21-06-2021, 06:16 AM
(20-06-2021, 07:00 PM)Bushbaby Wrote: ... it has a mustard cap that I installed (replaced. an old black 0.01uF Hunts...ugh!) across the primary (black and brown leads) so I am not sure that I can get accurate resistance readings whilst its still wired in.Hi Rob,
Good as Mullard 'mustard' capacitors are, the one you fitted is only rated at 400V and is not suitable for use in that position.... it needs a capacitor rated at 1000V.
Also, there would be no problem measuring the resistance across the transformer primary with the capacitor in circuit, as capacitors don't pass DC (from your meter) unless they're faulty - and even an old leaky capacitor in that position wouldn't affect the reading much (if at all) because the winding resistance should be significantly less, probably less than 1000 ohms.
Andy
