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Old 13th Oct 2019, 1:49 pm   #101
Maarten
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Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,184
Default Re: Philips BX281U20 valve radio

Again about the measuring of heater voltages: that's only a rough indication and not worth spending several posts back and forth on that could have been spent on how to go about measuring the current (using ohms law and the heater series resistor for example). In series heater circuits the only way to determine whether valves are heated in their allowed operating range, is to measure current. Philips very clearly specified so in their data sheets and it makes sense since that's the parameter production is tightly controlled for in these types.

Last edited by Maarten; 13th Oct 2019 at 1:55 pm.
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