[AMRadio] 4-400 first made when?


Rick Brashear rickbras at airmail.net
Fri Mar 23 20:49:14 EST 2007


Good idea, Craig.  However, what I'd like to know is when did RCA start
making them?

73,
Rick/K5IZ
To All,

Looking at an old 1958 ARRL handbook, the 4-400A is listed in the tube data
pages. Can't go back further. This is the oldest in the library, besides I
was but a mere lad at that date.

73's
wd8kdg
Craig






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