[Amps] Alpha 87a

[Michael Tope]

----- Original Message ----- 
From: "Dick Green WC1M" <wc1m at msn.com>
To: "'Tom W8JI'" <w8ji at w8ji.com>; "'Amps Amps'" <amps at 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....................................