[amsat-bb] Fw: 2M desense on Icom IC-9700

[Michael Walker]

I have to agree, I got zero desense.

I am using a VHF 4 Element Quad beside a 7 Element UHF quad on a 6ft boom
fiberglass boom.  This is with running full power on either band.

Mike va3mw




On Thu, May 7, 2020 at 2:17 PM Charles Reiche via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> I also have not had desense issues on my 9700 compared to my 910. I
> actually removed my mode J filter.
>
> No problems here.
> N3CRT
> Charles Reiche
>
>
> On Thu, May 7, 2020 at 11:34 AM KI7UNJ Tucker via AMSAT-BB <
> amsat-bb at amsat.org> wrote:
>
> > I have to say I'm not getting desense with my IC-9700,  unless I'm using
> > more power than is needed or should be using on the SSB Sats.
> >
> > Maybe try to lower your power? RS-44 can easily be worked at around 2%
> (2w)
> > power and I work SO-50 at 0-3% every time (500mw-3w)
> >
> > On Wed, May 6, 2020 at 6:52 PM Kevin via AMSAT-BB <amsat-bb at amsat.org>
> > wrote:
> >
> > > Jerry,
> > >     Comparing the 9700 to my 9100 I also noticed that it was much more
> > > prone to desense, it was not as bad here as what you are seeing but it
> > > was there, same antennas here BTW.
> > > The desense with the lack of 9600 packet support made it easy for me to
> > > go back to my 9100 and sell the 9700. Had I kept it my next plan was to
> > > put a diplexer in line on the 70cm side with a 50 ohm load on the 2m
> > > port, this would probably be your best option and putting it before an
> > > external preamp would also be best if you are using one.
> > >
> > > 73
> > > Kevin WA7FWF
> > >
> > > On 5/6/2020 6:18 PM, BeetleJerald Oliver via AMSAT-BB wrote:
> > > >
> > > >
> > > >     ----- Forwarded Message ----- From: BeetleJerald Oliver <
> > > revjwo at att.net>To: amsat-bb at amsat.org <amsat-bb at amsat.org>Sent:
> > > Wednesday, May 6, 2020, 02:55:41 PM CDTSubject: 2M desense on Icom
> > IC-9700
> > > >   I just replaced my Yaesu FT-847 with the Icom IC-9700.  I am having
> > > problem with 2M uplink overloading (desense) the 70CM downlink,
> resulting
> > > in not being able to use RS-44, FO-29, or SO-50.  It is the same
> antenna
> > > system that I used with the FT-847 and I experienced no problem at all
> > with
> > > the FT-847.  SWR on both VHF/UHF is quite low using M2 CP yagis on
> > > fiberglas boom, 11 feet apart.  I have the problem whether I use the
> > > preamps, or not.  Even at 5W out, it is quite noticeable. Anyone else
> had
> > > this problem?
> > > > KJ4EU    Jerry
> > > > _______________________________________________
> > > > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum
> available
> > > > to all interested persons worldwide without requiring membership.
> > > Opinions expressed
> > > > are solely those of the author, and do not reflect the official views
> > of
> > > AMSAT-NA.
> > > > Not an AMSAT-NA member? Join now to support the amateur satellite
> > > program!
> > > > Subscription settings:
> https://www.amsat.org/mailman/listinfo/amsat-bb
> > >
> > > _______________________________________________
> > > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> > > to all interested persons worldwide without requiring membership.
> > Opinions
> > > expressed
> > > are solely those of the author, and do not reflect the official views
> of
> > > AMSAT-NA.
> > > Not an AMSAT-NA member? Join now to support the amateur satellite
> > program!
> > > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> > >
> >
> >
> > --
> > *Casey Tucker  KI7UNJ*
> > https://twitter.com/KI7UNJ
> > _______________________________________________
> > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> >
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>