Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Smash => Topic started by: airdronian on April 26, 2014, 11:00:49 AM
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I'm not familiar with the 4P1L, and a quick search didn't seem to uncover many sources.
Were these strictly a Russian manufactured tube ?
Roughly how many hours of service could one expect out of these, implemented as they are in the Smash ?
Any info on these tubes would be appreciated.
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I used them in an old tube amp to replace a pair of Chinese 4P1S tubes, i'm not aware of any other equivalents other than the Russian 4P1L. Russian versions were the better of the two.
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Were these strictly a Russian manufactured tube ?
Roughly how many hours of service could one expect out of these, implemented as they are in the Smash ?
Any info on these tubes would be appreciated.
There may be an old Telefunken tube that served as the basis for the 4P1L, but I'm not finding a reference to that in a quick search.
I don't know how many hours you could get out of one. It might take several years of constant use to wear out a pair of tubes, and in that instance you wouldn't have the wear and tear from power cycling, so the number wouldn't be that helpful.
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Makes me wonder if there are other tubes that could be used with a simple pin-out change and maybe a resistor like the FPIII... 6SN7, etc...?
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Sure, there are a crap ton of tubes that could be built into the chassis to function as a preamp.
The tough part is that few of them will be directly heated with adequate beef to function as a preamp tube without an output transformer, and of those that are that beefy, the filament requirements may be unreasonable.