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Old 19th February 2003, 07:34 PM   #11
JDeV is offline JDeV  South Africa
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Quote:
Originally posted by Electro-Nick
Hi,

I made a bridge just like Peter.
Nick

Would these diodes be good for such a bridge on an Aleph30?

BY229-400
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Old 20th February 2003, 02:44 AM   #12
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Why not?

If they get hot you have to heatsink them.

But in my very personal opinion its the better solution to forget about all this capacitor across diode stuff and use some schottkys like MBR10100.
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Old 20th February 2003, 07:13 AM   #13
Jay is offline Jay  Indonesia
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Quote:
Originally posted by Electro-Nick
Hi Jay

Do you have any experience with thes bridges ? That 10n value, did you calculate it or is it a commonly used value ?

I also downloaded that snubber/rectifier formula, but didn't get a proper calculation yet.

The value used on this bridge was chosen after reading about 'm on the net.

Grtz,
Nick

Hi Nick,

I don’t have any experiences with snubbers. But is that a snubber circuit you are building? I cannot see the resistor! The diode shown by Peter is of a faster type (TO-95?). You asked about the 10n. I think the snubber caps value is different from circuit to circuit.

Well, this is what Pete Godreau wrote in his article about this snubber:

“Since most everything else has been addressed, it seemed reasonable to see if anything could be done to improve the performance of this unit as well..”

If I get him right, I don’t have no reason why I should be bothered with such circuit. What I can see is that this is very microscopic. Something you should do with proper math and apparatus. Even a simple high/low pass filter, cannot easily be synchronized between calculation/theory and reality.

With rectifiers, I choose only the ones from good manufacturers (you can trust the product specs), slow or fast. For the noise (more importantly in CD player), adding EMI filter is a lot easier. Oh, I got several bridges, but I still cannot decide which one is the best, the fast ones or the slow ones. They are different, indeed.
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Old 20th February 2003, 12:23 PM   #14
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Hello Jay,

The problem with the calculation is that i don't know the exact working voltage and current yet. First i have to build the amp together, then i can measure some things. The pcb with diodes has already space to try a range of caps. Maybe indeed the cap can be left out. Also there is no resistor in yet.

The used diodes (MBR type) may be silent enough to do the job. I'll just have to try and see

It wouldn't be much fun if everything worked at once, then there would be no work left for us as DIY'ers

Grtz,
Nick
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Old 20th February 2003, 12:53 PM   #15
Jay is offline Jay  Indonesia
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Quote:
Originally posted by Electro-Nick
It wouldn't be much fun if everything worked at once, then there would be no work left for us as DIY'ers

Grtz,
Nick

What a statement! Unfortunately, DIY’er is not my primary occupation anymore. But still I waste my time (and money) on audio, just for fun.

BTW, what is the amplifier going to be? It must be single ended, Zen or Aleph. Why not try the circuit with CD player first? If you report a huge improvement, I will copy your circuit and apply it to my CDP without modification.
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Old 20th February 2003, 03:59 PM   #16
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An Aleph 5, of course....
Look at my website, i've posted some pics there. Maybe next weekend i'll fire it up.

Grtz
Nick

ps i'm also a part time DIY'er
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Old 20th February 2003, 04:15 PM   #17
JDeV is offline JDeV  South Africa
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Quote:
Originally posted by Electro-Nick
Look at my website, i've posted some pics there.
Goeie dag Nick
Some nice stuff you've build so far
What is the size and make of those caps and trafo of your A5?
Where is the pics of your finished BoSoZ ?

Groete
JDeV
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