RE: KXB3080 power questions
Posted by
David Toepfer on
Aug 19, 2006; 4:25am
URL: http://elecraft.85.s1.nabble.com/KXB3080-power-questions-tp392537p392539.html
After some pushing the LPF turns back and forth I was able to get all bands
between 3 and 4W with a gel cell supply. Which I guess means it's time to get
out and throw some wire in a tree. Thanks for all the help.
David, k3tue
.
--- Don Wilhelm <
[hidden email]> wrote:
> 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
> >
>
>
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