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List of known Marconi / Osram A-number (special purpose) valves
A166 | P610 |
A298 | U14 |
A334 | Selected PX4 |
A373 | HF voltmeter diode |
A491 | Selected MSP4 5-pin met. |
A537 | Triode for microphone amps |
A552 | N41 pentode |
A577 | Valve voltmeter |
A580 | Low impedance triode |
A638 | Double P2 |
A726 | As MH40 but 13v heater |
A748 | Double D42 for GEC TV diode use |
A792 | H30 to special tests for EMI |
A800 | (CV412) |
A802 | MHL4 with copper clad getter |
A819 | Selected KTZ41 (CV1698) |
A831 | Battery charger |
A855 | Like KT66 but with anode top cap, 4v 2a |
A864 | Output tetrode for EMI 13v 0.6a |
A883 | Like D42 but with anode top cap |
A901 | 5.2v 1.5a IHC output tetrode (CV1722) |
A915 | (CV1462) |
A915 metallised | (CV2803) |
A915A metallised | (CV2804) |
A922 | IHC diode for TV |
A924 | Double L21 (CV2805) |
A943 | KTZ63 tetrode with cathode connection brought out |
A950 | 13v 0.45a version of KTZ41 for EMI |
A964 | P410 photocell relays |
A980 | H30 with extra high h/c insulation for EMI |
A1065 | (CV1343) |
A1834 | (CV2523) |
A1835 | (CV2523) |
A2087CL | (CV8733) |
A2196 | (CV3920) |
A2223 | (CV10706) |
A2744 | (CV4105) |
A2975 | (CV10813) |
Compiled from "The Saga of Marconi Osram Valve", the CV Register, other references and valves in my own collection. Please do not copy without reference!
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