[ARC5] BC-348 tuning rate and article

Hubert Miller Kargo_cult at msn.com
Sat May 9 20:03:11 EDT 2020


I was looking at the 73 Magazine, June 1963 Special Surplus Catalog Issue, page 18, "Bandspreading the BC-348."
Describes adding series capacity limiting caps to the 4 gang sections and then parallel caps also to place the bands
approximately at the same place. Says 80, 20 meter bands are now spread over 4x times as much dial travel and 
40 meters now spread 3x as large. I never thought of the BC-348 as an SSB machine and actually, I thought for CW
use the bandspread, tuning rate was adequate and certainly better than many other era receivers we have used. 
Article says these changes can be undone, if wished, in under 15 minutes. BUT - you are now dealing with a next
to useless dial readout, unless you make a new dial scale. Myself I would not execute this mod unless on an 
already plentifully hacked example and anyway, I'm not sure it's even worth it. I wonder what you the readers
think about the BC-348 tuning rate and dial as - is. I tend to think it's already adequate and perfectly usable. 

There was another article a few years later which did the same procedure and so enabled 15 meters hamband
coverage without modifying any coils. 

I have a large German receiver, an AE4139 Siemens, which had general coverage and one dial only, and someone
post war retrimmed it to 80, 40, 20, 15 and made a whole new dial scale for it. I will leave that one as - is. 
-Hue Miller 


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