Re: K3 & L4B

Posted by Vic Rosenthal on Jun 07, 2012; 8:52pm
URL: http://elecraft.85.s1.nabble.com/K3-L4B-tp7557238p7557261.html

This is not a good idea for CW operation, unless you keep the speed below maybe 20 wpm.
The extra TX delay will severely upset the timing of CW elements (with either an external
or internal keyer) at higher speeds.

A QSK modification is a very good idea for CW or VOX SSB operation with this amp, as
someone has already mentioned.

On 6/7/2012 6:49 AM, Rick Stealey wrote:

>
> I am.  Usually ok, but recently it gave a little snap when I hit the key.
> This can be caused by the rf from the K3 hitting the L4B before its slow relay is
> closed.  So I increased delay TX DLY from 8 to 20 milliseconds and it
> cured the problem.  My L4B has a transistor driver on the PTT line but
> this is not supposed to be necessary with the K3.  But it doesn't change
> the key up time like an external relay would, and the cost was zero.
>
> What's your call, Keith?
>
> Rick  K2XT  
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--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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