MHL4 Marconi Osram balloon mesh plate audio triodes equivalent 154V 164V 41MLF

Marconi MHL4 balloon mesh plate £ 400 pair.

Osram MHL4 balloon mesh plate £ 400 pair.

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Description

The Marconi balloon MHL4 is a medium impedance triode used as audio amplifier, phase reversing valve, oscillator etc, In general its chief use lies in stages where the M valve of the MH41 or MH4 is too high for the circuit requirements,

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