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Some Toroid Transformer Questions!!!!
- Thread starter laatsch55
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Re: Some Toroid Transfoprmer Questions!!!!
Lee
I recommend you get the right working voltage caps when using electrolytics. Electrolytics that large in value often do not share well due to leakage in one cap being larger than the other. Measure each end to the intermediate bus bar voltage to ensure that they are close in your present setup.
Lee
I recommend you get the right working voltage caps when using electrolytics. Electrolytics that large in value often do not share well due to leakage in one cap being larger than the other. Measure each end to the intermediate bus bar voltage to ensure that they are close in your present setup.
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Re: Some Toroid Transfoprmer Questions!!!!
That setup was only being used to check rectified and filtered final rail voltage. They were on for about ten minutes is all. Apex Jr has some 35,000 @ 120 volters , so I'll be getting some of those.
On a side note, was working on another local 400, had a fried BR(positive diode) and a shorted positive power supply cap. It's the first PS cap I've run accross that was actually shorted. What do ya suppose the failure mode was,. BR first, cap second??
That setup was only being used to check rectified and filtered final rail voltage. They were on for about ten minutes is all. Apex Jr has some 35,000 @ 120 volters , so I'll be getting some of those.
On a side note, was working on another local 400, had a fried BR(positive diode) and a shorted positive power supply cap. It's the first PS cap I've run accross that was actually shorted. What do ya suppose the failure mode was,. BR first, cap second??
Re: Some Toroid Transfoprmer Questions!!!!
Cap first Lee would be my guess. If the bridge went first and put AC on the cap, it would have vented. The fact that the cap is shorted and not vented provides the evidence that it failed first.
Phase always ran these caps too close to (or over) the limits. Derating actually works
Cap first Lee would be my guess. If the bridge went first and put AC on the cap, it would have vented. The fact that the cap is shorted and not vented provides the evidence that it failed first.
Phase always ran these caps too close to (or over) the limits. Derating actually works
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Re: Some Toroid Transfoprmer Questions!!!!
What does drop like a rock mean Lee? Are you driving this with your signal generator when this happens?
Or does this mean that with no signal input you attach an 8 ohm load to the output and the bias drops? If it is the latter then I suppose I would look at Q10 or Q11 as having low or no gain.
What does drop like a rock mean Lee? Are you driving this with your signal generator when this happens?
Or does this mean that with no signal input you attach an 8 ohm load to the output and the bias drops? If it is the latter then I suppose I would look at Q10 or Q11 as having low or no gain.
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- Joined
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