[Elecraft] New Output Power Issue

[Lyle Johnson]

Might not be a 30W drop, but a matter of calibrations of both the 
internal wattmeter (there is a menu item to adjust it) and the external 
wattmeter.

If the output power is set to 100W and the internal wattmeter is 
reporting 100W, then the K3 is happy.  If in fact the output power is 
only 70 W (double check if the ATU is bypassed or in line, antenna 
wiring and chassis connections are tight int he k3 etc), then the K3 
wattmeter may need to be calibrated.  If that is the case, you need to 
go to the menu and adjust it.  But only do this if you are CERTAIN your 
external wattmeter is in fact accurate. Once you are certain the K3 
wattmeter is reporting within spec, re-run the Tx calibration.

BTW I think a 2V drop is still excessive.  Might be long runs or light 
gauge wire or ?  But that is a separate issue from the wattmeter accuracy.

73,

Lyle KK7P

> It is highly possible the culprit is my RigRunner, purchased in March 
> of this year. When I took it out of line, the voltage drop went from 
> over 4V on tx to under 2V (13.8V down to about 12V). Current draw is 
> .78 to .82 amps on rx and 19.8 amps on tx. However, while the internal 
> power meter shows 100W, an external meter into a dummy load only shows 
> 70 watts out. The current and voltage readings look normal, according 
> to Rev. D10 of the owner's manual. But I'm still concerned about a 30W 
> drop at the output. Anyone have any other suggestions?