Dual mono or separate transformers for input- and outputstage?

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Colin Wonfor
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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Colin Wonfor »

Just a rough guide, Dan and how are you??
It can be done so imagine it.

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Re: Dual mono or separate transformers for input- and outputstage?

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Considering my left basal ganglia has been rendered significantly faulty by an inclusion of blood, im doing dam fine.

Nice to hear from you and good to see your passing your knowledge on in such a helpfull way.
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karatestu (Fri Jul 31, 2020 7:35 pm) • Colin Wonfor (Sat Aug 01, 2020 1:40 pm)

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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Geoff.R.G »

Thank you Colin, some formulae that I had forgotten.
Irrelevant here, but the other number I find/found useful was 1.73

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Colin Wonfor
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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Colin Wonfor »

I like the square root of 2 = 1.414 a practical joke from the great designer in the sky , also when I got my Radio Ham Licence he did it again G8XIV, and again when I worked at Plessey my Stamp number on paper work was PL144.
So I started a company and sold it and the patents called yep you guessed it Root2.
https://www.root2.ltd.uk/

Great joker is the designer in the sky.

Kind regards

Colin J. Wonfor (14)
It can be done so imagine it.

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Colin Wonfor
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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Colin Wonfor »

Geoff.R.G wrote:
Fri Jul 31, 2020 9:37 pm
Thank you Colin, some formulae that I had forgotten.
Irrelevant here, but the other number I find/found useful was 1.73
Did you also do:-
Ergs, Dynes, Radiums, Columbs, Theta Curves, Phyton Distortions, Torsion Fields., Tesla, Maxwell, and Coffee by Douwe Egbert.
Late nights study where a killer after a day at work in the Chemy Lab.
Was it 27.3Deg = 1Rad ? A long time since I used them will start studies again. :-?
It can be done so imagine it.

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Colin Wonfor
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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Colin Wonfor »

It can be done so imagine it.

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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Geoff.R.G »

Colin Wonfor wrote:
Sat Aug 01, 2020 1:40 pm
Geoff.R.G wrote:
Fri Jul 31, 2020 9:37 pm
Thank you Colin, some formulae that I had forgotten.
Irrelevant here, but the other number I find/found useful was 1.73
Did you also do:-
Ergs, Dynes, Radiums, Columbs, Theta Curves, Phyton Distortions, Torsion Fields., Tesla, Maxwell, and Coffee by Douwe Egbert.
Late nights study where a killer after a day at work in the Chemy Lab.
Was it 27.3Deg = 1Rad ? A long time since I used them will start studies again. :-?
Some of that, going from college to a night shift wasn't much fun either. When people ask questions about what I say I often have to go and do some research because I have forgotten much more than I remember. I only learned about QAM in the last 20 years but I really can't remember much of the detail, probably because I went from IFE to Electronic logbooks and stopped using it. I can tell you more about ring laser gyros than I can about power supplies and audio amplifiers were back in the 1970s. The last time I used much theory was in relation to a cross channel interference problem on a 747-100, I concluded that the earth wire from the selector panel to the audio accessory box had a high resistance.

Driving a live sound desk once a week isn't exactly guaranteed to keep the brain active on the theory side.
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Colin Wonfor (Sat Aug 01, 2020 4:28 pm)

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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Geoff.R.G »

Colin Wonfor wrote:
Sat Aug 01, 2020 1:31 pm
I like the square root of 2 = 1.414 a practical joke from the great designer in the sky , also when I got my Radio Ham Licence he did it again G8XIV, and again when I worked at Plessey my Stamp number on paper work was PL144.
So I started a company and sold it and the patents called yep you guessed it Root2.
https://www.root2.ltd.uk/

Great joker is the designer in the sky.

Kind regards

Colin J. Wonfor (14)
Root 2 is used a lot in photography, aperture stems are based around 1.414 f1.4, 2, 2.8, 4, 5.6 etc.
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Colin Wonfor (Sat Aug 01, 2020 4:27 pm)

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Re: Dual mono or separate transformers for input- and outputstage?

Unread post by Lurcher300b »

1 simple rule of thumb for 50Hz , 1A on 10,000uf has 1V ripple. So now if the cap is charged to 10V (easy numbers) the ripple at 1A only give us a useful voltage of 9V with out clipping and 100Hz ripple noise. Now if we make a stereo 6.3W/ch what is the current it need from the 10V supply running a 4ohm load, about 3 amps, whoop we now have a 3V ripple and useful voltage of 7W, oh dear it is now not 6.w/ch.
The above is simplified ,
But we were talking about a phono stage that basically 4 op amps.

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