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Audio output Triodes II

LS5A Osram balloon of 1924 dull emitter valve made for audio amplification POVT39

Osram LS5A GBP 375 pair.

LS6A Marconi Osram balloon – LS6A Marconi Osram balloon top pip

LS6A Osram balloon £ 1,000 pair.

LS6A Osram balloon top pip £ 1,400 pair.

MH4 Catkin metal Marconi Osram external anode audio output valve

Marconi Osram MOV catkin MH4 £ 150 pair.

MH4 Marconi clear glass balloon shape mesh plate cup getter Holy Grail equiv. 354V AC/HL

MH4 Marconi balloon mesh plate £ 400 pair.

MH4 Marconi balloon mesh plate £ 750 quartet.

MH4 Marconi metalised balloon mesh plate cup getter early 1930s 354V AC/HL equivalent

MH4 Marconi grey metalised £ 400 pair.

MH4 Marconi grey metalised £ 750 quartet.

MH4 Marconi Osram ST shape metalised mesh plate – MH4 Marconi Osram balloon vertical anode rare mesh plate 354V AC/HL

MH4 ST shape Marconi £ 100 pair.

MH4 Marconi balloon mesh plate £ 250 pair.

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.

ML4 Marconi balloon mesh plate rare equivalent AC/P CV1179 NR57

ML4 Marconi Osram balloon £ 380 pair.

ML4 Marconi Osram balloon £ 700 quartet.

MT5B Marconi – NR14 Marconi Navy Admiralty Receiving valve – NT10 Marconi Navy Transmitting valves

Marconi MT5B triode dated 1919 GBP 220.

Marconi NR14: Admiralty valves GBP 180 pair.

Marconi NT10 Navy Transmitting GBP 150.