s it possible to swap 12ax7's for el84's i heard they use the same socket.
will i need to rebias? and how does this affect the sound?




(originally posted to old forum at an earlier date)

It is not possible to swap these tubes directly as the sockets must be rewired. The 12AX7 is a dual triode preamp tube. It has two separate amplification sections that can be used independently of each other and cannot handle any power.

The EL64 is a Power penthode meant to operate in the power stage of the amp. It has a single amplification section and can handle much greater current and power than a 12AX7.

Normally these tubes are never interchanged since they operate in different srtages of the amp and serve different purposes.




(originally posted to old forum at an earlier date)