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Audio Output Triodes

2P 4XP AC044 CV1040 DA30 DA100 DET1 DET5 DO24 DO25 DO3O DO60 NR47 P27/500 PP3/250 PP5/400 PX4 PX25 VR40

2P Cossor AC042 PA20 directly heated audio output triodes carbon anode quartet

Cossor 2P black plate £ 600 quartet

2P Cossor tall glass engraved top lettering quartet audio triode PA20 AC042 equivalent

2P Cossor tall glass £ 600 quartet

3B/600Z STC DO60 DA60 Standard Telephones and Cables Ltd. 60 Watts directly heated triode L4 base

STC type 3B/600Z directly heated triode L4 base GBP 400.

4212H STC ITT Western Electric 212 V1505 audio output triode Top Pip CV1252 CV1619 NT92

ITT STC W.E. 4212H GBP 5,500 pair.

4XP Cossor audio output triodes PX4 PP3/250 equivalent long cone semi-coated full getter quartet

Matched Cossor 4XP £ 1,000 quartet.

4XP Cossor PX4 BVA type Z8216 made in England pair audio triodes tested 100% AC044 PP3/250 equivalent

4XP Cossor white print on glass £ 600 pair

660T Cossor Top Pip Power Valve balloon shape audio amplifier

Cossor 660T Balloon top pip GBP 1,200.

AC042 Mullard 2P PA20 gold top long semi coated envelope ribbed plate full getter pair audio valves

Mullard AC042 semi-coated £ 300 pair

AC042 Mullard old logo 2P PA20 pair output triode early type tested pair tubes valves

Mullard AC042 £ 250 pair