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Re: Best Sat rig 847 desensing




----- Original Message -----
From: <Ke4yyddave@aol.com>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, October 21, 2000 7:06 AM
Subject: Re: [amsat-bb] Best Sat rig 847 desensing


> A picture of the Kenwood TS-2000 is on the back cover of Nov QST.
>
> Check the archives of the FT-847 bulletin board and you will find several
> posts concerning mode JA desensing.  The FAQ has info on this problem also
> but the attribute the problem to third harmonics and the close proximity
of
> the antennas. In my rig, this was not the case as I tried antennas over
100
> ft apart, dummy loads, grounding and everything else I could think of.  My
> 820 does not have a desensing problem with my station configuration.  I
can
> use the 847 for tx and the 820 for rx with no problem and vice versa.
>
> I discovered a "spur" was transmitted by the 847 at 145.950 and was
received
> at 435.850.  The rig was returned to yaseu for warranty service twice for
> this and other minor problems not related.  The rig was kept for over 30
days
> the first time and the desensing problem was not addressed.  The second
time
> the rig was kept for 45 days waiting for a "fix from Japan."  Although the
> spur was moved out of the satellite band, I could still hear an increase
in
> the noise level on 70cm when the mic is keyed on 2m.   I asked Yaseu
several
> times to replace the unit to no avail.
>
> I am not active on mode JA at the present time, but when I am, I find it
much
> easier to use separate rigs for tx an rx.
>
> David KE4YYD
> ----
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 I had the same problem as David on an early model 847. After Yaesu couldn't
fix it, they had the dealer,,now out of amateur radio, RT Systems, to refund
my money. I'm now using an FT-736, which I think is a better rig for
satellite work than the 847. That's my 2 sense.
McCoy--N5YAV

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