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@att.net>To: amsat-bb@amsat.org <amsat-bb@amsat.org>Sent: Wednesday, May 6, 2020, 02:55:41 PM CDTSubject: 2M desense on Icom IC-9700I 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@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