[Elecraft] K2 PA Failure

[Mike Harris]

You can't turn the K3 fully on with the PSU power switch otherwise 
nearly everyone would be doing it all the time.

Regards,

Mike VP8NO

----- Original Message ----- 
From: "John Ragle" <tpcj1r03 at crocker.com>
To: <elecraft at mailman.qth.net>
Sent: Thursday, February 17, 2011 5:14 AM
Subject: Re: [Elecraft] K2 PA Failure


> Am I missing something here? Seems to me that the rational thing 
> to do
> is turn on the power supply and let it stabilize (should only take 
> a
> second or two), then turn on the K2/K3? Turning a K2 or K3 on and 
> off
> using the power supply switch never gives the firmware/software a 
> chance
> to initialize or shut down...just like pulling the plug on your 
> computer
> might well cause at least mild consternation to the machine! There 
> are
> no enormous filter caps in either Kn machine that need to be 
> serviced at
> power on. Seems to me that using a non-matched pair of transistors 
> is
> much more likely to be the cause of failure, as someone has 
> already
> pointed out.
>
> John Ragle -- W1ZI