[Elecraft] K-3: Unswitched Rx Ant

[K5WA]

Dick,

My 1000' beverages are WAY too close to my 160 phased vertical array (about
100' max at the closest point) running the legal limit power but I have zero
RF getting back into the K3 when transmitting and I use NO external relays
to protect the K3.  I have K3 S/N 234 and 752 and I believe I remember
adding the strong signal overload mod since these are older models, but I've
only seen that COR activated one time when I was playing around on the
workbench.  I've never seen it kick in during normal operation.  Something
has to be abnormal with your installation or the rig itself.  Like Wayne
says, K3support at elecraft.com can help you figure it out.  

I hope to see you this weekend in the CQWW 160 contest because I'll be
plowing away to the best of my staying awake powers.  ;-)

GL,
Bob K5WA


>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Message: 26
Date: Tue, 25 Jan 2011 01:18:25 EST
From: RLVZ at aol.com
Subject: [Elecraft] K-3: Unswitched Rx Ant
To: elecraft at mailman.qth.net
Message-ID: <32f20.74153427.3a6fc531 at aol.com>
Content-Type: text/plain; charset="US-ASCII"

Hi Guys,

Please correct me if I'm wrong, but I believe the K-3 Receive Antenna is 
unswitched during tranmit... which allows high RF to get back into the 
receiver.  That's sure the case when using my beverage for receive and
transmitting 
on 160-meters.  (sounds like my K-3 is going to blow up)  I'm wondering why 
this is the case.  Couldn't an inexpensive relay be added to the KXV3 to 
prevent his problem?

I'd appreciate knowing what others are doing to prevent your K-3's from 
blowing up while using  beverages on 160-meters!  Is everyone building an 
external relay box just to switch the beverage off during transmit?  

Thanks & 73,

Dick- K9OM