Topband: RX / TX antenna switching

[kolson at rcn.com]

A second for the RTR-1. Well built and reliable.

73 Kevin K3OX

----- Original Message -----
From: Herbert Schoenbohm <herbert.schoenbohm at gmail.com>
To: topband at contesting.com
Sent: Thu, 22 Sep 2016 13:35:12 -0400 (EDT)
Subject: Re: Topband: RX / TX antenna switching

I use the DX-Engineering RTR-1 which is the easiest and best solution 
IHMO.  It even provides protection by locking the RX portion out on 
Transmit by loop the PTT amp cable.  I have two of these units now and 
use them on all the Icom radios. They even have a special momentary 
toggle for check the TX antenna for A/B RX tests.  Must have been 
designed by a thoughtful amateur.



Herb Schoenbohm, KV4FZ


On 9/22/2016 1:27 PM, Gabriel - EA6VQ wrote:
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>
>
> I will appreciate your advice in the best (but simple) way to switch between RX and TX antennas for a transceiver that does not have a separate RX antenna input.
>
> The system should be able to switch from RX antenna to TX antenna when PTT is applied (and vice versa) but also allow to switch between the two antennas during reception in order to compare.
>
> I have thought about using a coax relay as I do switch the VHF preamps, but I think it's switching will possibly too slow and some RF could flow to the RX antenna, causing damage.
>
> Any ideas will be welcome!
>
> 73. Gabriel – EA6VQ
>
>
>
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