VTL Stereo 50

Thanks. I did some further seach on the web, and it seem,
that many come with 5881 (not 5881WXT). There ara slight
differencer between these tubes and between the EL34 as
well. However, as I know, they can be operated in an
overlapping range. I suspect, that the STEREO 50 needs
some fine tuning to operate correctly with a non exact
replacement tube. This week I will meet with a fellow, who
were involved in tube amp design for 10 years. Perhaps
afte that things will be clear.
Anyway, does anybodey know what's the difference between
the 50 50 and the STEREO 50?

Balazs

I have to guess that the Stereo 50 is left and right channels in a single unit, whereas the 50/50 is a pair of monophonic units, each driving its own speaker.

Yes I guessed it to until I saw an ad saing: Stereo 50 50
for sale. So I'm a bit confused by the vtl model numbering.
Anyway the my need for the service manual is getting
urgent. I want to bring it back to it's original condition.
Any help will be wellcomed.
Balazs

I also have a stereo 50 but dont know what kind of fuse it has

Does anyone have an owners manual? I'm getting one of these amps 5881 output tubes,,any information,such as bias values,experience would be appreciated. Thanks--george