AD1 VALVO mono-plate 1940s ad1/350 tube roehre

direct heater triode ad 1 FULLY TESTED STRONG EMISSION

tube valve lampe röhre tsf 진공관 真空管 HAM RADIO audio hi-end hi-fi diy POWER AMPLIFIER Pre-Amplifier Preamp Pri stereo SE Single Ended PP Push-Pull VINTAGE POWER AMPLIFIER TRANSMITTING TRANSMITTER VALVES TUBES röhren

box 14