6B4G - The Resurrection Shuffle

[Nick]

Possible small cap to adjust choke input supply output will be high quality Mundorf silver/gold oil:

Why?

Don't you believe the regulators will work?

Maybe snubbers on the secondary would be worth thinking about in that area.

[Cressy Snr]

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.

[Nick]

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.

[pre65]

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.

[Cressy Snr]

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.

[Cressy Snr]

Now then,
Adjustable negative grid bias rather than cathode bias with SETs.

What's the view?

[jack]

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...

[Nick]

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?

[Nick]

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?

[jack]

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!

See: http://www.audio-talk.co.uk/phpBB3/view ... 76#p141173

[pre65]

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)

[Nick]

No takers? They would be perfect here... I would love one please!

See: http://www.audio-talk.co.uk/phpBB3/view ... 76#p141173

I think I have a couple left, if you want one Jack let me know where you want it sending.

[Nick]

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.

[Cressy Snr]

Remember those Quasimodo boards I was trying to give away?

Er...no
My memory is not as good as it was.
What were them then?

[Nick]

Remember those Quasimodo boards I was trying to give away?

Er...no
My memory is not as good as it was.
What were them then?

Jack already provided a link to the thread.