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Audio output pentodes valves with octal base

A Pentode is an electronic valve with five electrodes. It is widely referred to as a three-grid amplifying valve. The additional grid is called the suppressor grid, and its role is to give a greater output signal; this is achieved from the plate of the Pentode when it is in operation;

Power pentodes are designed to operate at higher currents, higher temperatures and higher voltages than ordinary pentodes. A Pentodes has octal base.

The most common power pentode are KT61 KT66 EL33 EL34 EL35 EL37 EL38 EL84 KT77 6L6G 350B 6V6G

EL33 EL34 6CA7 EL35 EL37 EL84 6BQ5 N709 etc

EL33 Mullard PENTONE code 1007 with Square Getter and Carbon plate KT61 equivalent suit Leak TL10

Mullard EL33 Square Getter £ 200 quartet

EL33 Mullard PENTONE Full thick getter 1007 etched on glass KT61 equiv. suit Leak TL10 Radios

Matched quartet Mullard EL33 thick getter £ 250

EL33 Mullard PENTONE KT61 6P25 old logo early type black plate full getter suit Leak TL10 and Radios

Matched quartet Mullard PENTONE £ 250

EL33 Mullard red paint BVA 266 mesh plate full getter KT61 equiv. suit Leak TL10

Mullard PENTONE RED paint mesh Anode £ 350 quartet

EL33 Mullard RED Paint on base tall glass mesh and black plate equivalent KT61

Mullard EL33 tall glass £ 140 pair, Mullard and Pinnacle EL33 £ 100 pair

EL33 Rare Mullard Mesh plate BVA 10E/596 Full Getter KT61 equivalent best valves!

Mullard EL33 Mesh plate £ 500 quartet

EL34 Mullard 6CA7 KT77 Audio Power Valve Double Getter XF2 code on glass Holy Grail

Mullard EL34 Double Getter XF2 £ 750 quartet

EL34 Mullard double getter 6CA7 rare Yellow print old logo KT77 type xf2 B made at Blackburn

Mullard yellow print double getter £ 700 quartet

EL34 Mullard double square getter xf4 welded plate holed spigot KT77 6CA7

Mullard EL34 double square getter £ 450 pair