UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Building a little practical audio amplifier for experimentation

Silicon · 8th Mar 2019, 9:08 pm

Miguel, it may be a good idea to add a 600V series capacitor to the input.

It will prevent DC voltages from the signal source altering the bias on the input valve.
It will also provide some protection and isolation.

What is the function of R11?

8th Mar 2019, 9:08 pm	#4
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,171	Re: Building a little practical audio amplifier for experimentation Miguel, it may be a good idea to add a 600V series capacitor to the input. It will prevent DC voltages from the signal source altering the bias on the input valve. It will also provide some protection and isolation. What is the function of R11?