12B4 Equivalents?

Valverine · 23rd February 2007, 07:21 PM

Are there any 12B4(A) equivalents or close substitutes among the European tubes? Looked at the usual on-line references but none are listed... Hard to believe that this is a unique design

Thanks!

Zibi · 23rd February 2007, 10:01 PM

6s19p ?

Valverine · 23rd February 2007, 10:33 PM

Really? At the first glance there seem to be more differences than similarities

diesel_tech · 23rd February 2007, 10:35 PM

how bout a 6877

EC8010 · 23rd February 2007, 10:52 PM

In the US, triodes (such as 12B4) were used for TV vertical deflection. In Europe, pentodes were the norm for TV vertical deflection, hence no European equivalent.

tube-lover · 24th February 2007, 12:22 AM

hi Valverine,

do U use it for driver tube?? is the 6S4 suitable?

thx

thomas

Zibi · 24th February 2007, 05:43 AM

Tube-lover is right. Tell us what are you looking for. A direct replacement or just single triode for particular purposes.

Valverine · 24th February 2007, 05:35 PM

Thanks for the replies!

I'm contemplating using 12B4 in the output position of an Aikido pre. Required params are low internal resistance and good anode current - in this respect 6S19P and other small regulators will fit, as well as 5687, 6N6P, 6N30P.

Based on the prev. discussions here it seems that some 12B4 incarnations might be somewhat problematic, hence the desire to expand the base for the selection.

23rd February 2007, 07:21 PM	#1
Valverine diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	12B4 Equivalents? Are there any 12B4(A) equivalents or close substitutes among the European tubes? Looked at the usual on-line references but none are listed... Hard to believe that this is a unique design Thanks!

23rd February 2007, 10:52 PM	#5
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	In the US, triodes (such as 12B4) were used for TV vertical deflection. In Europe, pentodes were the norm for TV vertical deflection, hence no European equivalent. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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23rd February 2007, 10:01 PM	#2
Zibi diyAudio Member Join Date: Jan 2006 Location: Bialystok	6s19p ?

23rd February 2007, 10:33 PM	#3
Valverine diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Really? At the first glance there seem to be more differences than similarities

23rd February 2007, 10:35 PM	#4
diesel_tech diyAudio Member Join Date: Dec 2006 Location: Sterling, CO	how bout a 6877

24th February 2007, 12:22 AM	#6
tube-lover diyAudio Member Join Date: Jul 2004 Location: Hong Kong	hi Valverine, do U use it for driver tube?? is the 6S4 suitable? thx thomas

24th February 2007, 05:43 AM	#7
Zibi diyAudio Member Join Date: Jan 2006 Location: Bialystok	Tube-lover is right. Tell us what are you looking for. A direct replacement or just single triode for particular purposes.

24th February 2007, 05:35 PM	#8
Valverine diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Thanks for the replies! I'm contemplating using 12B4 in the output position of an Aikido pre. Required params are low internal resistance and good anode current - in this respect 6S19P and other small regulators will fit, as well as 5687, 6N6P, 6N30P. Based on the prev. discussions here it seems that some 12B4 incarnations might be somewhat problematic, hence the desire to expand the base for the selection.

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