The Frizzle
Active member
Thank you for your answer pip!
I read a bit about tubes and the heater today and I think I did the heater measurements wrongly (I measured the heater pin against ground).
As far as I understood I'm supposed to measure between pin 3 and pin 4 of the tube since these are the heater pins.
I have 4 tubes, tested all and left the ones with the highest heater voltage in:
Tube 1 Heater: 16,48 V (Between pin 3 and 4)
Tube 2 Heater: 18,45 V (Between pin 3 and 4)
So the Voltage should be ideally 20V right? Is the 16,48 V too low for the tube to start working?
I ordered 10 new tubes here: https://www.tubezone.co.uk/product/6028-408a-philips-ecg-usa-tube/
Hope those are the right ones.
Would it be safe to raise the PSU Voltage to something like 110 volts to push tube 1 into working voltage? If not I'll just wait till the new tubes arrive.
I read a bit about tubes and the heater today and I think I did the heater measurements wrongly (I measured the heater pin against ground).
As far as I understood I'm supposed to measure between pin 3 and pin 4 of the tube since these are the heater pins.
I have 4 tubes, tested all and left the ones with the highest heater voltage in:
Tube 1 Heater: 16,48 V (Between pin 3 and 4)
Tube 2 Heater: 18,45 V (Between pin 3 and 4)
So the Voltage should be ideally 20V right? Is the 16,48 V too low for the tube to start working?
I ordered 10 new tubes here: https://www.tubezone.co.uk/product/6028-408a-philips-ecg-usa-tube/
Hope those are the right ones.
Would it be safe to raise the PSU Voltage to something like 110 volts to push tube 1 into working voltage? If not I'll just wait till the new tubes arrive.