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RCA BTA-1R2 A popular 1KW AM transmitter. Plate modulated using 2, 4-400A vacuum tubes in the modulator and a pair of 4-400A in the RF amplifier.
RCA BTA-5T1 Plate modulated 5KW AM transmitter. Uses a single 5762 triode in the power amplifier and a pair of 3X3000AF1 in the modulator.
RCA BTA-5U/10U Beautiful sounding plate modulated 5KW AM transmitter. Esentially the same as the BTA-5T but with provisions for upgrade to a 10KW power level. For 5KW the BTA-5U used a single 5762 in the final amplifier, the BTA-10U version used a pair of the 5762. Both versions use a pair of 3X3000F1 in the modulator.
RCA BTA-50H1 50KW AMPLIPHASE AM broadcast transmitter. the oscillator signal is buffered and then seperated into two channels 180 degrees apart through 2 DC mod stages and adjusted to a phase difference of 135 degrees. 2 1614 tube in the PA with 4 5692 tubes in the phase modulator.
RCA BA-6A The legendary limiter compressor amplifier used as a peak limiter for AM, FM and Television. Regarded for its BIG sound. Uses 6SK7 tubes as the variable gain stage, 6J7 voltage amplifier stage and 6V6 output tubes in a push pull circuit topology....I own one personally and the manual is available for purchase on this site.
RCA BW-66F Modulation Monitor. Capable of operating with low input power, no input tuning and was capable of indicating positive and negative peaks. An operating manual is available for purchase on this site.
"I have collected so much RCA gear that when I get older my hair will turn umber grey"
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