The guy who said to measure the voltage at the K3 gave you good advice.
An easy way to do this is to tap the DISP button and turn the VFO B knob
until it shows the voltage. Then see how much it drops during transmit.
Since the K3 tries to produce the requested power with whatever voltage
it gets, low voltage can cause excessive current draw. You should have
at least 12v, preferably more than 13v when transmitting a steady
carrier. If it drops more than half a volt when you transmit, there may
be too much resistance somewhere in the connection to the power supply.
The other thing is that some combinations of resistance and reactance
seen by the final amplifier produce higher current draw than others.
Maybe you are seeing a combination of these effects.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 03-Feb-2022 23:11, Ronnie Hull wrote:
I have had my K3 back to Elecraft repair TWICE in less than a year
Got it back finally yesterday and put it on the air this afternoon
Running 80w on CW on 20M and getting a high current alarm.
What the heck? Does it have to go back AGAIN?
Man I was close to pulling the trigger on a K4 but all thoughts out the window
now
Anyone know what this might be? Using a 50Amp power supply
Ron W5SUM
Sent from my iPhone
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