[Alexandria Radio Club Reflector] [HacDC:ARC] Combining 2 Single Channel VHF Radios on One Antenna

[Martin]

I'd be concerned about burning out the front end of a TR when the other
transmits with a duplexer without any other filtering.  I think that
getting cavity filters for the radios would help sensitivity in any event.

Another approach would be carrier sense TR relays or building our own TR
controller.

BTW - I bid on this but lost:
http://www.ebay.com/itm/VHF-bandpass-cavity-filter-/271541196481?ssPageName=STRK%3AMEWAX%3AIT&_trksid=p2047675.l2557&nma=true&si=IWqbkOJm6Vb0bHPtDg400kf97i0%253D&orig_cvip=true&rt=nc
Keep your eyes open at the hamfests.

--Martin KB3UJQ




On Thu, Jul 17, 2014 at 11:37 AM, 'Lee Ciereszko' via HacDC Amateur Radio
Club <harc-list at hacdc.org> wrote:

> Objective: Combine 2 fixed frequency VHF TRs (2m) radios onto a single
> antenna. Both radios will TR at random intervals (packet).  The plan is to
> run 50w but might turn down to 25W.  This is due to not being able to put
> individual antennas at HacDC and desense.
>
> Idea: use a small (mobile size) VHF duplexer, hook up one radio to each
> side (TX & RX) tune each side to the desired pass frequency, and be done.
>
> Any suggestions?
>
> Lee  N4TCW
>
> Where's Lee?
> http://map.findu.com/n4tcw
>
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