1. The pentode preamp tube is a 5879 with EL84 output tubes . 2. Fender Twin Reverb amplifiers use four output tubes , of the 6L6GC type. 3. It can be further lowered by applying global negative feedback or paralleling more output tubes . 4. He has also built the ultra-radio except for completing the high-power output tube . 5. The rectifier and audio output tube required more heater power, so dropped a larger voltage than the other tubes. 6. The second triode is a phase inverter, which creates mirror images of the signal to drive the output tubes . 7. Fisher's first receiver was the model 500, a mono AM / FM receiver using two EL37 output tubes . 8. The radar set operates in the 5450 to 5825 MHz range, using a coaxial magnetron as the transmitter output tube . 9. The 807 also found some use as a horizontal output tube in early TV receivers, particularly those manufactured by DuMont. 10. Page developed the ring oscillator, allowing multiple output tubes and increasing the pulse-power to 15 kW in 5-�s pulses.
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