UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Bob Howe wants to know. What was the worst CRT TV to work on and why?

kevinaston1 · 29th Jul 2021, 10:08 pm

I left the trade around the time of the G11, and went into my true love, the music industry.

One amplifier module from a "respected" German company constantly appeared on my bench, a simple 100W jobbie. Problem was, it would blow its output devices an any day with a Y in it.

Despite complaining to them about the poor life expectancy, I received no feedback from them. I spent some time analysing the circuit, and found the "lop sided" short circuit protection made it oscillate wildly when driving a low impedance load.

I sent them a large folder showing my findings, and my modification which made the amplifier stable.

The answer I received just about says it all.

"That is how it was designed"

29th Jul 2021, 10:08 pm	#95
kevinaston1 Hexode Join Date: Aug 2014 Location: Featherstone, West Yorkshire, UK. Posts: 386	Re: What was the worst CRT TV to work on and why? I left the trade around the time of the G11, and went into my true love, the music industry. One amplifier module from a "respected" German company constantly appeared on my bench, a simple 100W jobbie. Problem was, it would blow its output devices an any day with a Y in it. Despite complaining to them about the poor life expectancy, I received no feedback from them. I spent some time analysing the circuit, and found the "lop sided" short circuit protection made it oscillate wildly when driving a low impedance load. I sent them a large folder showing my findings, and my modification which made the amplifier stable. The answer I received just about says it all. "That is how it was designed"