"François Yves Le Gal"


The Twin is designed around real 6L6GC's.


** I don't think so.

The Red Knob Twin or "The Twin" ( aka The Evil Twin ) was designed in
1989/90 as a replacement for the 135 watt "ultra-linear" Twin Reverb which
had been designed around the Sylvania/Philips ECG 6L6GC tube - really the
same up-rated tube as the 7027.

By 1989 the Sylvania 6L6GC / 7027 tubes were no longer in production, nor
were similar tubes from GE. Hence - the Red Knob Twin was designed DOWN to
take the then available Chinese made 6L6GC tubes, most of which were of
truly awful quality.

IME Sovtek brand and other Russian made 5881s work very well in the Red
Knob Twin - but not so good in the 135 watt "Twin Reverb" models.


I understand 5881 cannot take the same plate voltage.


** Plate voltage is not the problem issue.

Plate dissipation, peak plate current and excessive screen supply voltage
are.



........ Phil