K3S High Current in 6 metre mode

[raycollins]

I have just tried 6 metre USB operation for the first time on my K3S and I
notice that as soon as I key the transceiver (without speaking into the
microphone), the transceiver draws a quiescent current of 18 Amps with a
power meter indication of zero.  When I speak into the microphone, the
current reduces as the speech level increases and the power meter display
seems to give a sensible indication.

If I reduce the power setting to below 10 Watts and then key the
transceiver, the quiescent current drops to about 3 Amps.

These standing currents seem very high; is this to be expected?  Almost
looks like the power amp is Class A biased?  Can anybody please explain what
is happening?

Ray M1FJL



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[KeithWE6R]

Hi Ray;
Look at the notes in the K3 Utility re 6m gain settings on recent FW change.
Make sure you have current (or recent) Firmware.
There is a toggle to reduce tx gain on 6m above 8W;
 set radio on 6m, above 8 watts, config menu TXGN HP, then tap 8.
You should see Atn6 toggle on (showing).
Then set radio to exactly 50W on your favorite 6m freq (TUN PWR must be
nor). Then long press XMIT to send a carrier for several seconds, then
unkey, this will reset 6m tx gain cal.
You will see the TXGN number change.
Also make sure you don't have too much mic gain, comp, or tx EQ.
Keith WE6R
Elecraft K3 Tech.
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