[Elecraft] RX antenna protection

[Vic Rosenthal]

I disagree. A good preamp like the DXE preamps can handle large signals and still be linear. That means they can output a lot of power. Do not assume you are safe if there is a preamp unless it is a lousy one!

Vic 4X6GP 

> On 15 Aug 2017, at 18:07, Ignacy <no9e at arrl.net> wrote:
> 
> If a receive antenna has a preamp, there no need to do any antenna guard
> since the preamp cannot destroy K3. 
> 
> I used K9AY, K7TJR 3 el array, and a Wellbrook loop close to transmit
> antennas. None was turned off during transmit.  Both have preamps and
> nothing was damaged despite running a  KW. Of all 3, K7TJR was the best by
> far. 
> 
> BTW, the RX ANT input in K3 is protected by a RF activated relay.  
> 
> Ignacy, NO9E