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Audio Output Triodes

DA30 GEC audio output valves DO30 NR56, ribbed plate black and brown base for stereo sound

DA30 GEC £ 550 pair

DA30 Osram balloon shape DO30 NR56 POVT111 V503 matched quartet audio output triodes

Osram DA30 balloon audio triodes £ 1,800 quartet

DA60 Marconi Osram tubular CV1206 equivalent DA60 pair power triode L4 base Top Pip Holy Grail

DA60 Marconi Osram GBP 3,000 pair.

DET1 Marconi dull emitter first valve with flat nickel plate Top Pip Holy Grail

DET1 Marconi Top Pip GBP 5,500 pair.

DET1 Marconi first dull emitter thoriated tungsten valves with flat nickel plate

DET1 Marconi GBP 2,500 pair.

DO20 Mullard balloon PIP TOP very rare audio output triode chrome plate oxide filament tested 100% boxed

Mullard DO20 pip tip tested 100% £ 400

DO20 Mullard balloon very rare audio output triodes carbon plate oxide filament tested 100% pair

Mullard DO20 balloon year 1929 £ 900 pair

DO24 Mullard balloon output triode PX25 PP5/400 equivalent best ever made valves pair

Mullard balloon DO24 £ 1500 pair

DO24 Mullard early type Pip Top NOS original boxes pair output triodes carbon plate PX25 PP5/400 equivalent

Mullard DO24 balloon Pip Top Boxed £ 2,000 pair