Pics of my first gainclone!!

rampage101 · 16th April 2004, 01:13 AM

Its pretty much all done, just need to finish putting it in the case, then fix the volume control. I need a 20k pot I think, I used the NIGC design in BrianGT's PDF.

soundNERD · 16th April 2004, 02:06 AM

looks good,

im sure you know but if the case is metal you need the TF version of the chip, not the T version to prevent the voltage on the die of the chip from comming in contact with the case and shorting it to V-.

rampage101 · 16th April 2004, 02:18 AM

Yep. I've got 5 of the TF samples coming, but if I can get the insulator pads and screws then I can just use the setup I have.

DrSplodge · 16th April 2004, 03:17 AM

I agree, well done.

If your going to mount it into a box, you may want to get better speaker terminals (say bananas) instead of the spring-clip type.

The only other thing, hope its fused at that IEC socket of yours.

Thats about it from me, I'll shut up now

rampage101 · 16th April 2004, 04:30 AM

Fuse? Did someone say fuse?

/me hides shamefully in the corner

Yes, I gotta get some fuses for it. Would 1.5A slo-blow be sufficient for the AC Hot in line, like directly after the IEC socket?

DrSplodge · 16th April 2004, 07:04 AM

Depends what size toroid your using.

Anyway, the toroid usually suggests a certain inline fuse value.

Hope that helps....

rampage101 · 21st April 2004, 02:13 AM

Well, after i got home from my parents house after fully bolting everything into a case, I tried to test my amp. Well, arn't I intelligent in thinking the bolts holding the heatsinks to the will be fine. I forgot to insulate them. So I killed my chips, and have since been waiting for my 5 TF samples.

They arrived! Hopefully withing the next 4 hours I can have it setup and working again.

DrSplodge · 21st April 2004, 04:00 AM

Use thermal insulating pads between the chips and heatsink. Cos at the moment, it looks like your heatsink will have a -35V voltage on it due to the screw holding it to the heatsink.

And while your at it, when I built mine, I made clamps for the chips, rather than bolting them through the screw hole. That way, it'll avoid the screw from passing current onto the heatsink.

The best thermal insulating pads out there I reckon is the thermagon stuff. Fairly expensive though.

www.thermagon.com

giambi77 · 21st April 2004, 05:24 AM

How did you make that PCB??? Is there any copper on it? Did you just drill the holes?

Also, do you happen to have a link to that PDF of BrianGTs?

Looking good

S.C · 21st April 2004, 05:29 AM

I think that is basically point to point soldering with a "board" to hold it in place.

16th April 2004, 01:13 AM	#1
rampage101 diyAudio Member Join Date: Apr 2004 Location: NSW Australia	Pics of my first gainclone!! Its pretty much all done, just need to finish putting it in the case, then fix the volume control. I need a 20k pot I think, I used the NIGC design in BrianGT's PDF. __________________ What's a signiture?

16th April 2004, 02:18 AM	#3
rampage101 diyAudio Member Join Date: Apr 2004 Location: NSW Australia	Yep. I've got 5 of the TF samples coming, but if I can get the insulator pads and screws then I can just use the setup I have. __________________ What's a signiture?

16th April 2004, 04:30 AM	#5
rampage101 diyAudio Member Join Date: Apr 2004 Location: NSW Australia	Fuse? Did someone say fuse? /me hides shamefully in the corner Yes, I gotta get some fuses for it. Would 1.5A slo-blow be sufficient for the AC Hot in line, like directly after the IEC socket? __________________ What's a signiture?

21st April 2004, 02:13 AM	#7
rampage101 diyAudio Member Join Date: Apr 2004 Location: NSW Australia	Well, after i got home from my parents house after fully bolting everything into a case, I tried to test my amp. Well, arn't I intelligent in thinking the bolts holding the heatsinks to the will be fine. I forgot to insulate them. So I killed my chips, and have since been waiting for my 5 TF samples. They arrived! Hopefully withing the next 4 hours I can have it setup and working again. __________________ What's a signiture?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

16th April 2004, 02:06 AM	#2
soundNERD diyAudio Member Join Date: Sep 2003 Location: Illinois	looks good, im sure you know but if the case is metal you need the TF version of the chip, not the T version to prevent the voltage on the die of the chip from comming in contact with the case and shorting it to V-.

16th April 2004, 03:17 AM	#4
DrSplodge diyAudio Member Join Date: Jan 2004 Location: Adelaide	I agree, well done. If your going to mount it into a box, you may want to get better speaker terminals (say bananas) instead of the spring-clip type. The only other thing, hope its fused at that IEC socket of yours. Thats about it from me, I'll shut up now

16th April 2004, 07:04 AM	#6
DrSplodge diyAudio Member Join Date: Jan 2004 Location: Adelaide	Depends what size toroid your using. Anyway, the toroid usually suggests a certain inline fuse value. Hope that helps....

21st April 2004, 04:00 AM	#8
DrSplodge diyAudio Member Join Date: Jan 2004 Location: Adelaide	Use thermal insulating pads between the chips and heatsink. Cos at the moment, it looks like your heatsink will have a -35V voltage on it due to the screw holding it to the heatsink. And while your at it, when I built mine, I made clamps for the chips, rather than bolting them through the screw hole. That way, it'll avoid the screw from passing current onto the heatsink. The best thermal insulating pads out there I reckon is the thermagon stuff. Fairly expensive though. www.thermagon.com

21st April 2004, 05:24 AM	#9
giambi77 diyAudio Member Join Date: Dec 2003 Location: Northern CA	How did you make that PCB??? Is there any copper on it? Did you just drill the holes? Also, do you happen to have a link to that PDF of BrianGTs? Looking good

21st April 2004, 05:29 AM	#10
S.C diyAudio Member Join Date: Jun 2003 Location: Milpitas	I think that is basically point to point soldering with a "board" to hold it in place.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
My first Gainclone almost done (pics!)	maxw	Chip Amps	27	29th March 2005 11:14 AM
pics of my gainclone	saabie22	Chip Amps	4	14th June 2004 06:39 PM
Pics of my first gainclone	red	Chip Amps	2	23rd March 2004 08:46 PM
PICS: GainClone Monoblock pics	Rarkov	Chip Amps	19	17th April 2003 07:37 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read