Voltage regulation
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- Old Hand
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#1 Voltage regulation
I’ve got a myriad of phono boards I’m playing with.
Some need for the voltage stepping down. So I’ve got several voltage regulators for single and split rail boards.
I bought the cheapest of eBay .
Are they all created equal or do they effect sound and what should I be looking out for.
Some need for the voltage stepping down. So I’ve got several voltage regulators for single and split rail boards.
I bought the cheapest of eBay .
Are they all created equal or do they effect sound and what should I be looking out for.
#2 Re: Voltage regulation
you don't say which version you bought, so a bit tricky to answer.
I use this one for testing, can't speak to quality of supply though. You can be sure they're not all created equal though. If you've got a noisy one you can always filter some more. The one shown is long in the tooth but I still think you can find similar for a couple of pounds.
I use this one for testing, can't speak to quality of supply though. You can be sure they're not all created equal though. If you've got a noisy one you can always filter some more. The one shown is long in the tooth but I still think you can find similar for a couple of pounds.
There's nowhere you can be that isn't where you're meant to be
#3 Re: Voltage regulation
But adding filtering will increase the supply impedance so will partly defeat the point of regulating. Arguably shunt regulation is better all things being equal. But if it's just a case of too much voltage consider adding bucking windings to the transformer if you can.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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- Old Hand
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#4 Re: Voltage regulation
I’ve got about 20.
Currently I’m using them to step down the 42 v power to 24v to power a + dual rail.
I remember reading something about bucking windings. More reading .
Thanks gents
Currently I’m using them to step down the 42 v power to 24v to power a + dual rail.
I remember reading something about bucking windings. More reading .
Thanks gents
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- Old Hand
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#5 Re: Voltage regulation
So if I have understood advise in this post and my original one correctly , I would be better of using a transformer which gave me 18v .
18x 1.41 =25.3 volts
This should be fine fine for a board which needs 24v
In this way I would just need a bridge rectifier and caps and thus I wouldn’t increase the inpedance
18x 1.41 =25.3 volts
This should be fine fine for a board which needs 24v
In this way I would just need a bridge rectifier and caps and thus I wouldn’t increase the inpedance
#6 Re: Voltage regulation
That would be where I would start. You could try regulation later, but most of the other suggestions (IMHO) are trying to work out solutions to the problem caused by a initial wrong choice of transformer.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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- Old Hand
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#7 Re: Voltage regulation
On a point of clarification it wasn’t a choice , it what I had lying about. A 500va 30v transformer.
#8 Re: Voltage regulation
Yes, I see your point, but you did chose to use what you had laying about
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
#9 Re: Voltage regulation
You'll also need to factor in the voltage drop across the rectifier diodes and regulator.
And remember there are no free lunches - when you multiply 18V by 1.414 you reduce the DC current capacity - if you need 24VDC @ 1A you would want something like a 36VA transformer (assuming an 18V secondary).
Sorry, I couldn't resist!
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#10 Re: Voltage regulation
Oh, I think it will be a tad bigger than 36VA.
The only thing necessary for the triumph of evil is for good men to do nothing.
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G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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- Old Hand
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#11 Re: Voltage regulation
Indeed.
If it wasn’t for the fact others have tried it , I would begin to think it was all in my mind. But then I remember Richard spent decades selling hifi were the only difference was the size and no of power supplies.
As far as phono amp are concerned my theory revolves around the fact that Richards phono stage are 4 op amps one for each stereo channel .
Which I can’t find in a commercial stage but there is one in diy audio forum with 4
If it wasn’t for the fact others have tried it , I would begin to think it was all in my mind. But then I remember Richard spent decades selling hifi were the only difference was the size and no of power supplies.
As far as phono amp are concerned my theory revolves around the fact that Richards phono stage are 4 op amps one for each stereo channel .
Which I can’t find in a commercial stage but there is one in diy audio forum with 4
#12 Re: Voltage regulation
I do one like that. 4 op amps the PH-1. £200.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
#13 Re: Voltage regulation
I went through that earlier and there is no regulator.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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- Old Hand
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#15 Re: Voltage regulation
It has a different approach to the power supply, and yes, MM only.Daniel Quinn wrote: ↑Sat Dec 11, 2021 9:51 pmI might have known but doesn’t it have a power supply I would find poor and only mm
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.