----- Original Message -----
From: "Dick Green WC1M" <wc1m@msn.com>
To: "'Tom W8JI'" <w8ji@w8ji.com>; "'Amps Amps'" <amps@contesting.com>
Sent: Monday, January 01, 2007 5:48 PM
Subject: Re: [Amps] Alpha 87a
> The 87A input network uses air-wound coils on 10m and 12m, so they'd have
> less adjustment range than the iron toroid coils used on the other seven
> bands. In fact, the 10m coil has only two turns! 73, Dick WC1M
>
Dick,
Its been my experience that air wound inductors (in general)
are very sensitive to turns spacing. I'd be surprised if they
were less sensitive to turn spreading (on a percentage change
in reactance basis) than the iron powder core inductors.
73, Mike W4EF....................................
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