Hello Jan.
Try Desense filter.
More info here - http://www.amsat.org/amsat-new/articles/Mode-J/
Regards.
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of PE0SAT | Amateur Radio
Sent: Tuesday, November 20, 2012 8:12 PM
To: Amsat bb
Note that Jan is specifically asking about VO-52 (mode UV), *NOT* FO-29
(mode VU). There is a big difference. When the uplink is VHF, the third
harmonic of 145 MHz is 435 MHz so desense is often a problem. I have always
noticed that difficulty with my FT-847 on FO-29 in the absence of external
Hi Dimitry,
I know of this filter, but these are for working FO-29 when the uplink
is 145 and the downlink 435.
The Harmonics produced by the 145 uplink signal interfere with the 435
downlink. Now I experience the
same with VO-52 but there the uplink 435 and the donwlink 145 ???
So why is
Hello Guys.
Sorry I do not read all message.
John right.
I have IC-910H and do not have problem under VO-52 operating.
But I have small VHF UHF antennas and good SWR.
Regards.
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of
Hi Jan,
Sorry to learn of your problems and appears really annoying especially as
you have carried out an equipment change.
Not trying to teach you as you are an expert with lots of experience in
operating amateur radio on many bands and modes. But please consider the
following.
It is hardly
Hi Jan, PA0SAT
Your problem with VO-52 ,uplink 435 MHz and downlink 145 MHz
is not due obviously by armonics but by 435 MHz overloading the
IC-910 receiving 145 MHz because probably this tranceiver has a
lover 1 dB compression point at 144 MHz in comparison to a FT-847
and so it is more subject
