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18th August 2011, 08:04 PM
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#1 |
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diyAudio Member
Join Date: Jan 2006
Location: nea makri athens greece
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schematic error
can anyone see this schematic and tell me if this some printing error or drawing error ?
i dont actually find it very correct the midle pin of the trimmer that adjusts idle is conected to the output (???) can this be right ?
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SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr |
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18th August 2011, 08:17 PM
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#3 |
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diyAudio Member
Join Date: Jan 2006
Location: nea makri athens greece
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well ...wahab ( good to see you by the way ) this is from a greek made kit and i can tell you that the error exists also on the pcb i hold in my hands ....
Though i havent playing with this for almost 20 years now and i recall making a couple of those kits some 25 years ago that actually produced music ... i am trying to upgrade one of these and make it bit better ( has a gozillion mistake except this one ) thanks for the input
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SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr Last edited by sakis; 18th August 2011 at 08:26 PM. |
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18th August 2011, 08:17 PM
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#4 |
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diyAudio Member
Join Date: Nov 2008
Location: Oakmont PA
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The schematic is correct. There are dots where lines cross and they are connected. There are none where the lines just cross. At the pot wiper it looks like a dot, but that is the end bar! Of course since they increased the width of the output wire those dots are hard to see.
It is why my draftsman never connects four wires at a time, only three! |
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18th August 2011, 08:27 PM
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#6 |
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diyAudio Member
Join Date: Jan 2006
Location: nea makri athens greece
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ok ...just for fun
can somebody calculate to see what will happen if the midle pin is conected to the output? Can i imagine bias modulated with output or will it be worst ???
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SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr |
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18th August 2011, 08:36 PM
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#7 | |
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diyAudio Member
Join Date: Nov 2008
Location: Oakmont PA
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Quote:
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18th August 2011, 09:07 PM
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#8 |
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diyAudio Member
Join Date: Apr 2008
Location: Carlisle, England
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Its not the best of circuits, missing CCS and CM.
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http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software. |
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