• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Vademecum nomenclature

Someone kindly sent me a copy of a page from the Vademecum (the European tube 'Bible'?) on a specific tube I'm interested in. For tube equivalents it listed equivalents as Slm = Tube and/or SFR = Tube
Could someone with more familiarity with this book tell me the meanings of these abbreviations?

Thanks in advance


diyAudio Senior Member
2002-08-21 1:20 am

I don't have the book handy here but from what I recall it meant
SIM = simular meaning electrical equivalent.
SFR = simular but with different internal pinout.
Check with what the other guys have to say but I'm sure it was something like that.
Hang on to that book though,it's a gem.


Sincere thanks. I just got back into town (returning my overindulged son to University) and saw your response. Unfortuneately, I don't have the Vanemucum, but rather, I was sent a copy of one page. From its context, I'd assumed those were the meanings, but purposely left my suspicions out so not to prejudice any response.

Many thanks,