[BC] Collins & Continental Tubes

[Dave Hultsman]

In a message dated 2/28/2012 9:41:41 AM Central Standard Time, miltron at att.net writes:
>Collins / Continental all used the 4CX15000 in 20s; I believe Continental pushed it as far as 35kW
RCA, GATES, COLLINS & TTC All manufactured 20,000 Watt FM transmitters using the 4CX-15,000-A Tubes. The 4CX-15,000A tubes were manufactured and/or labeled under labels by Westinghouse, General Electric, Machlett, RCA, Eimac and others.  One Eimac specification sheet clearly showed the
4CX-15,000A from Eimac tested for FM Braodcast service at 25 kW. on 107.9 mHz.  Continental pushed the tube to 27.5 kW.  The first transmitter went to Oklahoma City, OK. in 1981.
 
  Collins FM Tube Line Up   (Last Collins transmitter left the dock September 30, 1980, Collins sold to Continental Electronics)
 
831D-1/2 2.5 kW., 5CX-1500-(A/B) Tube
831E-1,   5 kW. ,  4CX-5000-A Tube
831F-1,  10 kW.,  4CX-5000-A Tube
831G-2  21.5 kW.,  4CX-15,000-A Tube
831G-2B 22.5 kW., 4CX-15,000-A Tube
831G-3  25 kW., 4CX-15,000-A Tube
 
Continental Electronics FM Tube Line Up
814R-1/2.  2.5 kW., 5CX-1500-B Tube
815A-*  ,  4.3 / 5 kW., 4CX-3500-A Tube
816R-1A, 10 kW.,  4CX-5000-A Tube (3 Cabinet)
816R-1A*, 10 kW., 4CX-10,000-A Tube (3- Cabinet)
816R-1B, 11 kW.. 4CX-15,000-A Tube (3-Cabinet)
816A, 11 kW. 4CX-15,000-A Tube, (2-Cabinet)
 
816R-2*,  21.5 kW., 4CX-15,000-A Tube
816R-3*,  25 kW., 4CX-15,000-A Tube
816R-4*, 27.5 kW., 4CX-15,000-A Tube
 
816R-5*, 35 kW.,  YC-130 (4CX-15,000-J) Tube
816R-5*, 38.5 kW.,  4CX-20,000-E Tube
816R-6*, 30 kW.,  4CX-20,000-E Tube
 
817-A,  60 kW.,  4CX-60,000A Tube
           (Thirteen built all returned & scrapped)
 
The EEV  (English Electric Valve) 4CX-15,000-A Tetrode
had emission capabilities for the 816R-4*,  816R-5* & 816R-6*
transmitters to 35,000 kW.  (Tubes Discontinued)