kenwood TS2000 several weeks ago, but I missed the outcome of
> the discussion because I was on vacation.
>
> I'll try to explain my question here, and would appreciate any
> help.
>
> Don't laugh too loud if I'm asking a stupid question here, ok?
>
> Here goes:
>
> I currently use the talking SWR meter that was manufactured for a
> while by Remy Simard. But, I'm getting very strange readings,
> depending on what rig and antenna I am using.
>
> When I use the talking SWR meter on my Icom 718, I get an
> output power reading of approximately 100 watts with a 1 to 1 SWR
> reading when emitting a continuous CW tone. This indeed makes
> sense. The antenna that I'm doing the testing on with the 718 is
> the Buddipole antenna, with a 25-foot feed line.
>
> However, when I go to my Icom 746 rig, and put it on high power
> which is supposed to be 100 watts, I only seem to get a reading
> of 66 watts output power on CW. In doing this, I still use a
> continuous CW
> tone, and make sure I'm at a 1 to 1 SWR reading with the antenna
> I'm using.
>
> The only difference I can think of that is causing these strange
> readings is that the feedlines for the antennas that I use with
> the Icom 746 are quite a bit longer than the feedline I use for
> the antenna with the Icom 718. Specifically, I estimate that the
> feedlines are roughly 100 feet long.
>
> Could this difference in feed line length alone explain the
> discrepancies I'm getting?
>
> Or, could there be something wrong with myIcom 746?
>
> Any help would be appreciated.
>
> Best 73 from Tom Behler: KB8TYJ
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