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Though they have similar voltage ratings, seems that the further you go down in dissipation, the quicker they will flashover and kill the tubes, even with less drive and power out.

do a mod an upgrade to 2057 tubes its like a 8950 on steroids . its not to expense to upgrade .

Do you have any examples of mod upgrade?

Unplug the 8950 and plug in the more expensive M2057.
The only advantage that the M2057 has over the 8950 is 7 more watts of plate dissipation .
That is about it.
The G.E. 6LB6 is 30 Watts Plate dissipation ( 6 volt heaters)
The G.E. 8950 is 33 Watts Plate dissipation ( 12 volt heaters )
The M2057 is 40 Watts Plate dissipation ( 12 volt heaters)
The Maco Brand M2057 was made by G.E., they also sold many under the G.E. brand...... some of them are about 1/4 of an inch taller than the 8950...depending on the run of the tubes.
I have seen M2057`s go for anywhere from $80 to $100 a tube.
You can find the 8950 for half that depending on were you look.

http://tubedata.milbert.com/sheets/084/m/M2057.pdf

http://scottbecker.net/tube/sheets/084/8/8950.pdf




73
Jeff

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NASA/SOHO


there is no dark side in the moon, really. As a matter of fact it's all dark

I know it's an old thread but initially the poster stated he wanted to swap-out the 8950 with a 6lf6 and change the pin configuration but the replies were in regards to the 6lb6 tube and made no mention of the 6lf6 tube he wanted to use because he already had some that were good. Perhaps the 6lf6 and 6lb6 is the same tube, I just couldn't make any sense out of the tread because no-one addressed his question as stated. Just sayin