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Old 26th January 2009, 04:26 PM   #101
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Quote:
Originally posted by raypalmer
I've got it plugged into the bulb tester at all times until I know forsure I've got a healthy device. As for the xformer, I tested it as suggested before installing it in the box and it worked like a peach.



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I may need to use a non-cellphone camera...
Hi Ray, I looked for the colour code of your xformer on line.
I found the diagram below and if it is correct, your primary is wired wrong. You have orange and yellow connected together and red / brown connected together??
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Old 26th January 2009, 05:04 PM   #102
AndrewT is offline AndrewT  Scotland
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if the primaries are wired out of phase then the transformer alone (open circuit secondaries) will have the test bulb brightly lit.
If the primaries are in phase then the test bulb will not even glow dimly.
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Old 26th January 2009, 06:32 PM   #103
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Yeah, I had that same doubt so I switched the primaries a few days ago, but it lit up my bulb, at present the bulb tester is totally dark.
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Old 26th January 2009, 06:58 PM   #104
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Hi Ray, if the diagram I posted is the same as the one on the side of your xformer, then you should connect the Brown/Orange to neutral and the Red/Yellow to Hot..
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Old 26th January 2009, 09:31 PM   #105
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I'll give it a go tonight when I get home. Will post results this eve.
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Old 26th January 2009, 09:34 PM   #106
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I have recently built Pedja Rogics regulated power supply for a TDA1543 DAC

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and now fancy having a go at CarlosFMs regulated snubberized power supply for my LM3886 chipamp.

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I have started to layout the components on strip board before I start to solder. I notice the schematic recommends use of MKT decoupling capacitors, would resin dipped ceramic decoupling capacitors work OK in these positions?

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I plan to use 10000uf BHC slit foil reservoir capacitors on these boards and wondered if there was a benefit increasing the capacitance from 10000uf to say 20000uf at a later date? (I thought I might add them where the rear capacitor is lying)

N.B The voltage regulators in the photo are LM317s and these will be replaced with LM338Ts, the capacitor in the rear of the photo is purely there as a counter weight.

Thanks again Nick for putting together a great website

Richard
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Old 26th January 2009, 09:45 PM   #107
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Richard, my (clear) preference is for the Pedja Rogic discrete regulated supply for the GC! And I reckon 10,000uF is enough for a GC but as ever, I won't discourage responsible experimentation!
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Old 26th January 2009, 10:03 PM   #108
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Quote:
Originally posted by Nuuk
Richard, my (clear) preference is for the Pedja Rogic discrete regulated supply for the GC! And I reckon 10,000uF is enough for a GC but as ever, I won't discourage responsible experimentation!
Yessss SIR!

I know, but I have all of the components and I understand where these components go...I'll have a go at the discrete version later.

Do you fancy doing a nice little layout drawing of the discrete supply?

Richard
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Old 26th January 2009, 10:12 PM   #109
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Quote:
Do you fancy doing a nice little layout drawing of the discrete supply?
I do one day but I don't have the time right now. IF I can find time to take a photo of mine I will do that. It's a fairly simple circuit and shouldn't present any problems.

Alternatively, see if you can get PCB's from Pedja at Audial for his regulated PSU.

So the supply you built for your 1543 wasn't Pedja's discrete, it was based on LM317/337?
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Old 26th January 2009, 11:36 PM   #110
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Okay audio1st I owe you a coke.


Now I think my secondaries are incorrect. Are they??
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