[Milsurplus] BC-654

[Thomas Adams]

At 15:36 21-09-09, Robert Nickels wrote:
>I recently acquired a BC-654 receiver/transmitter in good condition, but
>some of the tubes are missing.  The VT-121s (3Q5) won't be a problem,
>but I'd appreciate any suggestions on where I might find the VT-225
>finals.    The commercial designation is 307A, and WE and National Union
>seem to be the only suppliers.   Or has anyone substituted different
>tubes, maybe via a socket adapter?
>
>I'd also like to find the power supply connector (female) that mates
>with the one on the panel, if anyone has one or knows the proper
>designation.
>
>If anyone is interested in a BC-654 parts radio, let me know as I may be
>able to help you out.
>
>Thanks and 73,
>
>Bob W9RAN


Howdy, Bob!

You've just encountered the big GOTCHA! with BC-654s.

The 1948 Editors and Engineer's Radio Handbook claims that the 307A 
was used in ONLY
ONE hunk of equipment; the BC-654!

The 307A is suppressor grid modulated, so that obviously means a 
suppressor grid type
tube is needed, unless you want to run CW only...  in which case I'd 
rewire for the 807.

Best bet with a suppressor grid, IMHO, is to look at the 837, the VFO 
tube from the ART-13.

Re. your parts radio...  I'm betting you can't help on this one, but 
I've been looking high and
low for the telegraph key cover. I've got the base, and even the 
oddball original key... but no
cover.

Mr. T., W9LBB