[Elecraft] K2 keying Modification?

[Vic Rosenthal]

Martin wrote:

> Hello elecrafters,
> now that the new Firmware and Keying modification kit has arrived
> here, i am about to install the new parts.
> Long time ago, i made changes to the qsk-performance as suggested in
> 
>   http://www.qsl.net/ve3mcf/elecraft_reflect/K2_QSK_Notes.txt  .
> 
> (add a 1 meg resistor across the existing 3.3meg)
> 
> 
> Do I have to remove this resistor
> or can i leave it just as it is?

I did this modification and did not remove it when I installed the 
keying modification.  I do not believe there were any ill effects.

One thing that you should check is the adjustment of L30, the VCO 
control voltage.  The voltage should be adjusted so that it does not 
exceed 6.0 volts at 4.0 MHz, although the manual says it can be as high 
as 7.5v.  If you need to change this, check that all the bands remain 
above 1.5v.  Several of us found that the high voltage here caused a 
slight chirp when the keying mod was installed.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco