From: Ron Wagner 
Subject: Re: [Drakelist] Soupcan Filters


Seems to me that QST (and the Hint and Kinks book) had an "improve your 
R4B.." in.  They took two xformers and the xtal filters from the T4XB and 
wired into the IF.  As I recall, a bit messy, but do-able w/o holes and 
then reversable as long as you keep the old parts.  Oh yes, and the 
filters and USB/LSB switch were outside the rig via coax. If you need, I 
can scan the H&K article as I am fairly sure I have that book.
73,
Ron
-- 
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Amateur Radio Station: WD8SBB - Ron  and  KB8NRP - Joann
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On Sat, 11 Jan 2003, Tim Kass wrote:

> 
> If I recall, the soupcan filters inside the TR-3 and early TR-4's are only 4 
> pole xtal filters..the later versions of the TR-4 and TR-4C are 8 poles...is 
> INRAD talking about replicating the 4 pole variety....If I had to replace 
> mine I think Id put in the 8 pole xtal filters .... Id like to find tighter 
> xtals for my R4B without putting in another IF can and retaining the various 
> selectivities...only at an 8 pole variety....Tim  K8WBL
> 
> 
> 
> Timothy Kass
> 


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