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Alternate First Watt Power Supply Schematic
Alternate First Watt Power Supply Schematic
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Old 10th January 2019, 10:41 PM   #11
xbitwise is offline xbitwise  Europe
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Hi Jeff,

I would be interested in Gerbers as well.

Cheers,
xbitwise
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Old 11th January 2019, 01:07 AM   #12
gary s is offline gary s  Australia
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Hi Jeff.

Not sure how many actual PCB,s you had made, but if you have spares and want to recoup some money, I would be happy to buy some of the spare PSU boards off you.

Cheers,

Gary..
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Old 11th January 2019, 02:21 PM   #13
JeffYoung is offline JeffYoung  Ireland
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Alternate First Watt Power Supply Schematic
I do have 2 extra boards.

I had them done at Eurocircuits so they're high quality but also a bit on the dear side at 29/each. (6 of that is VAT, so they might make more sense for someone in the EU, but I'm happy to send them anywhere.)

I'll stuff a board in the next couple of days and assuming it works put up the Kicad files and Gerbers.

Cheers,
Jeff.
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Old 11th January 2019, 06:55 PM   #14
gary s is offline gary s  Australia
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Jeff, PM sent.

Regards,

Gary..
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Old 11th January 2019, 11:30 PM   #15
JeffYoung is offline JeffYoung  Ireland
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Alternate First Watt Power Supply Schematic
Extra boards are spoken for.

Here's the schematic:

Alternate First Watt Power Supply Schematic-decoupledpsuschematic-jpg

Cheers,
Jeff.
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File Type: jpg DecoupledPSUSchematic.jpg (354.7 KB, 812 views)
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Old 13th January 2019, 05:32 AM   #16
gary s is offline gary s  Australia
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Thanks for the schematic Jeff and email reply sent.

Cheers

Gary..
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Old 13th January 2019, 08:14 AM   #17
Berny is offline Berny  Belgium
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Quote:
Originally Posted by JeffYoung View Post
Hi Vince,
I've got a board design for that if you're interested.
Hello Jeff, I believe there is a safety issue with your board if you intend to use mains on that PCB as is done in the FW commercial products There are regulations and you need to keep minimum distances between mains voltages and your secondary transformer voltages.... I believe it is about 5mm but am not sure. Be aware...
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Old 13th January 2019, 03:51 PM   #18
SRMcGee is offline SRMcGee  United States
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Alternate First Watt Power Supply Schematic
Folks:

For what little it's worth, I remember using that sort of power supply design years ago when I started modifying my old Bottlehead Foreplay. Bottlehead referred to it as a "pseudo-dual" power supply. In their design, there was a single transformer, a set of rectifiers and then a shared capacitor bank and then the channels separated with each channel having its own cap bank as a second stage. I had previously used a single shared power supply and recall that the pseudo-dual variation was noticeably better.

Fun stuff!

Regards,
Scott
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Old 13th January 2019, 04:39 PM   #19
Vunce is offline Vunce  United States
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Alternate First Watt Power Supply Schematic
Quote:
Originally Posted by JeffYoung View Post
I'll stuff a board in the next couple of days and assuming it works put up the Kicad files and Gerbers.

Cheers,
Jeff.
Hi Jeff,
Id be interested in the Gerbers also.
What are the dimensions of your board? Thanks.

Regards,
Vunce
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Old 13th January 2019, 05:59 PM   #20
Murdoc is offline Murdoc  Germany
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Hi Jeff,
thank you so much for posting here, I am also hugely interested in the Kicad design, as I postponed mine for more than a year now.
I'm also very happy that you used Kicad, as I wanted to try the new version 6 and set it up so that it works for me (and the audio stuff we all use.).
Thank you!
Matthias
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