EL152, GU50 and EL156

[commstech]

can i get away with ac heating for the EL156 filament on more sensitive speakers eg. 96db ?

 

[tubesteve]

heaters

if you do it properly, yes

 

[el156]

el156

Hi, I am thinking of building an amp using EL152, GU50 or EL156. Anyone have experience with the tubes that can share their experiences and thoughts? Sound, operating points, etc?

HI ! I ALSO HAVE 5 BRAND NEW EL156, AND WOULD LIKE TO MAKE A SE 25W WITH! BUT MY PROBLEM IS THE OPTs ,THEY HAVE TO BE 4K FOR THIS CONFIGURATION, WITH B+ 450V AND VERY EXPENSIVE! MAYBE SOMEONE CAN TELL ME WHERE CAN I BUY CHEAPER ONES?
bUT ARE YOUR EL156 FROM TELEFUNKEN?
THANKS