[Elecraft] K2 power output tests at low supply voltages

Wed Nov 20 17:44:00 2002

Yes, it works down to about 8.5 volts in receive mode. If you had the 95SQ015
diode, you would have gained some additional operating time (or power).

Wayne

Sverre Holm - LA3ZA wrote:
> 
> I just tested an aircraft emergency locator transmitter battery with
> indicated voltage of 13-14 Volts (no load) on my K2. A fellow ham here
> has a large supply as they are routinely replace every year for safety
> reasons.
> 
> So now I understand why I got reports of modulation on my 5W CW when the
> indicated voltage dropped down to 8.5 Volts or so. I guess the low drop
> 8 Volt regulators get a hard time then.....
> 
> 73 Sverre
> LA3ZA
> 
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of Wayne Burdick.
> >
> > On 20 meters, both K2s I tested could easily put out 10 watts
> > in CW mode down to as low as 9.5 volts, and 5 watts down to
> > as low as 9.0 volts. In both cases, there was absolutely no
> > hint of frequency shift or other artifacts, and no change in
> > the CW keying waveform (as observed on a scope).
> 
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