UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - AZ31 as rectifier for a stereo Mullard 3-3?

barrymagrec · 3rd May 2021, 5:20 pm

According to the circuit the cathode resistor for the EL84 is 560R and the cathode voltage given is 28 which suggests a 50mA current draw per channel. The EF86 consumption is negligible but two channels is 100mA which is right on the limit for the valve and if the transformer was running a pair of EL33s and a few small valves it is going to be marginal for 100 mA as well

3rd May 2021, 5:20 pm	#2
barrymagrec Octode Join Date: Dec 2017 Location: Morden, Surrey, UK. Posts: 1,558	Re: AZ31 as rectifier for a stereo Mullard 3-3? According to the circuit the cathode resistor for the EL84 is 560R and the cathode voltage given is 28 which suggests a 50mA current draw per channel. The EF86 consumption is negligible but two channels is 100mA which is right on the limit for the valve and if the transformer was running a pair of EL33s and a few small valves it is going to be marginal for 100 mA as well