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Old 1st Jan 2014, 11:27 am   #6
Phil G4SPZ
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Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,376
Default Re: Rejuvenating Magic eye Valves?

I've read a couple of articles which suggest that the only way of getting more life out of tired eyes is to increase the target voltage, up to 500 volts. There is an article in the latest NZVR Bulletin with a suitable voltage doubler design. Coupled with reducing the heater voltage by 20% or so, a greatly extended life is claimed for both old and NOS eyes.
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