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-   -   Juma's Easy-Peasy Capacitance Multiplier (https://www.diyaudio.com/forums/power-supplies/297921-jumas-easy-peasy-capacitance-multiplier.html)

Idefixes 18th November 2016 06:56 PM

2 Attachment(s)
Quote:

Originally Posted by thimios (https://www.diyaudio.com/forums/power-supplies/297921-jumas-easy-peasy-capacitance-multiplier-post4890240.html#post4890240)
Oh sorry,my fault:(
I mean in black & white for home etching.:)

Is that good for you?

thimios 18th November 2016 07:08 PM

Quote:

Originally Posted by Idefixes (https://www.diyaudio.com/forums/power-supplies/297921-jumas-easy-peasy-capacitance-multiplier-post4890561.html#post4890561)
Is that good for you?

That's it!
Thanks Marc:)

AndrewT 19th November 2016 07:58 AM

Quote:

Originally Posted by xrk971 (https://www.diyaudio.com/forums/power-supplies/297921-jumas-easy-peasy-capacitance-multiplier-post4890279.html#post4890279)
I am fine with 25mm dia for 4700uF 63v Nichicon caps (12.5mm spacing radial leads).

normally the bigger can capacitors have 0.4" pin pitch (10.16mm)

stocktrader200 21st November 2016 08:20 PM

you could use lower voltage ( 60v fets) with logic level gate drive to reduce the 4 + volts lost accross each mosfet
I used a 10uf cap and 220k resistor with 2N5551 to silence the power supply for a 6922 tube preamp.

olafk 23rd November 2016 07:08 PM

Test PSU
 
4 Attachment(s)
Hi, I have built a PSU free according to the Schematic which X has published in Post No. 95 with the parts I had on the shelf.
Will be tested next days or weekend. Looks good so far, not yet the optimal layout, but will developed. Just a few pictures for the entertainment :)

regards Olaf

thimios 23rd November 2016 07:13 PM

:lickface:
Waiting for the pcb.

xrk971 23rd November 2016 07:13 PM

Olafk,
Wowza! That's beautiful work man. :cheers:

That is Juma's schematic for qubie amp power supply. I only linked it.

I am bracing myself for insanely low levels of measured ripple. :)

olafk 23rd November 2016 07:37 PM

1 Attachment(s)
Hi thanks. PCB is released when everything works. Must still install a little cooling for the Fets, the discharge resistors must be finally on the PCB, some LED for check function and test everything. But looks already imposing :D
75 x 195mm. Maximum length that I can etch at home.

regards Olaf

propitious 23rd November 2016 09:54 PM

Olafk: That looks great...good work. I see you got the pinout correct on the P channel MOSFET so you must have read my post #110, or you used juma's original in his post #1 in Cubie3 thread. I am looking forward to hearing your listening impressions, and I think you will be very pleased as x is and I am.

erik777 24th November 2016 01:49 AM

What is the Voltage drop on this?

Quote:

Originally Posted by olafk (https://www.diyaudio.com/forums/power-supplies/297921-jumas-easy-peasy-capacitance-multiplier-post4895609.html#post4895609)
Hi thanks. PCB is released when everything works. Must still install a little cooling for the Fets, the discharge resistors must be finally on the PCB, some LED for check function and test everything. But looks already imposing :D
75 x 195mm. Maximum length that I can etch at home.

regards Olaf



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