[ARC5] The Bandspread BC-475A Transmitter

[Roy Morgan]

Arc-5 folks,

I have here the following transmitter and would like to find the article that I assume was published telling how to do the band spread modification:

BC-457A  Unfinished aluminum.  This one has been modified to spread the band out to the 80 meter ham band. The dial has been re-calibrated by painting over and scratching in the new frequencies.  One of the rear tube sockets is marked for “crystal” so it might be re-worked for use with crystals only.  This one has a flower pot type cap inside - taken from a receiver, perhaps?  The key jack and switch are wired to both final tube and the 1626 also.  I think that some plates have been removed from the main tuning capacitor (s).

This transmuter, and a 40 meter one, were given to me in the late 50’s or early 60’s by a nearby ham.  I don’t remember ever having them on the air.  It’s about time!

Any leads to articles gratefully received.

Roy

Roy Morgan
k1lky68 at gmail.com
K1LKY Since 1958