[amsat-bb] Re: AMSAT-BB Digest, Vol 2, Issue 504
g.shirville at btinternet.com
Tue Aug 14 03:52:01 PDT 2007
And my solution has been to use a "splitter" (also known as duplexers or
diplexers) designed to work with a dual band antenna. The common goes to the
antenna, the UHF connection to the UHF rig and the VHF to a small dummy
load... it always seem to work here... Most are listed under the Diamond
----- Original Message -----
From: <richard at g3rwl.demon.co.uk>
To: <amsat-bb at amsat.org>
Sent: Tuesday, August 14, 2007 9:32 AM
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 2, Issue 504
>> The other downside is that even with two transceivers, I'm unable to work
>> full-duplex. The two bands on the antenna use seperate elements and feed
>> points, but share a boom. Transmitting on 2m completely overloads the
>> front-end of the IC-7000. While full duplex would be useful, it's not
>> absolutely necessary.
> Theres also the old fashioned stub, you put a 2m quarter-wave open-circuit
> stub on the 70cm feeder close to the input of the preamp (maybe another
> close to the input of the rig). A little bit tricky to tune (fabricate it
> long and snip tiny bits of it off until you get maximum attenuation).
> Richard G3RWL
> 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