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Old 26th March 2007, 05:54 PM   #1
BrianGT is offline BrianGT  United States
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Default new batch of mini Aleph amplifier and PSU boards

I had another batch of mini Aleph amplifier boards made, and power supply boards to go along with them. They are the same as the last batch and details on the boards can be found here:
http://diyamps.com/aleph/

This time, the boards have a black solder mask, white silkscreen, and gold plating.

As with last time, the amplifier pcb set is scored and easily breaks into 6 individual pcbs: 2 main amp boards, and 4 output device boards. The main board will work in the mini-A configuration without any output boards, or in the Aleph30 configuration with the use of the output boards.

I will put the boards up for ordering tonight/tomorrow morning on my website.

Pricing:
Amplfier pcb set: $9
Power supply board: $9

Shipping will be via USPS Priority/Global Priority, and will be $6 for US, and $11 for International orders.

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Old 27th March 2007, 08:44 PM   #2
Jaac is offline Jaac  Netherlands
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Looks very nice !

If you see this, than why not order a set ?? let me think, do i need those board ?? no ! but they're very nice
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Old 28th March 2007, 04:34 AM   #3
jleaman is offline jleaman  Belgium
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Default Very Nice !

Very Nice Brian

I think ill have to order a set to just have a set, I'll then have the red blue and red-smd now black/gold

To bad you don't use the ones we built when i was there.
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Old 29th March 2007, 03:08 AM   #4
batee is offline batee  United States
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The PS boards are beautiful! I'm considering a bunch of these for other projects I have going.

Any rough guesses at the current capacity of the PS boards?

Also: I checked the website and couldn't find a PS schematic. I'm having trouble visualizing how one bridge is fed by two two-wire AC inputs? I can see either a single three-wire, but not two two-wire inputs.

Thanks!

Bryan A. Thompson
bryan@batee.com
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Old 29th March 2007, 03:15 AM   #5
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by batee
The PS boards are beautiful! I'm considering a bunch of these for other projects I have going.

Any rough guesses at the current capacity of the PS boards?

Also: I checked the website and couldn't find a PS schematic. I'm having trouble visualizing how one bridge is fed by two two-wire AC inputs? I can see either a single three-wire, but not two two-wire inputs.

Thanks!

Bryan A. Thompson
bryan@batee.com

The 2 in the middle can be shorted if you have a 3 wire transformer.. I used a 3 wire and a 4 wire.. With the 4 wire transformers you can twist the 2 together and make it a 4.. Want me to post a picture of the bottom of the board ?

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Old 29th March 2007, 03:41 AM   #6
batee is offline batee  United States
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The bottom view explains what's happening with the AC inputs. It appears that they're already shorted via the connecting trace. That was the part that I was missing.

The rail traces look quite wide, so they aren't a concern to me. Do you think the traces between the AC input pads and the diodes will support 10A? 15A? I suppose that if there is space for six 3W resistors, and I use the leftover .47Ohm Panasonics sitting on my shelf, they would support 15A. I don't have a part number in mind, but think I've seen some fast diodes in a TO220 package that support 15A.

Thanks!

Bryan
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Old 29th March 2007, 04:05 AM   #7
jleaman is offline jleaman  Belgium
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15A what are you building ? thats a-lot of current.
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Old 29th March 2007, 04:29 AM   #8
batee is offline batee  United States
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Quote:
Originally posted by jleaman
15A what are you building ? thats a-lot of current.
An arc welder.

:bs:

Bryan
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Old 29th March 2007, 04:49 AM   #9
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Naw, a 500VA 20+20 trafo can push over 12A. I don't think 15A is too much to ask, and if you doubt the traces, you could always jumper over them too. I bet you'd be fine tho...

Man, if I didn't already have enough alephs I'd jump on this. They look great and the price is right
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Old 29th March 2007, 10:03 PM   #10
pchw is online now pchw  United States
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Waiting for the Currently out of stock text to change
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