UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Armstrong 521 voltage selector and fuse blowing issues.

cooperman · 20th Feb 2018, 1:20 am

I've been putting the repaired amplifier through it's paces. Loud -Led Zeppelin, soft - Nina Simone. All fine at first - now starting to get soft popping noises in one channel. Like someone blowing on a microphone. Any ideas?

20th Feb 2018, 1:20 am	#38
cooperman Pentode Join Date: Feb 2018 Location: Cheshire, UK. Posts: 121	Re: Armstrong 521 voltage selector I've been putting the repaired amplifier through it's paces. Loud -Led Zeppelin, soft - Nina Simone. All fine at first - now starting to get soft popping noises in one channel. Like someone blowing on a microphone. Any ideas?