GC try

[Idefixes]

Since past month i read à lot stuffs of about GC and decided to try to build one for my office. The plaisant things with GC is de simplicity, the low number of parts and global coast but otherwise the big amount of evolution possibility. The first i will try is a NIGC based on LM375TF (I have 5 five in stocks). The trafo i will use is a 2x25V 300Va, some mur 1560 rectifier in double bridge, BG-N4.7µF and FC 1200µf for filtering.



Some 3D case views of what it could be : wood and steel mixing





PCB building, and parts soldering







Rectifier bridges



The fist evolution i will try is to add à valve (sovtek 6922) buffer.

Marc

[maxw]

Looks good

I am looking for a simple PCB image that I could use with the laser-printer-DIY-PCB method. Would it be rude to ask you to post an image of yours that I could print off if you have one?

[Idefixes]

Originally posted by maxw
Looks good

I am looking for a simple PCB image that I could use with the laser-printer-DIY-PCB method. Would it be rude to ask you to post an image of yours that I could print off if you have one?

I do you this evenig.

Marc

[moving_electron]

Originally posted by Idefixes


I do you this evenig.

Marc

And also if is not to rude to ask, could you also post the schematic you are implementing?

[Idefixes]

Here they are



On bottom side beetwin point 10-10 there is a 22k rsistor sodered and a straps beetwin point 11-11



The electrical schem is the same as BrianGT..

Marc

[Idefixes]

The wood structure of the case with Tx installed.



A case arrangement possibility





Marc

[Nuuk]

Nice effort Idefixes! You have obviously done your homework and put a lot of thought into your design.

If it sounds as good as it looks you will have a fine amplifier!

[BrianGT]

Looks nice.

Be sure that you tie the input gnd and power gnd together. I run a trace between the two, which is kind of hard to see in the pictures:
Layout picture: http://www.briangt.com/order/images/gc.gif
PCB picture: http://www.brian.prohosting.com/pics/pcb1.jpg
The trace goes between R1 and R2 between the two planes.

Wishing you the best and good luck with this!

--
Brian

[cdoggy81]

Hi Idefixes,
Can you post the schematic for the rectifier bridges as well? Thanks

[Idefixes]

Originally posted by Nuuk
Nice effort Idefixes! You have obviously done your homework and put a lot of thought into your design.

If it sounds as good as it looks you will have a fine amplifier!

Thanks Nuuk. A lot of my inspiration for the Valve buffer come out yours. I m waiting for two Sovtek 6922. Psu for these is based on a 80Va 2x25V tx with filtering trough BC056 1000µF/100V and 100µ/50V FC (all already in my stock) and 220R 3W resistor. For the heater i have a 10Va 2x9V and will use LM317 regulation.

Marc