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Pavel Dudek's super Gainclone group buy

Colour of the pcb

  • Black

    Votes: 31 37.8%

  • White

    Votes: 12 14.6%

  • Red

    Votes: 14 17.1%

  • Blue

    Votes: 13 15.9%

  • Yellow

    Votes: 3 3.7%

  • Green

    Votes: 13 15.9%
  • Total voters
    82
Jump to Latest
#241
ppcblaster,

Thanks a lot for this. I will get in touch with Russ

I think 4 inches (1ft piece cut to 3X4") is a good size, that should give me a heatsink 5 3/8 X 4 X 1. That should put it around 1 C/W. Think that is enough cooling? or should I consider bigger lengths.

Thanks again,
Dinesh
 
#244
zenesh said:
I am interested in a PCB too if it is still avialable. Dop me a mail when youa re back P-A thanks
Click to expand...

I have 6 spare boards and 2 spare parts packs that I bought in the group buys (I thought I would be building more than two but I don't see it happening right now).
Will sell them for the same price (no profit just to cover my expenses).
 
#247
Email enabled.
I will take only what it cost me (original price + shipping + paypal fee), just to get my expenses back.
I assume that shipping price (international) is the same here as in sweden (I don't have time to calculate exactly, If it will be more, on my account 🙂 ).

Original price for two pcbs including shipping was
325sek = 48.32$ + paypal fee(0.3$+3.9%) = 50.5$.

As for the parts, I've decided to to keep 2 spare boards + parts for now until I'll finish the project (sorry for that).
 
#248
Upupa Epops said:
No, it make ground loops...
Click to expand...


peranders said:
I would be a more diplomatic: I might work but not without development but more channels than two is hard to make it good if the original design is mono or stereo.
Click to expand...

If I use bridged mode, also one toroid per board?

Another question:
I tried to find the right voltage for bridged mode.
The specs of the LM4780 does recommend 25V DC (~18V AC) for 120W power.
What happens if I go beyond that, say like 30V or 35V?
 
#250
BNK said:
If I use bridged mode, also one toroid per board?
Click to expand...
A dream situation, no problems with that.

BNK said:
Another question:
I tried to find the right voltage for bridged mode.
The specs of the LM4780 does recommend 25V DC (~18V AC) for 120W power.
What happens if I go beyond that, say like 30V or 35V?
Click to expand...
A guess is that 2 x 24 VAC will work pretty good with sufficient cooling and not using the amp for disco.
 
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