[Elecraft] K3 powers off when after several minutes of 12W carrier

[Mark E. Musick]

When I built K3 serial #3505 in September of 2009, the kit had thermal pads
for the LPA transistors.

Mark, WB9CIF

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of hawley, charles j jr
Sent: Wednesday, March 28, 2018 11:34 PM
To: Brian Hunt <huntinhmb at coastside.net>
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 powers off when after several minutes of 12W
carrier

So there was a time early on for the K3 when the pads were not installed? I
looked at my 2010 assembly instructions and they required them. So I must
have put them in.

Chuck Jack
KE9UW

Sent from my iPhone, cjack 

> On Mar 28, 2018, at 6:24 PM, Brian Hunt <huntinhmb at coastside.net> wrote:
> 
> For folks who run lots of high duty cycle modes, Elecraft is now
recommending 'thermal pads' between the LPA transistors and the bottom
cover. I found this out when I was doing some mods to my 10yo K3 and the
instructions said to install them and I didn't have 'em. You can get them
from Elecraft, not expensive. 
> 
> 73,
> Brian, K0DTJ
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