Do I remember correctly that there was terrain blockage also -- the lower
antenna was down a mountain slope? And that you did this on 10 & 20, as well
as 15?
Dave K3ZJ (then-op. @ W3AU listening to you from the east coast)
On Nov 28, 2013, at 12:12 PM, "Rex Maner" <k7qq@netzero.net> wrote:
> In the early 70's K7JA and myself W5QQQ operated at W7RM, we started on 15
> ssb working JA's and the Caribbean, Chip was running well over 200 Q's per
> hour and I was S & P .
>
> At this particular time there was no restriction on how many signals could be
> on the band at the same time.
>
> We were both running Collins S-Line and KW's.
>
> The antennas had aprox 250 foot of vertical separation . The lower antenna
> was about 70 ft above saltwater beaming to Asia and antenna # 2 was at 170
> foot beaming east.
>
> We were able to, with ease operate within 15Khz and not even know the other
> station was on the band. We had no filters .
>
> Rex K7QQ
>
>
> -----Original Message-----
> From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of
> Kevin McGrath
> Sent: Thursday, November 28, 2013 2:55 AM
> To: cq-contest@contesting.com
> Subject: [CQ-Contest] two radios on same band (10m contest)
>
> I would like to get some advice on running two radios on the
> *same* band, specifically for 10 meters.There’s plenty of good information
> here and on the web regarding minimizing interference when running multiple
> radios on different bands, but not much info at all on the same band.
>
> The plan is to enter the ARRL10m contest, multi-op, mixed SSB/CW, low-power
> (<150 watt) category and use a run radio and a multiplier radio (only one
> transmitter at a time). To help minimize interference, one radio would be on
> CW portion (say below 28.050) and the other on SSB (above 28.400) and thus
> maintain at least a 350-400kHz frequency separation. Also the antennas for
> each radio will be different polarizations. But given space limitations at
> the QTH, the antennas can only be separated by 100’. Are commercial
> bandpass filters or homebrew designs available for in-band use?
>
>
> I’m guessing two
> radios have been successfully used for the 10m contest. Any ideas or tips on
> the setup for minimizing inter-station interference would be greatly
> appreciated.
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