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Thursday, January 24, 2013

Drake 2B Filter Madness!


Wow, WB4HFN has ALL the details here: 

http://www.wb4hfn.com/DRAKE/DrakeArticles/HenryFilter01.htm

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Grayson:  Good to hear from you on this snowy morning in DC.   Wow, that's a bit of 2B history I hadn't heard of. Seems like a bit of overkill to me.  Maybe it was aimed at people who were unconvinced of the effectiveness of the LC filters?   Somehow, to me, it just doesn't seem right.  If you want more selectivity from a 2B, the thing to do is Q multiply using that socket on the back.  73  Bill 

--- On Wed, 1/23/13, Grayson Evans wrote:


From: Grayson Evans 
Subject: New info on the Drake 2B
To: "Bill Meara" 
Date: Wednesday, January 23, 2013, 1:43 PM
HI 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,

Grayson
TA2ZGE - Ankara, Turkey
KJ7UM



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