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First DIY, CMOY:BB - Page 2

post #16 of 28
5/17/08 at 3:39pm
Thread Starter 
I tried my hand at soldering seriously. Gotta say it's easier than I thoguht it was. So it'll cost 50$ with all of the parts, including the items frwom tweaks?>
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post #17 of 28
5/17/08 at 5:41pm
Quote:
Originally Posted by funniecow View Post
Is there anyone that knows of or has a film showing a creation of a cmoy from start to end?
A picture is worth a thousand words. See this link.
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post #18 of 28
5/17/08 at 6:28pm
Quote:
Originally Posted by Ron.id View Post
A picture is worth a thousand words. See this link.
That is a good link. It is a good overview, but I would not follow those instructions unless I was going to make his CMoy.

I would highly recommend that the OP follow all of the steps as outlined on Tangent's website (if that is the CMoy you are going to build), TO THE LETTER. If you do not read all the material presented there or waver from his accurate instructions, you may come up with something that does not work or is riddled with problems.
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post #19 of 28
5/17/08 at 6:47pm
Thread Starter 
Well I tried going to digi-key to see what this would cost me and I came up with:

Index Quantity Part Number Description Customer Reference Backorder Quantity Unit Price
USD Extended Price
USD
1 4 P5552 CAP 220UF 35V ELECT NHG RADIAL 0 0.42000 $1.68
2 4 P3104 .1 UFD POLYPROPYLENE CAP 0 0.86000 $3.44
3 10 10.0KXBK RES 10.0K OHM 1/4W 1% METAL FILM 0 0.09800 $0.98
4 5 4.75KXBK RES 4.75K OHM 1/4W 1% METAL FILM 0 0.09800 $0.49
5 5 100KXBK RES 100K OHM 1/4W 1% METAL FILM 0 0.09800 $0.49
6 2 OPA2132PA IC DUAL FET HI SP OP-AMP 8-DIP 0 5.40000 $10.80
7 2 160-1708 LED 3MM HI-EFF RED DIFFUSED 0 0.09000 $0.18
8 4 CP-1412 CONN RCA JACK METAL BLK PNL MNT 0 1.05000 $4.20
9 2 360-1788 SWITCH TOGGLE SPDT 6A SLDR 5PCS 0 4.06000 $8.12
10 2 AE10034-ND IC SOCKET .300 8 DIP GOLD 0 1.44000 $2.88
11 5 47.5XBK RES 47.5 OHM 1/4W 1% METAL FILM 0 0.09800 $0.49
12 2 2238K STRAP BATTERY 9V I-STYLE 4"LEAD 0 0.86000 $1.72
13 2 P2U4103 POT 10K OHM 12MM HORZ MET BUSHIN 0 2.66000 $5.32
Subtotal$40.79
Handling$0.00
Shippingunknown
Estimated Sales Taxunknown
Totalunknown

The list link, for you to edit if I missed something.

Those are the parts I ordered, and it's double of the normal list. Spare parts, and hoping to build one for my girl friend as a hand made gift.

The only things I'm missing is the Radioshack board, the tins, and the (rechargeable)batteries. Do you guys know how much that'll add on to the total? I'm going with just priority mail, I'm not sure about the weight and dimensions of the box yet. To 96817 zipcode.

EDIT: I forgot to ask, am I suppose to go out and buy spools of red and black wires?

I've secured a soldering iron, solder, solder plunger, helping hands, and a hole puncher. Is there anything else that I left out like the red and black wires?
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post #20 of 28
5/17/08 at 10:39pm
Thread Starter 
I just wen tout and bought a tin of Altoids, and a tins of Sqyntz!. And a nine volt recharable battery, but I never thought about this, how do I charge it?
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post #21 of 28
5/18/08 at 1:25am
If it's a rechargeable, then you'll need a 9V Battery Charger. They should sell them at the same place that you bought the battery from.
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post #22 of 28
5/18/08 at 4:55am
Quote:
Originally Posted by funniecow View Post
Those are the parts I ordered, and it's double of the normal list.
Is there anything else that I left out like the red and black wires?
What's the purpose of 47.5 ohms resistor (no.11 in your list)?
Where is 1K resistors (R3 at the cmoy schematic) for feedback loop?

