[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

re Polarity control box - again



Hi Mak, thanks for reply.
The problems occur when we go and try and make the polarity control unit remote controlled. I have a fully working manual unit here in the shack and is 100% fine.
However the remote unit I built use's relays to add in extra lengths of 50ohm coax as a delay line (a 1/4 wave on the -45degree yagi, and a 1/2wavelength on the +45degree yagi.)
This system I have seen used by very many operators and also some comercial units, however with just the 2 delay lines the LHCP will never really be LHCP, it needs an extra set of relays to switch in the other 1/4wave delay line.
I was just wondering if anyone else had seen this or have I just misunderstood the circuit somehow.
Any thoughts would be appreaciated.
regards
Gus M0IKB

-- 
I am using the free version of SPAMfighter for private users.
It has removed 1661 spam emails to date.
Paying users do not have this message in their emails.
Get the free SPAMfighter here: http://www.spamfighter.com/len
_______________________________________________
Sent via AMSAT-BB@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



AMSAT Top AMSAT Home