[amsat-bb] Re: Polarity Switch Question
g.shirville at btinternet.com
Wed Nov 25 12:52:53 PST 2009
AO51 435.150MHz transmitter is LHCP
AO51 435.300MHz transmitter is RHCP
although there will be occasional fades during a pass and sometimes the two
TXs are not providing identical RF levels, the difference should be quite
great and enough to determine which way round the switch works!
----- Original Message -----
From: "David Wing" <david at cdwing.com>
To: "'AMSAT-BB'" <amsat-bb at amsat.org>
Sent: Wednesday, November 25, 2009 8:15 PM
Subject: [amsat-bb] Polarity Switch Question
> Getting really close to having everything installed and working on the
> May get to work some birds later today if the XYL doesn't corner me with
> housekeeping chores in preparation for tomorrow.
> One of the antennas that I'm putting up is an old Cushcraft 30 element 440
> with a polarity switch. I have not been able to find any documentation on
> this antenna and I wonder if there is an easy way to determine if the
> antenna is set up for RHCP or LHCP. Clearly feeding 12v to the switch
> change the polarity but I'm wondering if there is an easy way to determine
> what the default setting is before the switch is energized.
> 73, David
> Sent via AMSAT-BB at amsat.org. 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
More information about the AMSAT-BB