[Elecraft] RF feedback

[Dave Hachadorian]

----- Original Message ----- 
From: "Vic K2VCO" <vic at rakefet.com>
To: "Richard S. Lindzen" <rlindzen at MIT.EDU>
Cc: <elecraft at mailman.qth.net>
Sent: Friday, December 05, 2008 6:10 PM
Subject: Re: [Elecraft] RF feedback


> There is a so-called "pin 1 problem" in the K3's mic input 
> circuitry. The fix is to jumper L4 on the front panel 
> board and L7 on the KIO3. These are RF chokes in the mic 
> return lines.
------------------------------

I just did these mods today, along with the audio upgrade 
mods. I was too lazy to pull off the front panel to get to 
L4, so I just jumpered pin 8 on the mic plug (not the jack 
on the K3) to the metal shell of the plug.

Dave Hachadorian, K6LL
Yuma, AZ























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