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9th November 2005, 05:18 AM
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#1 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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VBITNGC building & comment
dear all,
the thread is starting for vgitngc project assembly & developent. project antetype below: T-network: the better feedback solution? Projects for next hollidays (the world smallest VBITNGC??) pcb boards set group order below: VBITNGC group buy Zang |
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9th November 2005, 05:34 AM
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#2 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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step by step assembly with photos.
the vbitngc has 3 units.the first assembly is tube buffer unit. Part list below: Tube PCB *1 E88CC*1 10K 2W*2 3.3K 0.4W*2 1uf 200V mkp *2 * the sch of tube buffer and amp ** the tube that I used is 6922.the coupling caps is 2 ero 0.47uf160v connected in parallel per channel. the source of suitable tube sockets: http://www.diyaudio.com/forums/showt...149#post758149 http://www.diyaudio.com/forums/showt...154#post758154 thanks dave |
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9th November 2005, 05:52 AM
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#3 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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the connection wires(from psu to amp) should be get ready now.there are 9 wires,I think the length 150(mm)-300(mm) is pretty.
the high current wires(3) is 1.2mm diameter.the others are 0.6mm diameter.I use the teflon cable. |
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9th November 2005, 05:54 AM
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#4 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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buffer with cables.
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9th November 2005, 05:59 AM
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#5 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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the coupling caps sets up at the bottom of pcb.
OK,then the tube buffer is completed! Zang |
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10th November 2005, 04:58 AM
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#6 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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the second assembly is amp unit.
The parts for the amps board were printed by their value on the boards. Part list below: AMP PCB *1 LM3875TF *2 50K log Poti stereo *1 330uF / 35V low ESR *4 180R 0.4W 1% *2 18K 0.4W 1% *6 47K 0.4W 1% *2 ** the bypass caps that I used is Fc 100uf/35V. |
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10th November 2005, 05:01 AM
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#7 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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the bottom view of amp board,I have not set up the 'T' network.
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10th November 2005, 05:03 AM
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#8 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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buffer has set up on the amp.
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10th November 2005, 05:26 AM
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#10 |
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diyAudio Member
Join Date: Aug 2003
Location: Prague,Czech Republic
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Digi, do you have a submarine ?
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