positron wrote on Tue, 02 July 2024 23:41

I am wondering what the idle plate dissipation is with the Audio Note kit 2?

Sorry for the super-late reply on this thread.  Too much keeping me busy these days.  But I did make a note to remove the bottom panel and check this when I could.  Finally got around to doing that today:

Right channel
Cathode resistor:   281Ω
Voltage across it:  19.50v
Current:            69.4mA

Left channel
Cathode resistor:   278Ω
Voltage across it:  18.95v
Current:            68.2mA

I didn't measure the plate voltage, which would have been needed to calculate plate dissipation.  To be honest, I was more interested in plate current.

It's almost exactly at the midpoint of what I consider to be maximum in this amplifier;  I think the maximum safe current flow is 125mA, and that's the value of fuse I installed in series with the cathode.