Re: Ball Chain Source
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You might check with these guys:
https://www.ballchain.com
Made in the U.S, apparently, and the sizes they list are given in
standard SAE values, not me...
7 hours ago
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From: Grayson Evans
Subject: New info on the Drake 2B
To: "Bill Meara"
Date: Wednesday, January 23, 2013, 1:43 PMHI Bill,I was looking through the Dec. 1963 issue of 73 and came across an ad for a "New Mechanical Filter Modification Kit" for the 2A and 2B. IT says "like magic the Drake becomes a truly superlative SSB receiver" Model DMF-2 $29.. Says sold exclusively by Henry Radio, but does not say if they made it or not.Has a photo showing a module that plugs in (maybe a tube socket?) right behind the VFO. Module has a mechanical filter (Collins I presume), two IF transformers and a tube (probably the tube it substitutes for). I have been looking through a bunch of old CQ's and 73's, early 60's, and I only saw this one ad. Probably a rare accessory, but how knows.Thought you might be interested.Take care,GraysonTA2ZGE - Ankara, TurkeyKJ7UM