Pictures of my gainclone

elizard · 10th June 2003, 09:29 PM

well just got a digicam from a friend for the purpose of taking pictures of the gainclone

The "public amplifier" thing on the bottom is the power supply (the knobs/pots do nothing, neither does chime/siren)

elizard · 10th June 2003, 09:31 PM

Up close and personal with the lm 3875

elizard · 10th June 2003, 09:32 PM

another closeup, this time of the entire amp (just one channel, the other is exactly the same)

elizard · 10th June 2003, 09:33 PM

This is what the amp cases look like (they used to be some sort of recorders, who knows), still don't have the face plates for them .. one day i'll make some

elizard · 10th June 2003, 09:34 PM

I'll post pictures of inside of the PS later tonight.

JOE DIRT® · 10th June 2003, 09:38 PM

elizard thanks for the pics....looks good!!!....are they the Lm3886`s.....any info on the final circuit that you used would be appreciated

Cheers!!The DIRT®

elizard · 10th June 2003, 09:57 PM

They're 3875's.
The circuit I used was peter daniel's inverted circuit. Riken 220k/10k resistors, black gate 4.7uF caps, and Panasonic FC 1000uF caps. The supply (pictures coming tonight) is 400VA, 2x22V secondaries toroid from Plitron (they have a LONG lead time), MUR1520 diodes forming the bridge. And I'm using a 4A fuse, hasn't blown so far, so it is fine.

Binding posts on one are crappy plastic type i pulled off of somewhere, and on the other are un-insulated nickel type .. both crappy
I almost got some wbt ones today, but it ended being $70 after shipping, plus customs so i changed my mind and got LOTS of blue LEDs instead .. 100 to be exact
I'll probably leave some 30 for myself, and offer the rest here for fairly cheap. Something along the lines of $0.50-$0.75 each .. i'll post info of that later

karma · 10th June 2003, 10:21 PM

ho no not another one

looks good. yes post more pic's.........

good to see it worked out for ya

Prof · 10th June 2003, 10:22 PM

Just look at what elizard has produced, and I mean this with the greatest of respect, a chip with a bunch of wires hanging off it, sitting on top of an old PA amplifier case. The really GREAT thing about this (having just built a Gainclone that looks like a plate of spaghetti), is that we know just how good these things sound. I reckon there`s many a manufacturer building and selling amplifiers costing a lot of money that sound no where near as good as a Gainclone

Thomas · 10th June 2003, 11:08 PM

Nice work. It seems like the new trend is bulding GC's into all sorts of old gear.

10th June 2003, 10:22 PM	#9
Prof diyAudio Member Join Date: Jun 2003 Location: Birmingham	You`ve just gotta love this Gainclone nonsense! Just look at what elizard has produced, and I mean this with the greatest of respect, a chip with a bunch of wires hanging off it, sitting on top of an old PA amplifier case. The really GREAT thing about this (having just built a Gainclone that looks like a plate of spaghetti), is that we know just how good these things sound. I reckon there`s many a manufacturer building and selling amplifiers costing a lot of money that sound no where near as good as a Gainclone

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10th June 2003, 09:34 PM	#5
elizard diyAudio Member Join Date: Mar 2003 Location: Winnipeg, MB	I'll post pictures of inside of the PS later tonight.

10th June 2003, 09:38 PM	#6
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	elizard thanks for the pics....looks good!!!....are they the Lm3886`s.....any info on the final circuit that you used would be appreciated Cheers!!The DIRT®

10th June 2003, 09:57 PM	#7
elizard diyAudio Member Join Date: Mar 2003 Location: Winnipeg, MB	They're 3875's. The circuit I used was peter daniel's inverted circuit. Riken 220k/10k resistors, black gate 4.7uF caps, and Panasonic FC 1000uF caps. The supply (pictures coming tonight) is 400VA, 2x22V secondaries toroid from Plitron (they have a LONG lead time), MUR1520 diodes forming the bridge. And I'm using a 4A fuse, hasn't blown so far, so it is fine. Binding posts on one are crappy plastic type i pulled off of somewhere, and on the other are un-insulated nickel type .. both crappy I almost got some wbt ones today, but it ended being $70 after shipping, plus customs so i changed my mind and got LOTS of blue LEDs instead .. 100 to be exact I'll probably leave some 30 for myself, and offer the rest here for fairly cheap. Something along the lines of $0.50-$0.75 each .. i'll post info of that later

10th June 2003, 10:21 PM	#8
karma diyAudio Member Join Date: Feb 2003 Location: hamilton,ontario	ho no not another one looks good. yes post more pic's......... good to see it worked out for ya

10th June 2003, 11:08 PM	#10
Thomas diyAudio Member Join Date: May 2001 Location: Right here	Nice work. It seems like the new trend is bulding GC's into all sorts of old gear.