Quote:
Originally Posted by TrllVl90
I checked the filament voltage and got 2.2 (or 1.5 if I used the low-impedance setting). Both seem wildly incorrect. Would the retrace-cap value being low also drop the voktage? I know I got some cheap ones, but I'm not certain what the effects of high capacitance vs low capacitance are in the circuit.
Also I'm assuming I measured correctly. I measured across the two filament joints (in my case pins 9 &10).
Thanks in advance.
Edit: I also tested the voltage within a couple minutes of turning it on rather than waiting until the image became clearer. If that matters.
|
I don't think the tube would even light at 2.2V. The meter is on "AC" (~), correct?
Have you verified the meter? Try it on your wall plug to see if you are getting about 120VAC.
If the retrace cap is low in value, the HV and filament would be high.
I don't recall the pin numbers of the filaments, but they should read very low ohms (power off) across the filament pins (couple of ohms) if you are on the right pins.
Since sweep is regulated, the voltage will be the same hot or cold.
John