Oh, I though you start with the capacitors at maximum capacitance, or
is that for the "SPC" or the Ultimate transmatch design? I am building a
transmatch using the variable toroid inductor that Ten Tec used in their
small tuners, which I believe were "T circuits. The inductor
construction does not lend itself to series use in a "L" network because
the adjustable tap is grounded to the shaft and mounting bracket, but
maybe I could insulate it. Maybe a mid-course design change is in order:
an L might work better than a T.
The lowly but indispensable transmatch is one of the few items that can
be homebrewed better than many commercial one on the amateur market.
73,
Bob WB2VUF
tongaloa wrote:
>
> Well it was the MFJ that seemed to be eatin half my watts.
> The T match (hombrew) worked great. Set C's to low value,
> find resonance with L, peak with C's.
> I suspect the MFJ just loses a lot in the tiny components...
> My traveling 'tuner' is a BCB variable cap, a hand wound coil,
> and some clip leads. Just lay the parts out on the table top, rock,
> or whatever is reasonably flat and non conducting. TX output
> is a pair of 24" clip leads to the matchng network and antenna
> is wire tossed up and out in opposite directions. Simple and works.
>
> -Bob
>
> Robert & Linda McGraw K4TAX wrote:
>
> >Yes and most T networks have 2 or more points in which the Z match with
> >complex Xl and Xc values can be obtained. Unfortunately only one is
> >correct. The other one(s) is(are) always very in power/signal loss.
> >
> >That's why I always use L networks such as the Tentec 238 etc.
> >
> >73
> >Bob, K4TAX
> >
> >
> >
>
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