[Elecraft] K2 power output tests at low supply voltages

Wed Nov 20 16:55:01 2002

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). 