[BC] The last of the tube 1000 watt transmitters

[John Lyles]

Wasn't the 828C1 Power Rock (later Continental 314R1) their last tube 
1 kW? It had a single 3-500Z class S (PDM) modulator with a pair of 
the same for RF. I think it was circa 1980 or 79.
John Lyles

 > From: dynotherm at earthlink.net

 > The Collins 20V3 was basically the 20V2 in a cheaper cabinet. It
 > used the same 4-400's as the 20V2 etc. Pretty box but IMHO never
 > lived up to its name tag. I suspect it forced RCA to bring out
 > the BTA-1R's when they had a very good BTA-1M triode (833) design.
 >
 > The Collins/Rockwell/Continental was the 820D1 and 820D2. It
 > used two pair of 5-500A's although some were converted to 4-400's
 > in the field. The AF and RF drivers were SS and there was no
 > variable loading coil. It was a beautiful 1 kW box, and the 820D2
 > was probably the last tube PA design ever built except for the
 > Harris BC-1H which some would argue because of the SS drivers
 > did not belong in the same class at all.