[VHFcontesting] SO2R 6m/2m 6m causing S9 noise on 2m

[Jay RM]

I have the opposite problem.  When I TX on 2, it overloads and quiets the
6M radio.  I have a 2M stub filter on the 6M receive line for other
purposes, which probably gives me 10-15 dB of extra rejection, but I still
can't hear anything on 6 when 2 is in TX.  Seeing the two antenna are on
the same mast, separated by 6' and I run high power on both bands, I really
can't complain.  Probably a miracle I haven't smoked something important
before now.

-W9RM

Keith Morehouse
via MotoG

On Mon, Jan 18, 2021, 11:40 AM Mark Spencer <mark at alignedsolutions.com>
wrote:

> Hi Chuck.   I have recently started using a filter between my 2M radio and
> the antenna when I run my 6M and 2M roving antennas on the same mast.  It
> seemed to improve matters considerably.
>
> That being said when I usually run separate masts for my 2M and 6M
> antennas I have little or any interference so my this may or may not be
> helpful for you.
>
>
> Good luck and 73
>
> Mark S
> VE7AFZ
>
> mark at alignedsolutions.com
> 604 762 4099
>
> > On Jan 18, 2021, at 10:10 AM, Chuck Dietz <w5prchuck at gmail.com> wrote:
> >
> > I tried dueling CQs for 6M and 2M  during the VHF contest. 6m was totally
> > quiet when 2m was transmitting, but 2m had S9 white noise when 6m was
> > transmitting. Antennas are 130 feet apart. Happens with even 50 watts on
> > 6M, although "only" S7 then. Using FT8 for both bands. Rig is Flex 6700
> > with a DEMI 2m low drive amp with receive preamp. When I transmit SSB on
> > 6m, it sounds like splattering on voice peaks.
> >
> > I need advice on what to try.
> >
> > Thanks,
> > Chuck W5PR
> > _______________________________________________
> > VHFcontesting mailing list
> > VHFcontesting at contesting.com
> > http://lists.contesting.com/mailman/listinfo/vhfcontesting
> >
> _______________________________________________
> VHFcontesting mailing list
> VHFcontesting at contesting.com
> http://lists.contesting.com/mailman/listinfo/vhfcontesting
>