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Mazda AC/HL
Mazda early high gain triode of 'short path' low
microphony design with an indirectly heated, oxide coated
cathode. This is the direct successor to the first indirectly
heated oxide coated cathode valve the Cosmos
AC/G. Anode with 'wings' and grid with a single
support. 4 volt, 1 A filament. Maximum anode voltage 200, grid bias
-1.75 volts. Anode current 4.9 mA, ra 15 k ohms, gm 5 mA/V, mu 75.
B5 base.
Here is a somewhat later Europa version. Side
supported mesh anode, spiral grid and straight through filament
with top and bottom connections. B5 base.
