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Juma's Easy-Peasy Capacitance Multiplier
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Old 26th October 2018, 12:54 AM   #621
xrk971 is online now xrk971  United States
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Juma's Easy-Peasy Capacitance Multiplier
Default Small Cap Multiplier PCB by Prasi

Here are the Gerbers for the small Mark Johnson/Gtose BJT cap multiplier by Prasi. Thank you, Prasi!

Design can use pinouts compatible with TO-220 using TIP41/42 and BC850/860 for SOT23’s. Small resistors are 1210 and 2512 for the cap bleed-off resistors.

Note that this is untested.

Juma's Easy-Peasy Capacitance Multiplier-smd-sch-png

Juma's Easy-Peasy Capacitance Multiplier-smd2-png
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File Type: png smd-sch.png (9.8 KB, 1201 views)
File Type: png smd2.png (52.0 KB, 1190 views)
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File Type: zip CAP-MX-GTOSE-SMD_2018-10-23.zip (302.6 KB, 89 views)
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Last edited by xrk971; 26th October 2018 at 12:57 AM.
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Old 26th October 2018, 01:41 AM   #622
e_fortier is online now e_fortier  Canada
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Juma's Easy-Peasy Capacitance Multiplier
Thanks Prasi and X

I actually like this one better with the cap on the output and the led.

Maybe I’ll order a batch, just what I needed for my headphone amps.

Thanks guys
Eric
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Old 26th October 2018, 03:41 AM   #623
xrk971 is online now xrk971  United States
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Quote:
I actually like this one better with the cap on the output and the led.
Those, and the input bridges were my 2 cents worth of contribution to this board that Prasi made for use with HPA's.
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Old 26th October 2018, 07:45 AM   #624
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Many thanks, Prasi and X

I'm a slow DIYer but I'll surely make use of this boards in the power supply of my next Preamp.

Compact and great design!
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Old 26th October 2018, 01:52 PM   #625
prasi is offline prasi  India
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Juma's Easy-Peasy Capacitance Multiplier
You are welcome guys. here is the bottom side view as a stuffing guide as per the gerbers and sch posted by xrk971 in post #621
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File Type: png smd2_bottom.png (39.6 KB, 1027 views)
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Old 7th November 2018, 05:52 AM   #626
prasi is offline prasi  India
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An update in the smd design...
The R1/R5 pads didnt have solder mask opening in the earlier gerber files as per post # 625.. it was brought to my notice by pcbway via the order placed by e_fortier.

Such great is their customer service and technical capability. They check each order very very carefully, no matter how small the order amount is.

Sorry for the omission, my mistake. So I am posting revised gerber files.

I have also added transformer snubbers for the ac, albeit its slightly cramped.

regards
Prasi
Attached Images
File Type: png smd-sch-r1.png (10.1 KB, 404 views)
File Type: png smd-lay-r1.png (91.7 KB, 2161 views)
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File Type: zip CAP-MX-GTOSE-SMD_2018-11-07.zip (306.6 KB, 92 views)
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Old 7th November 2018, 06:32 AM   #627
e_fortier is online now e_fortier  Canada
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Hi Prasi

Thanks a lot, I just send PCBWAY your revised Gerber.

First time soldering SMD, at least I’ll have a few pcb for practice.

BR
Eric
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Old 8th November 2018, 04:47 PM   #628
prasi is offline prasi  India
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You are welcome Eric...
Plan the soldering process carefully and you shouldn't face any problems.
Understand that there are few smds on top layer too and Under the THT components, so adjust accordingly for proper geometrical level of tht component.
All the best for your build.

Regards
Prasi
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Old 12th November 2018, 01:07 AM   #629
passive420 is offline passive420  United Kingdom
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Prasi, are we allowed to use the IXYS rectifier boards you designed - Or can I get you to design something similar?
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Old 15th November 2018, 08:21 AM   #630
prasi is offline prasi  India
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Here is another little beauty by Juma.
Been thinking of making a star grounded single sided little supply in with on board rectifiers and CRC configuration.
regards
Prasi
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