P Paul Joppa Moderator Jul 25, 2020 #2 You would need four of them, and the sockets are octal, so it would not fit on the stock chassis plate, but it would work in the circuit. It needs twice the heater current, so a new power transformer would also be needed. It's half of a 6SN7.
You would need four of them, and the sockets are octal, so it would not fit on the stock chassis plate, but it would work in the circuit. It needs twice the heater current, so a new power transformer would also be needed. It's half of a 6SN7.