12-06-2021, 06:32 PM
Disconnecting pin 4 on a UL41 is always advisable as some makes of valve have an internal connection to that pin.
Any reduction in the number of connections in the base of said valves is an advantage as it lessens the chance of deposits causing hum.
Any reduction in the number of connections in the base of said valves is an advantage as it lessens the chance of deposits causing hum.
Boater Sam.







