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Alternate First Watt Power Supply Schematic
Alternate First Watt Power Supply Schematic
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Old 20th January 2019, 09:12 PM   #31
JeffYoung is online now JeffYoung  Ireland
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Alternate First Watt Power Supply Schematic
BTW, if anyone happens to notice the rectifier/snubber board on the front of the case in my test pictures, I posted the Gerbers for that over in the F3 thread: F3 Builders Thread.

Cheers,
Jeff.
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Old 20th January 2019, 09:13 PM   #32
gary s is offline gary s  Australia
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That looks just like Nelson's workbench Jeff, nice work.
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Old 21st January 2019, 12:55 AM   #33
PKI is offline PKI  United States
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Alternate First Watt Power Supply Schematic
Hi Jeff, are you planing to make some small run for these boards or if you have some extras I would be interested :-)
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Old 21st January 2019, 06:45 AM   #34
Juntuin is offline Juntuin  Finland
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Thanks for sharing files Jeff. Going to try this one, not right now, but in near future!
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Old 21st January 2019, 11:01 AM   #35
JeffYoung is online now JeffYoung  Ireland
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Alternate First Watt Power Supply Schematic
@PKI, I did a (very) small run but they're all already spoken for (2 sold and 1 reserved for Kumar).

It sounds like there's enough interest though for someone to organise another run. It might make more sense to do it from the States so everyone doesn't have to pay 21% VAT....

Cheers,
Jeff.
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Old 13th February 2019, 06:14 PM   #36
darrr is offline darrr  Poland
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Hello. Do I understand correctly: the entire hot line must be omitted if I have to build a device without grounding ?
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Old 13th February 2019, 06:33 PM   #37
JeffYoung is online now JeffYoung  Ireland
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Alternate First Watt Power Supply Schematic
Yes. (Or you need to increase the clearances on it.)

The easiest thing to do is to use a barrier strip to mount your thermistor.

Click the image to open in full size.
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Old 13th February 2019, 06:58 PM   #38
darrr is offline darrr  Poland
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Thanks. Maybe I will use a soft start instead of a thermistor. probably better in the case of installations without PE
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Old 13th February 2019, 09:01 PM   #39
md_Stryker is offline md_Stryker  United States
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Has anyone created a board for the more typical First Watt style PSU?
Like this one:

https://www.diyaudio.com/forums/atta...1&d=1550091604
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Old 13th February 2019, 09:16 PM   #40
silasmellor is offline silasmellor  Denmark
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Alternate First Watt Power Supply Schematic
This one fits that bill, or the store one.
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