[Elecraft] KXB3080 power questions

[Don Wilhelm]

David,

Spreading the turns of the low pass filter toroids may give you a better
spread of power across all the bands.  With a 13.8 volt supply, I typically
expcet close to 4 watts on 80, 40 and 30, and about 3.5 to 3.8 watts on 20
meters using a 14 volt power suppy.  Yes, the major contributor to power
output deviations from these values is the L1 and L2 toroid inductors.  The
transformer T1 is a secondary candidate for power output vsriation.

Proper caslibration of the KXAT1 wattmeter is essential to determining the
actual power output, but the difference between bands is likely a function
of the Low pass filter inductance.

73,
Don W3FPR


> -----Original Message-----

>
> I just finished installing my KXB3080, which seems to work fine.
> Using my DL-1
> dummy load I noted the following power ratings?
>
> When I first tested it I got the following power readings with R4 fully
> clockwise:
>
> full power:
> 20m: 2.8w
> 40m: 3.5w
> 30m: 3.7w
> 80m: 6.3w
>