Octave V 80 SE User Manual

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8. TUBES
8.1. Removing the grille
See Chapter 3.2.
8.2. Tube layout
Output tubes: V1 - V4: KT150 standard
V1 + V2 left channel
V3 + V4 right channel
Driver tubes: V5 +V7 ECC82 (12 AU 7) = power amplifier driver tubes
V 5 is for the right channel
V 7 is for the left channel
V6 ECC81 (12 AT 7, 6072) = input tube
V6 is used in both channels
The pentode output stage topology of the V 80 SE makes it possible to use a variety of output
tubes. Because the specification limits of the tubes are never exceeded in pentode mode, weaker
output tubes may also be considered. This is facilitated by the option of setting the bias current to
two different values: low and high.
Output tubes can roughly divided into three classes – classic pentode output tubes for low and
medium power amplifiers and modern, high performance pentodes for power amplifiers up to 150
W output.
Low Power tubes include: 6L6, KT 66, EL 34, KT 77, 5881, 6 CA 7. Medium Power tubes include:
6550, KT 88, KT 90, KT 100. High Power tubes include: KT 120 and KT 150
Use Medium Power Tubes in the Position of the Power Selector LOW
Use High Power Tubes in the Position of the Power Selector HIGH
Note: Low Power tubes will not allow you to achieve the maximum output of the V 80 SE. We do
not recommend using them in the V 80 SE
Some tubes will fit into the sockets but will still not work with the V 80 SE – the EL 509 / 519, for
example.

Octave V 80 SE Specifications

General

Brand	Octave
Model	V 80 SE
Category	Amplifier
Language	English