Another LM3886 Kit Completed

widman · 9th April 2006, 08:17 PM

I started this amp last Spring and only just got around to finishing it. The chassis is 1/4" aluminum, held together with stainless screws. The top and bottom panels are perforated aluminum and the side panels are cherry.

Silver-clad copper wire is used for the connections to the power supply board and to the speaker outputs with teflon spaghetti tubing from McMaster-Carr for insulation. The heat sink is made from a piece of titanium-clad copper buss bar, which I milled to remove the titanium on one side. I use a 10K Noble pot from Electronics Goldmine for volume control.

I'm intending to use it in my bedroom with a Squeezebox to pull music from my server. Now I just need to make a small set of speakers.

widman · 9th April 2006, 08:18 PM

Guts:

widman · 9th April 2006, 08:19 PM

Amp Section

widman · 9th April 2006, 08:20 PM

Power Supply:

widman · 9th April 2006, 08:21 PM

Rear Panel:

neutron7 · 9th April 2006, 08:24 PM

very nice job! if you dont mind me asking where can you get perforated aluminium. i have been looking for some!

(please dont say onlinemetals.com the government loves to rip me off big time importing from there!)

widman · 9th April 2006, 08:35 PM

I bought the perforated aluminum from McMaster-Carr, which probably isn't any better than ordering from Online Metals.

digi01 · 10th April 2006, 08:20 AM

beautiful

G4ME · 12th April 2006, 02:21 AM

Is that a Noble Pot?

How did you make the connection to it? solder right to the leads or use some fancy clips?

widman · 12th April 2006, 12:45 PM

Yes, it is a noble pot and I soldered directly to the leads.

10th April 2006, 08:20 AM	#8
digi01 diyAudio Member Join Date: Mar 2003 Location: BEIJING	beautiful __________________ 2010 DIY ALBUM UPDATED UCPv1(preamp) & DUAL(power supply)

12th April 2006, 02:21 AM	#9
G4ME diyAudio Member Join Date: Jun 2003 Location: Location: Location	Is that a Noble Pot? How did you make the connection to it? solder right to the leads or use some fancy clips? __________________ Two little mice fell in a bucket of cream. The first mouse quickly gave up and drowned. The second mouse, wouldn't quit. He struggled so hard that eventually he churned that cream into butter and crawled out.

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9th April 2006, 08:24 PM	#6
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	very nice job! if you dont mind me asking where can you get perforated aluminium. i have been looking for some! (please dont say onlinemetals.com the government loves to rip me off big time importing from there!)

9th April 2006, 08:35 PM	#7
widman diyAudio Member Join Date: Feb 2004 Location: Deep Elem	I bought the perforated aluminum from McMaster-Carr, which probably isn't any better than ordering from Online Metals.

12th April 2006, 12:45 PM	#10
widman diyAudio Member Join Date: Feb 2004 Location: Deep Elem	Yes, it is a noble pot and I soldered directly to the leads.

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