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!
This file was last modified
10:05:06, Thursday February 24, 2022