I was just talking about the usual small cap after the rectifier, just to tweak the HT a bit. Probably won't need it.
Secondary snubbers are something I've never thought of but it makes perfect sense.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Yep, I new what you meant, the cap that stops it being choke input, but does allow you to tweek the voltage. It was the "high quality Mundorf silver/gold oil". I would have just used a cap.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
Nick wrote: ↑Tue Aug 22, 2017 11:07 am
Yep, I new what you meant, the cap that stops it being choke input, but does allow you to tweek the voltage. It was the "high quality Mundorf silver/gold oil". I would have just used a cap.
I usually use small value motor run caps for that Steve.
The only thing necessary for the triumph of evil is for good men to do nothing.
Aye..
Waste of a good cap
I don't think anything like that will be needed though.
Been looking at the maths required to calculate R and C snubber values for mains TX secondaries and how to measure interwinding capacitance and transformer leakage inductance accurately so that reasonable calculations can be made
I'll need to blow the dust out of the scope and sig gen then.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
Cressy Snr wrote: ↑Tue Aug 22, 2017 12:52 pm
Been looking at the maths required to calculate R and C snubber values for mains TX secondaries and how to measure interwinding capacitance and transformer leakage inductance accurately so that reasonable calculations can be made
I'll need to blow the dust out of the scope and sig gen then.
If you haven't got it already, I can scan the articles from Linear Audio which relate to this - very easy reading - one by MJ and another by a bloke whose name I've forgotten !
Nick wrote: ↑Tue Aug 22, 2017 11:07 am
Yep, I new what you meant, the cap that stops it being choke input, but does allow you to tweek the voltage. It was the "high quality Mundorf silver/gold oil". I would have just used a cap.
I usually use small value motor run caps for that Steve.
Why bother with choke input if you are then going to make it cap input, why not just use cap input?
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
Cressy Snr wrote: ↑Tue Aug 22, 2017 12:52 pm
Been looking at the maths required to calculate R and C snubber values for mains TX secondaries and how to measure interwinding capacitance and transformer leakage inductance accurately so that reasonable calculations can be made
I'll need to blow the dust out of the scope and sig gen then.
If you haven't got it already, I can scan the articles from Linear Audio which relate to this - very easy reading - one by MJ and another by a bloke whose name I've forgotten !
Simple recommendations in there...
Remember those Quasimodo boards I was trying to give away?
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
Cressy Snr wrote: ↑Tue Aug 22, 2017 12:52 pm
Been looking at the maths required to calculate R and C snubber values for mains TX secondaries and how to measure interwinding capacitance and transformer leakage inductance accurately so that reasonable calculations can be made
I'll need to blow the dust out of the scope and sig gen then.
If you haven't got it already, I can scan the articles from Linear Audio which relate to this - very easy reading - one by MJ and another by a bloke whose name I've forgotten !
Simple recommendations in there...
Remember those Quasimodo boards I was trying to give away?
No takers? They would be perfect here... I would love one please!
Nick wrote: ↑Tue Aug 22, 2017 11:07 am
Yep, I new what you meant, the cap that stops it being choke input, but does allow you to tweek the voltage. It was the "high quality Mundorf silver/gold oil". I would have just used a cap.
I usually use small value motor run caps for that Steve.
Why bother with choke input if you are then going to make it cap input, why not just use cap input?
I was under the impression that choke input, but with a small capacitor (say 1-2uf) to raise the voltage, was more choke input than cap input.(if you understand what I mean)
The only thing necessary for the triumph of evil is for good men to do nothing.
pre65 wrote: ↑Tue Aug 22, 2017 1:41 pm
I was under the impression that choke input, but with a small capacitor (say 1-2uf) to raise the voltage, was more choke input than cap input.(if you understand what I mean)
I understand what you mean, but I dont think it makes that much sense. I guess it depends on your definition of Choke Input. To me it means that current flows constantly. Adding the cap means that it doesn't. To my understanding adding the small cap just makes it bad cap input, not partial choke input.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.