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Old 30th Oct 2019, 10:25 am   #32
Herald1360
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Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,535
Default Re: Westminster S470M power supply problem?

Sounds like there may have been a heater-cathode leak on the UY85. That could cause a modicum of mayhem as the valve heated up!

The unstable voltages could have been dc with a load of unwanted ac superimposed.
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