[ARC5] Space Charge Tubes vs. Low Plate Voltge Tubes In Military Sets

[Bill Cromwell]

On Mon, 2013-03-11 at 04:33 -0800, Jim Wiley wrote:
> Gee, I didn't know they even had tubes waaay back then?! <grin>
> 
> - Jim, KL7CC
> 
> 
> 
> On 3/11/2013 3:51 AM, Bruce Long wrote:
> > I don't know about you other guys but I have been interested in 28D7s since I was a boy


I suppose in those days the nickname "Sparks" referred to the signal
fires.

73,

Bill  KU8H