On 4 Dec 2011, at 00:58, "i8cvs" <[email protected]> wrote:
> ----- Original Message ----- > From: "Dominic Hawken" <[email protected]> > To: <[email protected]> > Sent: Sunday, December 04, 2011 12:54 AM > Subject: [amsat-bb] Remote polarity / preamp switching > > I currently have two runs of coax from the shack up to the roof, each > connected to smallish dual band 2/70 yagis, horizontally polarised, on an > az/el rotator. One's connected to the 70cm output of my FT847, and the other > to the 2m output. >> I'd like to upgrade to cross-polarised beams for 2 and 70 that I can > switch between vertical, horizontal and circular polarisation, and also add > masthead preamps powered through the coax. Some form of remote switching > seems to be the way to go, but the few commercial switches I've found > googling are really expensive (and I'd need two afaik). >> > I'm basically wanting to upgrade without having to run more coax or power > cable up to the mast if possible - wondering of anyone has done something > similar without breaking the bank. >> >> Thanks in advance tor any help, >> >> Dominic G6NQO. >> > Hi Dominic, G6NQO > > Your project is a difficult task on time and money. > > BTW in a separate email to you I have attached my articles > "Switching Four Polarizations on a 70 cm crossed yagi" > publisced into the AMSAT Journal March/April 2007 first > part, and May/June 2007 the second part. > > 73" de > > i8CVS Domenico Thank you Domenico - much appreciated. Best, Dominic G6NQO _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
