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Old 25th July 2011, 12:42 PM   #181
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Quote:
Originally Posted by Josip_Del View Post
Sorry I meant 2SC/SA here only questionable suppliers
I'll add (actually I did... in "construction - advanced options") Mje340/350 can be the VAS 2sa970 / 2sc2240 can be small signal types. I included several input pair choices in "DIYA amp-devices".

BC's would work , make sure you use low voltage supplies + the highest vceo Bc's.

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Old 25th July 2011, 12:49 PM   #182
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Ok thanks I saw MJE but I prefer BD so that why ask. and how should supply look like how many mF? Thanks
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Old 25th July 2011, 01:33 PM   #183
farjon is offline farjon  Brazil
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Quote:
Originally Posted by ostripper View Post
Just checked overview vs. BOM vs. schematic ... BOM was right on, schema was missing C15 , and the PCB had c14 + c15 swapped. Thank you!!

Updated "package" is below...
I didn't find any attachment...
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Old 25th July 2011, 01:36 PM   #184
farjon is offline farjon  Brazil
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Quote:
Originally Posted by Josip_Del View Post
And one more question. Over here is impossible to get anything with ksc suffix so can I (We) use BD139/140 instead or go to something else?
If BD tried, I think power supplies only up to +-40 Vdc.

This is why I asked before how low it could go...
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Old 25th July 2011, 01:52 PM   #185
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Originally Posted by Sound_Buster View Post
If BD tried, I think power supplies only up to +-40 Vdc.

This is why I asked before how low it could go...
Danke just

PS uF if can someone?
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Old 25th July 2011, 03:59 PM   #186
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Quote:
Originally Posted by Josip_Del View Post
Danke just

PS uF if can someone?

50kuf for a stereo pair or 25k for each. Double that for lower ripple.
I have my "6 pack" for a similar OP stage X 2 -
Click the image to open in full size.

6 x 8200uf -100v Apex jr. samwha caps. CHEAP -15$ + PCB +35A bridge.

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Old 25th July 2011, 04:19 PM   #187
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Default suggested trafo

2 X 300Va standard 38-0-38v E-waste trafos (or new ones). 1 X 600-800Va / 40-0-40V unit , either choice will require a soft start. 2$ "el cheapo" will do(below 1+2). Started the above PS 100's of times -- works real nice , can use the trafo ac direct or the 68V positive rail to activate.

Will share PCB , if needed.

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File Type: gif SS.gif (57.6 KB, 4285 views)
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Old 26th July 2011, 02:12 AM   #188
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Default attachment --



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File Type: zip DIYA-amp-full.zip (533.1 KB, 4003 views)
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Old 26th July 2011, 07:06 AM   #189
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I can get hold of (original so they say) 2SA1380/2SC3502? What say you this for VAS?
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Old 26th July 2011, 07:28 AM   #190
Variac is offline Variac  United States
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Quote:
Originally Posted by AndrewT View Post
This project started out as a request from DIYaudio to Ost to design an amplifier for the Community and to make the PCB available through the DIYaudio shop.

Suggestions to organise pirate Group Buy seems to defeat the intent.
Absolutely! we contracted with OS for this design to be sold only through the diyAudio Store and we'd appreciate you all not pirating it!

Of course you can burn your own boards for your own use..


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