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Another Tangent CMoy Amp [6 pics] - Page 2

post #16 of 19
11/1/11 at 12:55pm
Quote:
Originally Posted by Penpal View Post

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

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post #17 of 19
11/1/11 at 5:23pm
Thread Starter 

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.

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post #18 of 19
11/2/11 at 1:34pm

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

 

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post #19 of 19
11/8/11 at 9:46am

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.

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