On Fri, 10 Oct 1997 15:38:55 -0400 (EDT) Jeffrey Maass
<jmaass@freenet.columbus.oh.us> writes:
>
>Has anyone used Amidon ferrite toroids for the matching and reflection
>transformers in a Misek-style 2-wire SWA/Beverage? He specifies the
>high-permeability cores that he sells: I have a variety of high and
>low permeability Amidon cores of various sizes on-hand.
Misek lives 1 mile from here BTW. Lots of talk for a single 2 wire
Beverage on a small lot. IMO most of his book is talk and no real tests.
Those .5" pearmilibity 10,000 cores make nice dummy loads and are great
if your concern is a 1:1 VSWR across HF plus a need for a preamp.
For lower loss and good 1.8-14MHz performance use a FT114-61 core.
Quadrifilar winding (16T of #24 or 26) will also allow you to split off
the primary and secondary grounds if necessary.
Just my opinion.
73 Carl KM1H
>What have others done with these?
>
>73,
>
>Jeff Maass (jmaass@freenet.columbus.oh.us) Amateur Radio
>K8ND
> USPSA/IPSC # L-1192 NROI/CRO NW of Columbus Ohio
> 25000 Members in 2000!
>
>
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