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MotorBikeLes · 11th Feb 2018, 9:30 pm

I have reconditioned dozens of the TQ valve scopes with the long selenium HV rectifiers. I have NEVER had a smelly failure. However I did find the output voltage reduced, presumably due to age and use. I made up a simple tester using a neon relaxation oscillator with which I just counted the flash rate. A bit slow and replace, but as said, never a failure.
I have repaired quite a few TV sets with selenium multipliers, and whilst very aware others have had smelly failures, again I was lucky and never had one.
Les.

11th Feb 2018, 9:30 pm	#18
MotorBikeLes Nonode Join Date: Dec 2012 Location: Kirk Michael, Isle of Man Posts: 2,350	Re: Oscilloscope not used in years I have reconditioned dozens of the TQ valve scopes with the long selenium HV rectifiers. I have NEVER had a smelly failure. However I did find the output voltage reduced, presumably due to age and use. I made up a simple tester using a neon relaxation oscillator with which I just counted the flash rate. A bit slow and replace, but as said, never a failure. I have repaired quite a few TV sets with selenium multipliers, and whilst very aware others have had smelly failures, again I was lucky and never had one. Les.