[Elecraft] My K2 is off steriods

Tue Jan 22 22:28:00 2002

Version 2 f/w lets you set a limit for the 28MHz 10m band so you don't
overdrive the PAs into distortion.

It's in the Secondary Menu.

Gary Surrency AB7MY

On Tue, 22 Jan 2002 17:21:02 -0800 Vic Rosenthal <[email protected]>
writes:
> Well, I have undone my high-power K2 experiments and am back to 15 
> watts.  By
> adjusting the FWD control in the KAT2 to fool the firmware, upping 
> CAL CUR to
> 4.5, turning up the power supply to about 16v (which gave about 15v 
> after the
> fuse and protective diode in the K2) and adding a turn to the 
> secondary of the
> final output transformer, I got
> 
> 160-40m  22 watts
> 30-17m   20
> 15m      18
> 12-10m   16
> 
> This was enough to drive my amplifier to reasonable output.  
> However, on the
> downside:
> 
> 1) On 10/12 m, if I advanced the power control beyond the point at 
> which it
> delivered 13w, nasty clicks appeared about 1 or 2 KHz off the 
> transmission
> frequency.  I was afraid that it would be too easy to do this in the 
> heat of a
> contest.
> 
> 2) The output filter toroids appeared to have been heated a bit.  
> Maybe I'm
> imagining things...
> 
> 3) The power output and swr indications were incorrect, and
> 
> 4) I was afraid to use the KAT2.
> 
> So I'm back to the normal 15 watts on 160-15, and 13w on 12-10.  I 
> guess I'll
> wait for the KPA100. 
> 
> 73,
> Vic, K2VCO
> Fresno CA
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Gary Surrency AB7MY
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