Topband: RX / TX antenna switching

[Herbert Schoenbohm]

The RF Sense MFJ type of switch box are cheap but do have limitations.  
The DX-Engineering  RTR-1 is a bit more money but is considerably more 
user friendly with some added features like being able to check the RX 
antenna vs the TX antenna either with a momentary toggle switch or with 
the same switch in the up position which immediately reverts back to the 
TX antenna for RX.  I have two RTR-1's in the shack and they are well 
Engineered for the discerning low band DX-er with status lights and 
front panel control in a box in front of you. It also has the PTT safety 
lock out feature.



Herb Schoenbohm, KV4FZ


On 9/22/2016 4:33 PM, Charles Moizeau wrote:
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> ea6vq_ml at dxmaps.com
> ________________________________
> Gabriel,
>
> View two products from MFJ enterprises, MFJ-1707 and MFJ-1708.
>
> 73,
>
> Charles, W2SH
> ***********************************************************************************
>
> From: Topband <topband-bounces at contesting.com> on behalf of Gabriel - EA6VQ <ea6vq_ml at dxmaps.com>
> Sent: Thursday, September 22, 2016 1:27 PM
> To: 'Topband'
> Subject: Topband: RX / TX antenna switching
>
> 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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