>From QST, September, 1952 Class B modulator. The 12AX7 modulator tube delivers approximately 6 watts output.
>From QST, November, 1951 A Deluxe Mobile Transmitter for 14 and 28 Mc. Two 12AX7s- each tube having similar elements in parallel- operate at zero-bias in Class B modulator circuit which delivers approximately 15 watts output. (300 volts) ARRL Mobile Manual 1st edition, page 178, The modulator employs a type 12AX7 tube and delivers approximately 7 watts output. 280 volts resting 10 ma, peak 30 ma. QST, December 1956 . 10-12 watts input 50 mc mobile transmitter designed to operate on the most INEXPENSIVE power supply readily available (for mobile) . The modulator tube is a type 12AX7.....the modulator plate current should jump 20 to 25 ma above the no-signal value of 6 ma. >From ARRL Handbook, 1960, 37th edition, page V17, 12AX7, 300 volts, 0 volts grid bias load resistance 16 k ohms output power 7.5 watts.
