Definitive Build

[Daniel Quinn]

I used 2 bridge rectifiers for a phono amp power supply . The power amps pre date this .

I’ve learnt all I know by copying nva amps hence my limited knowledge and the reason I cocked up the second power supply with 2 bridges.

I’m at the stage in understanding there is more than 1 way to wire the transformers , bridges and caps but I haven’t a clue of the relative merits of each method.

So what do I read?

And nick I note what you say but come on I should get some credit for doing it left handed

[Nick]

Yep, you get some credit, but there is always room for improvement

As to a link that talks about the ways and means. Not sure, there are lots of books I could suggest but they all assume some knowledge. The Elliott Sound Products pages are good places to start.

https://sound-au.com/power-supplies.htm

[Paul Barker]

I used 2 bridge rectifiers for a phono amp power supply . The power amps pre date this .

I’ve learnt all I know by copying nva amps hence my limited knowledge and the reason I cocked up the second power supply with 2 bridges.

I’m at the stage in understanding there is more than 1 way to wire the transformers , bridges and caps but I haven’t a clue of the relative merits of each method.

So what do I read?

And nick I note what you say but come on I should get some credit for doing it left handed

Nick is very straight talking but youd be a fool to not listen to what he says.

[Daniel Quinn]

Thanks nick .

[Nick]

Hey I am happy either way. No skin off my back

[Daniel Quinn]

When I was practising law if a client ignored my advise I would think there were a cretin and loved the schadenfraud when what I advised came to fruition.

I don’t mind people knowing more than me about electronics I’m grateful people are happy to share thier expertise

[Daniel Quinn]

Large caps are expensive .

Is there a theoretical difference between 4 33,000 if cap and 12 10,000uf caps?

Deos anybody have experience of both and prefer one ?

[Nick]

Depends on the caps on question. Compare the Dcr and inductance and the ripple current capacity.

[ed]

Large caps are expensive .

If you know what you want I can suggest that you check the surplus suppliers...there are real bargains to be had if you don't pay any attention to the boutique peddlars.

[pre65]

Depends on the caps on question. Compare the Dcr and inductance and the ripple current capacity.

Dennis, I still have a few of those soup tin size capacitors in my stash, depending on what size uf and voltage you need.

I got most of mine as Ed 's last post.

[Daniel Quinn]

I’ll have a look.

For the moment I’m working out theory. Build will be in may onwards.

So assuming they have the same measurements there be no difference in large or small caps .

[Daniel Quinn]

Right . I’m going to play about . Got some naim clone boards that need 40v .

Got a 500va transformer with 30v secondaries.and 4 33,000uf capacitors. A per mono amp .

To run separate bridges , I use a bridge for the v+ and a bridge for the v- . Do I run the capacitors as two separate runs ? That will be black red and 2 caps and yellow orange and the other two caps. No connections between the caps for + and ~

With naims 2 earths to the board is it okay to run one to each rail power supply?

[Nick]

Sorry, I don't understand what you are saying, and if I did, I may not have the same understand as you do. I know you don't like them and they seem problematic, but a drawing is needed,

[pre65]

Dennis, doing a diagram before you start is good practice.

I always do diagrams to help me understand my thoughts, and I keep a folder for each project so I can refer to things when repairs, or upgrading is necessary.

[Ray P]

Right . I’m going to play about . Got some naim clone boards that need 40v .

So you need a +/-40VDC power supply?

Is this schematic something like what you have in mind?