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

[Mark Spencer]

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
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