[liamstrain]

Quote:

can i ask where you got the instructions/parts to make this amp?

JDS labs, or the original - http://gilmore2.chem.northwestern.edu/projects/showfile.php?file=cmoy2_prj.htm

 

[Paul Blythe]

I used Tangent's 'How to build a CMoy' tutorial: http://tangentsoft.net/audio/cmoy-tutorial/
 
Everything you need to know about parts and building one is there.

 

[jeff m]

I'm going to piggy-back onto this thread =)
 
I just placed a digi-key order for parts to build my own tangent cmoy. Here is the parts list:
 

Index	Quantity	Part Number	Description	Customer Reference	Backorder Quantity	Unit Price	Extended Price
1	2	P5155-ND	CAP ALUM 470UF 25V 20% RADIAL	C1+/-	0	0.41000	$0.82
2	2	P4.70KCACT-ND	RES METAL FILM 4.70K OHM 1/4W 1%	R1+/-	0	0.15000	$0.30
3	2	P100KCACT-ND	RES METAL FILM 100K OHM 1/4W 1%	R2	0	0.15000	$0.30
4	2	RNF14FTD1K00CT-ND	RES MF 1/4W 1K OHM 1% AXIAL	R3	0	0.15000	$0.30
5	1	754-1267-ND	LED SS 5MM 640NM RED DIFF	D1	0	0.12000	$0.12
6	2	CP1-3513-ND	CONN JACK STEREO R/A 3PIN 3.5MM		0	1.47000	$2.94
7	1	226-1088-ND	KNOB BLK GLOSS.50"DIA .250"SHAFT		0	3.22000	$3.22
8	2	2238K-ND	STRAP BATTERY 9V I-STYLE 4"LEAD		0	1.18000	$2.36
9	1	OPA2134PA-ND	IC OPAMP AUDIO STER AB 8DIP	IC1	0	2.94000	$2.94
10	2	RNF14FTD10K0CT-ND	RES MF 1/4W 10K OHM 1% AXIAL	R4	0	0.15000	$0.30
11	2	S2KCACT-ND	RES MF 1/4W 2K OHM 1% AXIAL	R3	0	0.14000	$0.28
12	1	S8.2KCACT-ND	RES MF 1/4W 8.2K OHM 1% AXIAL	RLED	0	0.14000	$0.14
13	2	399-5466-ND	CAP FLM 1UF 275V POLYPRO MKP	C2	0	0.91000	$1.82
	Subtotal	$15.84
	Shipping	Estimate
	Sales Tax	unknown
	Total	unknown

 
I'm trying to keep the parts cost low, but splurged on the knob, heh. I already picked up radio shack 271-215 at my local store http://www.radioshack.com/product/index.jsp?productId=2062298 I decided to bump up the powersupply caps, and go for huge C2's because I'm not going for a mint tin.
 
This will be my first audio DIY, but I'm not new to electronics and soldering. I have a pair of Koss UR-40s which I will use with this, they have the 60ohm portapro driver. Target sources are my ipod, laptop, desktop pc, etc. Going with only battery power for now, planning on using two NiMH 9v's or two Lithium Li-MnO₂ primary 9v's
 

 

[jeff m]

Hmm, so the Radio Shack pot I listed above is not stereo. The "dual-ganged" stereo pot that radio shack sells is 100k, so I won't use that. I went to Frys and they didn't have any stereo pots, so I went ahead and ordered the Panasonic EVJ one from Digikey.
 
While I was at Frys I picked up two energizer lithium 9v batteries, and an enclosure that comes w/ a protoboard.