K3 current draw

[Elecraft mailing list]

Morning group,

After spending some time searching, I cannot find a table of measured current draw versus power output for the K3. I’m working on how much battery I need for portable ops and this information would be good so I can estimate the energy requirements for my system.

There is an old pointer to the K9XC website, which has apparently gone away. So, any help would be appreciated. If the work has already been done, I’m not interested in doing my own experiments.

Best...

David Thompson, AG7TX
Jack of All Trades
Master of None
[hidden email]




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[KeithWE6R]

Hi David;
You can tap DISP and rotate VFO B knob to see the current. Then set "tun
pwr" to nor, select desired power out, and long press XMIT to send a
carrier and see the current.
(do not TX at exactly 5 or 50w as that will cause a TX gain calibration).
That will give you a close reading.
The RX current depends a lot on if you have a sub receiver or 2m module
but you can watch RX current and change options to see the changes.
If you design a system for 2Amps on RX and 25a on TX, that would give
you plenty of overhead.
Keith WE6R
Elecraft K3 Tech.

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