[Elecraft] final test K2

Thu Jan 29 00:42:01 2004

Ed,

It sounds to me like the current draw of the K2 is dragging the voltage of
your power supply quite low (you did say it was 'wimpy').  I think your
problems will go away when you get a 'stiffer' power source connected - one
that will allow more current before the voltage begins to sag.

The voltages will usually look fine until you start drawing current from the
supply that is beyond the limits of the supply.  If the K2 'resets' itself,
that is usually a condition brought on by too low a supply voltage (under
load).

73,
Don W3FPR

----- Original Message ----- 

I just started the final test and I hope I have a wimpy power supply. I
tried the first 2 watt 40 meter transmit test and the rig reset, showing the
"elecraft" boot message.  The only way I can keep it in transmit is to turn
the power down to 0.1 watt.

I have good collector voltage (no short) on the push/pull finals, and the
driver voltage looks ok too.  I have the tx current set to the recommended
3.5A.

I have the k2 running from a supply I thought would do a few amps.  It used
to power a 10w 2m fm rig.  I will try it tomorrow on my main 12v supply
which is good to 30A.

Is there any way the k2 would not reset at min power and reset slightly
above that?  as i turn the power up it dies at .2w .   maybe the power
spikes and kills my supply, if the power feedback detection is slow?

any suggestions welcome!

i started poking around looking at voltages with the power turned all the
way down so it would stay in TX.  no gremlins there yet...

(i have lots of test equipment, so there is no panic.)

tnx,
Ed wa3drc

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