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Old 30th March 2014, 04:30 PM   #21
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Join Date: Aug 2010
Quote:
Originally Posted by palmito View Post
Hi. I'm interested in ps board and had a couple of questions:

1) Have yo checked if there are equivalent 120vac trafos for buyers with 120vac mains?

2) What is the mA output of each (5v & 15v)?

Thanks.
Hi palmito,

to be honest I didn't check for 110/120V equivalents. The GB was initially intended for European customers only and such was the development of the PSU boards.

The +/-15V part has a pinout for EI 48/16.8 core or alternatively the smaller EI 42/14.8 core each with single primaries and double secondaries.

The 5V part has pinout either for EI 38/13.5 core or for EI 30/12.5 core each with single primaries and secondaries.

Not sure if 110V/120V variants with this core sizes are available If anyone has a tip that would be very helpful.
As an alternative you can always use offboard transformers. I added holes for screwterminals (5mm leadspacing)

With the transformers specified in the BOM max. current will be arround 250mA for +/-15V and 350mA for 5V. With external transformers current can be higher if sufficient cooling is provided for the regs. Eventually you have to adjust the registor values in the CRC.

kind regards, Daniel
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Old 30th March 2014, 05:18 PM   #22
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Location: Columbus, Ohio
Default Dual 115V Block Transformers

EI 38/13,5 109 :: Trafo 3,2VA, 9V, 356mA is your

transformer and here's a dual 115V Block Transformers: Block APT 30/2/15.
Here's the WEB Site:

BLOCK Transformatoren-Elektronik GmbH :::: Products :::: PCB transformers :::: Product Details[]=5439617&v[]=5439625&v[]=5439626&v[]=5439627&v[]=5439628&v[]=5439629&v[]=5439618&v[]=5439620&v[]=5439621&v[]=5439622&v[]=5439623&v[]=5439624

EI 48/16,8 218Trafo 10VA, 2x 18V, 2x 277mA is your other transformer.

Here's a dual 115V equivalent: Block ADT 30/2/12.

Can your change the Power Supply PCB's that can use these transformers?

Last edited by mrsavage; 30th March 2014 at 05:29 PM.
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Old 30th March 2014, 05:28 PM   #23
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Location: Columbus, Ohio
Default Here's the PDF Manual Pages for these transformer

Here's the PDF Manual Pages for these transformer:
Attached Files
File Type: pdf BLOCK___APT_30-2-12.pdf (793.9 KB, 15 views)
File Type: pdf BLOCK___APT_30-2-15.pdf (793.9 KB, 8 views)
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Old 30th March 2014, 08:56 PM   #24
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The transformers from the PDFs are rated 30VA, much bigger than the ones used for the PSU
The Block AVC 3,2/2/8 and AVC 10/2/18 would be candidates with suitable cores and power ratings, however there are no detailed drawings available (i'll ask Block if they can send me some).
However this would require a rework of the boards (dual primaries, dual secondaries for the 5V) which is always some risk, takes some more time...Not really sure if I and the most of you would like to go that way The boards from the group buy have been successfully tested (and will be tested ones more before we order).
You still can use the external transformer and/or other LM317/337 PSUs are available here or there

kind regards, Daniel
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Old 30th March 2014, 10:17 PM   #25
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Default Remove me from the list for power supplies for this group buy

My name needs to be deleted from the group buy. I had hopes that changes
to the PCB's could be made so that either 120V or 230V could be used.
I'm sure that Block, the transformer company, does offer 120V/230V
versions. Split primaries is very common. Put the primaries in series and you get
230V, place them in parallel and you get 120V.
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Old 30th March 2014, 10:18 PM   #26
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Added myself to the list for DAC and PSU.

Cheers.
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Old 30th March 2014, 10:44 PM   #27
tuo is offline tuo  Finland
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Location: Hansestadt Lübeck, Germany
mrsavage, I deleted you from the form.

Rondandon: you better ask a confirmation for the quantities once more before ordering the boards. At least my number of PSU PCB:s was set to 1, but I want to have 3.
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Old 30th March 2014, 11:45 PM   #28
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Location: Columbus, Ohio
Default How did you create the Power Supply PCB?

What PCB tool did you use to create the Power Supply PCB's? Can you send me
the source files? Gergers? Let me know. Take care.
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Old 30th March 2014, 11:51 PM   #29
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Yeah I recognized that as well.. One day I had 1 as te quantity of the currymanDACs . After the GB will be closed I will freeze the Spreadsheet and ask everyone about the correct quantity.
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Old 31st March 2014, 12:24 PM   #30
Scuba is offline Scuba  Romania
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Hello,

I have added myself to the list: 1 x DAC, 2 X PSU's .

Thanks!
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