>Tom,
>
>>To cure the problem, he needs to switch to a large gauge
>>conductor in the rollers.
>I'd be interested in your comments regarding the Palstar roller (5Kw+ &
>$225.00 US) which they sell separately as well as incorporating in their
>4Kw tuner?
>
>www.palstarinc.com
>
>Phil G4ZOW
Phil,
I went up to Piqua, Ohio yesterday and dropped in on Palstar. Great
products! and great hospitality! I'm surprised that I never heard of them
until now... Apparently most all of their business is mail order. They are
a very small company, but they seem to be tailored to a very high-quality
product line.
Anyway, the roller inductor you mention is very, very, sturdy and extremely
well constructed - as are all their products. It is not inexpensive, but I
don't think you will find a better roller inductor...
I really liked their high-power tuner - very impressive!
The layout of the tuner is real slick. They kept all of the RF leads and
inner connections very short. And the antenna switch is very robust - the
type of thing you would expect to see in a commercial high power amp. The
tuner even uses a Jennings vacuum relay to switch in extra capacitance, and
the balun is on the coaxial input for balanced loads. That way, the balun
never is subjected to a wide range of complex impedance... The swr bridge
is very well done. I think they use this swr bridge typology in their other
swr meters too.
Anyway, their roller inductor is top-notch construction. They also make
some nice, very robust variable capacitors...
I know what I'm putting on the Christmas wish-list - now if my wife will
just knit a stocking big enough for the tuner ...
73 de ki6sz
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