diyAudio Power Supply Circuit Board v3 illustrated build guide

[Dneu2011]

I ran out of 15000uf caps and have 4 3300uf caps. How can I use these on the new board and how many .47 ohm caps do I need to use?

 

[6L6]

What amplifier are you building?

 

[Dneu2011]

I actually am working through PCB boards I acquired and some I just purchased.

-F4
-F5
-M2x

I could swap any boards to make them work.

 

[6L6]

Use 15000uF (or bigger) capacitors. 3300 is much too small for a Firstwatt amp PSU.

 

[Dneu2011]

Sorry. I left off a 0.

I have 33000uf caps.

 

[Dneu2011]

I was thinking 2 33000uf caps on the inside sockets would work but need to know how many .47 ohm resistors to use.

 

[Baobei]

Input snubber

Sorry, newbie question coming:

1)
2) The input snubber is something worth doing. (Ignore the output snubber. ) Because you are using the AS-4218, I know that the values of 0.01uF+12ohm and 0.15uF work well.

I am thinking about using the Toroidy Audio Grade 400VA 2 x 18V. Does someone know the values for the input snubber (or can me help to interpret what I have found)?

500VA is said to be Cx: 10nF, Cs: 150nF, Rs: 7Ω / 7Ω. (On this list.) I can't use that for the 400VA, correct?

Someone measured it in this discussion, but I'm struggling to understand which value to use practically.

 

[tooppy]

On the First Watt PS drawing, could the capacitor in parallel to the 240VAC line, be something like that ?

ECQ-U2A332KL Panasonic | Mouser

 

[WKCox]

Yes. I have used that capacitor in my Pass power supply builds.

 

[kaliwraith]

For a class AB amp, do you think dual mono is better than 2x capacitance shared? Or does it depend on the magnitude of the capacitance being doubled?


For example, on a 150W @ 8 Ohms amplifier, would you rather have 20mF per rail per channel or 40mF per rail shared by both channels?

 

[Centurion53]

Just saw this.


No. Don't do that. One thermistor in series with the AC primary only.

The other CL-60 goes on the output of GND at the power supply.

6L6
The wires that run to and from the PS board appear to be a fairly large gauge, what gauge is best for that application?

 

[tooppy]

Now for the fuse fitting the IEC appliance inlet C14 of the A4 Deluxe chassis back plate.
As I will use 240VAC it should be 1.25A slow blow.
Is the size 5x20mm ?

 

[tooppy]

May be some of you has a good and simple way to separate the diode board.
Any suggestion welcome.

 

[tooppy]

Indian made :

YouTube

 

[Mark Johnson]

1. Utility Knife

2. Steel Ruler

3. Patience

_

 

[tooppy]

1. Utility Knife

2. Steel Ruler

3. Patience

_

That is exactly what I did !

 

[tooppy]

Here is where I am at the moment :

F-PSU-in-process.jpg - Google Drive

F-PSU-finished.jpg - Google Drive

 

[JeffYoung]

I'm not normally much of a video watcher, but that Indian amplifier PSU build was great. I get far too precious with stuff whereas he just gets on with it.

BTW, aren't the DIYA Store boards scored? Can't you just snap off the diode section?

 

[WKCox]

Exactly! I ordered power supply boards twice over the past year-and-a-half and both times they were snapped apart, courtesy of the US Postal Service. I hope the diyAudio store has found a better way of packaging other than in lightly padded envelopes which are easily folded to stuff into a mailbox.

 

[tooppy]

Here is where I am at the moment :

F-PSU-in-process.jpg - Google Drive

F-PSU-finished.jpg - Google Drive

Anyone can tell me if I missed anything here (beside the led ) ?