[Collins] 51J parts

[Bill Kirkland]

Visually all the RF slugs look the same. I haven't measured them.
The IF rack does have slugs with differing lengths of ferrite as well as 
wire length.


>From: "Lawrence Mayhew" <lmayhew4 at comcast.net>
>To: "'Bill Kirkland'" 
><kirklandb at sympatico.ca>,<geraldj at storm.weather.net>,<collins at mailman.qth.net>
>Subject: RE: [Collins] 51J parts
>Date: Wed, 30 Apr 2008 10:51:36 -0700
>
>While we are on the subject of the L-105 coil for the 51J series, may I ask
>about the "tuning slugs"? Somewhere I got the idea that the slugs in the
>tuning rack were not all the same permeability. I can't confirm it in the
>technical literature. Anyone have an experienced opinion?
>Regards,..........Larry in Seattle
>
>-----Original Message-----
>From: collins-bounces at mailman.qth.net
>[mailto:collins-bounces at mailman.qth.net] On Behalf Of Bill Kirkland
>Sent: Wednesday, April 30, 2008 10:05 AM
>To: geraldj at storm.weather.net; collins at mailman.qth.net
>Subject: Re: [Collins] 51J parts
>
>I've sent Ed the part.  The coil forms are tricky because they belong to a
>sub-assembly
>which includes the tuning trim cap.  They are mounted as a package in the 
>RF
>
>section.
>It would need to have identical characteristics as the other two coil forms
>used in the
>RF deck for that band grouping so that they all track together as the 51J 
>is
>
>tuned
>either across the band or as the band switch is changed.
>
>If folks are interested, I can remove an another sub-assembly and 
>photograph
>
>it.
>
>I didn't check the winding on L105 but I do know that the windings on some
>of the
>coil forms connected to the IF tuning rack are not uniformly spaced wound.
>
>
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