Topband: FW: Front End Saver for Top Band

[Petr Ourednik]

Rodger,

I built several of them for my station as same as for our local contest
club station and all works like champ. (Martin's version)

State nr. 1
QSK T/R is floating
Re1 - closed
Re2 - open
Re3 - open
In this case ANT port is connected to RX input port and AMP port is
floating. 

State T/R is grounded
Re1 - open
Re2 - closed
Re3 - closed
In this case ANT port is floating, RX input port is grounded and AMP
port is grounded too. 

Hope it helps. 

73 - Petr, ok1rp

On Fri, May 30, 2014, at 09:50 AM, rodger bryce wrote:
> 
>  
> From: gm3job at hotmail.com
> To: gmdx at yahoogroups.co.uk
> Subject: Front End Saver for Top Band
> Date: Thu, 29 May 2014 18:45:14 +0000
> 
> 
> 
> 
> Has anyone built the front end saver by KD9SV or the OK1RR version which
> uses 12 volt reed relays.
>  
> I am attempting to build the 12v version on veroboard and have the
> following query, when the unit is supplied with 12v relays 1 & 2 are
> energised, when the PTT is operated relays 2 & 3 are energised basically
> relay 2 remains energised at all times, is this the correct sequence of
> operation?
>  
> thanks Rodger/GM3JOB 
>  		 	   		   		 	   		  
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