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

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

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.

buffer with cables.

the coupling caps sets up at the bottom of pcb.
OK,then the tube buffer is completed!

Zang

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.

the bottom view of amp board,I have not set up the 'T' network.

buffer has set up on the amp.

looks good digi...got any pics of the housing your going to put it in?

Digi, do you have a submarine ?:bigeyes: