My First GC

dsavitsk · 14th June 2005, 09:04 AM

The GC is based on the BrianGT Rev 2 boards. The pre uses Nuuk's discrete buffer modified to send it's output to ground until the circuit is fully powered -- that buffer makes a nasty pop. It also has built in a NOS DAC, a USB -> S/PDIF converter as well as a hagtech bugle. As you might guess from all the wires, there is a slight hum in the pre that I have not managed to track down. There is a project page at http://www.ecp.cc/NIGC.html that has links to larger versions of the pics, and may have some info one of these days.

Tazzy · 14th June 2005, 09:30 AM

Nice work!

mod_evil · 14th June 2005, 01:25 PM

OH MY GOD! Your design of the case is very good! In the frist image is a pre-amp?

Nuuk · 14th June 2005, 03:12 PM

Yes nice work and....

Quote:

The pre uses Nuuk's discrete buffer modified to send it's output to ground until the circuit is fully powered

you have just beaten me to that job. Which circuit did you use?

dsavitsk · 14th June 2005, 07:33 PM

Quote:

Originally posted by mod_evil
OH MY GOD! Your design of the case is very good! In the frist image is a pre-amp?

Thanks. This was my first attempt at using both a table saw and a drill press. The first image is the pre and power amps sitting next to each other.

Quote:

Originally posted by Nuuk
you have just beaten me to that job. Which circuit did you use?

I used this simple circuit designed by amb at head-fi:

(link to a discussion about it) It reduces the thump, but does not remove it completely. I tend to consider it as a safety measure in case I accidentally turn on the pre while the power amp is on, but I still try not to do this.

Amb has since produced a more refined version.

-d

Nuuk · 14th June 2005, 08:22 PM

I have just tried the circuit using the NE555 and a relay and the result is completely silent turn on and off.

jaudio · 14th June 2005, 08:58 PM

Quote:

Originally posted by Nuuk
I have just tried the circuit using the NE555 and a relay and the result is completely silent turn on and off.

Nuuk Schematics Please.

Nuuk · 14th June 2005, 09:02 PM

Quote:

Nuuk Schematics Please

Please refer to this thread .

14th June 2005, 09:04 AM	#1
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	My First GC The GC is based on the BrianGT Rev 2 boards. The pre uses Nuuk's discrete buffer modified to send it's output to ground until the circuit is fully powered -- that buffer makes a nasty pop. It also has built in a NOS DAC, a USB -> S/PDIF converter as well as a hagtech bugle. As you might guess from all the wires, there is a slight hum in the pre that I have not managed to track down. There is a project page at http://www.ecp.cc/NIGC.html that has links to larger versions of the pics, and may have some info one of these days.

14th June 2005, 01:25 PM	#3
mod_evil diyAudio Member Join Date: Dec 2004 Location: Rio	OH MY GOD! Your design of the case is very good! In the frist image is a pre-amp? __________________ Brazilian Tube Amp Builder.

14th June 2005, 08:22 PM	#6
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	I have just tried the circuit using the NE555 and a relay and the result is completely silent turn on and off. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

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14th June 2005, 09:30 AM	#2
Tazzy diyAudio Member Join Date: Jul 2002 Location: Netherlands	Nice work!

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