18-02-2021, 01:20 PM
X78 seem to be an odd Marconiphone valve with no direct equivalent, triode hexode B7G base.
Any suggestions? I have a spare but would like to have another source of a usable equivalent even if it means a base change.
Sam.
Any suggestions? I have a spare but would like to have another source of a usable equivalent even if it means a base change.
Sam.
Boater Sam.