Comtech based 13cm tranceiver

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G8put
Posts: 4
Joined: Fri Sep 07, 2012 11:51 am

Comtech based 13cm tranceiver

Post by G8put » Mon Nov 11, 2013 6:54 pm

Hi,

I've just received the comtech 13cm TX & RX boards along with the controller.

Can anyone advise what I should use for an aerial changeover relay?

Best regards
Chris, G8PUT
Best regards
Chris, G8PUT

M0DTS
Posts: 443
Joined: Sun Feb 24, 2008 9:03 pm

Re: Comtech based 13cm tranceiver

Post by M0DTS » Tue Nov 12, 2013 12:27 pm

Hi Chris,

You can get SMA RF relays from ebay but they are not that cheap anymore... ~£25 for 12v operating ones, sometimes less for 28v versions.

An alternate option is to use a diplexer with one antenna for both Tx and Rx as long as they are on different frequencies - repeater use.
I have some diplexers available (they are quite big!) the only problem there is that you are fixed to certain frequencies.

Rob
M0DTS

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