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Re: Best Sat rig 847 desensing



Hi John....
It is RECOMMENDED for ALL working like
modes >J< or similars...TO USE a BANDPASS-
FILTER in the receiving line or minimal an
PREAMPLIFIER....!
If You will do that,YOU WILL LOST ALL
BIRDIES in the downlink range...!!!
The birdies are NOT a problem of the FT-847.
The birdies are undefined harmonics of Your
uplink-signal.

73`s de
Jens / HB9JOI
AMSAT-DL.#9802268 / UKSMG#2069 / elecraft>K2#1577< / DL-QRP-AG#01176

----- Original Message -----
From: "John M. Fisher" <k2jf1@home.com>
To: "Jens Spiess" <jspiess@dplanet.ch>
Sent: Saturday, October 21, 2000 5:51 PM
Subject: Re: [amsat-bb] Best Sat rig 847 desensing


> Good afternoon Jens...Problem I have with my 847 is the "birdies." I get
my
> signal which isn't the one from the Birds at various places..I find these
> spurious signals are quite annoying, but one I have marked them out OK.
Yes I am
> using one antenna but two different feedlines. Wish Yaseu would do
something
> about the problem.
> Hope hear you on one of the Birds...I work analog only and generally
CW...C U L
> 73 John K2JF
>
> Jens Spiess wrote:
>
> > I have also NO problems with desense with the FT-847.
> > The FT-847 is even much more better as the FT-736R...
> > Never get a better satellite-transceiver before.....
> > Can not understand all the disasters..about the FT-847.
> > de Jens / HB9JOI
> > http://www.qsl.net/hb9joi/index.html
> >
> > ----- Original Message -----
> > From: "John Santillo" <u1004467@warwick.net>
> > To: "McCoy Phillips" <mphill@tsixroads.com>; <Ke4yyddave@aol.com>;
> > <amsat-bb@AMSAT.Org>
> > Sent: Saturday, October 21, 2000 1:36 PM
> > Subject: Re: [amsat-bb] Best Sat rig 847 desensing
> >
> > > I have found the complete opposite of what McCoy found.  I had desense
> > > problems with the 736 but never had a problem with the 847.
> > >
> > >
> > > John
> > > N2HMM
> > >
> > >
> > > ----- Original Message -----
> > > From: "McCoy Phillips" <mphill@tsixroads.com>
> > > To: <Ke4yyddave@aol.com>; <amsat-bb@AMSAT.Org>
> > > Sent: Saturday, October 21, 2000 9:02 AM
> > > Subject: Re: [amsat-bb] 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
> > > > > ----
> > > > > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > > > > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> > > >
> > > >  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
> > > >
> > > > ----
> > > > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > > > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> > > >
> > >
> > > ----
> > > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>

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