You better buy some cheap multimeters, to check resistor's resistance value, than try to figure out from looking at the color codes. This will greatly minimize the chance of putting the wrong resistors.

It's good also to buy extra 4.7K ohm resistors (about 10 pcs or more) since its cheap, and do resistors matching with multimeters. Put this matched resistors at R1 position, to minimize +- voltage imbalance.
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post #23 of 28
5/18/08 at 5:58am
Even though I've done the DIY thing quite a bit, I still prefer kits over sourcing my own parts, because most of the time you have to buy things from two or more sources, and the crazier the amps get the more places it seems you have to hit up for parts! One shipping charge is a lot better than lots of shipping charges. When I have the necessary setup I'll be utilizing Glass Jar to get the parts for my planned beta-22 build.
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post #24 of 28
5/18/08 at 4:39pm
Thread Starter 
Once, I finish this build, I want to try the beta-22 build, I've read soem great reiviews about itand seeing hwo it can power almost anything, 701 in my case, I want to try it. BUt I have to first figure out what are the different types of beta22s and what they are for.


So far I've acquired for the cmoy:
-2 tins (altonds, squyntz)
-9 volt battery
-hole puncher, singe (are there different sizes?)
-soldering iron
-all of the other soldering materials

All I have to do is run to Radioshack get the board, and send in the order to Digi-key.
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post #25 of 28
5/18/08 at 5:02pm
Quote:
Originally Posted by funniecow View Post
Well I tried going to digi-key to see what this would cost me and I came up with:

Code:
Index  Quantity  Part Number  Description  Customer Reference  Backorder Quantity  Unit Price
USD Extended Price
USD
1 4 P5552 CAP 220UF 35V ELECT NHG RADIAL   0 0.42000 $1.68
2 4 P3104 .1 UFD POLYPROPYLENE CAP   0 0.86000 $3.44
3 10 10.0KXBK RES 10.0K OHM 1/4W 1% METAL FILM   0 0.09800 $0.98
4 5 4.75KXBK RES 4.75K OHM 1/4W 1% METAL FILM   0 0.09800 $0.49
5 5 100KXBK RES 100K OHM 1/4W 1% METAL FILM   0 0.09800 $0.49
6 2 OPA2132PA IC DUAL FET HI SP OP-AMP 8-DIP   0 5.40000 $10.80
7 2 160-1708 LED 3MM HI-EFF RED DIFFUSED   0 0.09000 $0.18
8 4 CP-1412 CONN RCA JACK METAL BLK PNL MNT   0 1.05000 $4.20
9 2 360-1788 SWITCH TOGGLE SPDT 6A SLDR 5PCS   0 4.06000 $8.12
10 2 AE10034-ND IC SOCKET .300 8 DIP GOLD   0 1.44000 $2.88
11 5 47.5XBK RES 47.5 OHM 1/4W 1% METAL FILM   0 0.09800 $0.49
12 2 2238K STRAP BATTERY 9V I-STYLE 4"LEAD   0 0.86000 $1.72
13 2 P2U4103 POT 10K OHM 12MM HORZ MET BUSHIN   0 2.66000 $5.32
Subtotal$40.79
Handling$0.00
Shippingunknown
Estimated Sales Taxunknown
Totalunknown
Those are the parts I ordered, and it's double of the normal list. Spare parts, and hoping to build one for my girl friend as a hand made gift.

The only things I'm missing is the Radioshack board, the tins, and the (rechargeable)batteries. Do you guys know how much that'll add on to the total? I'm going with just priority mail, I'm not sure about the weight and dimensions of the box yet. To 96817 zipcode.

EDIT: I forgot to ask, am I suppose to go out and buy spools of red and black wires?

I've secured a soldering iron, solder, solder plunger, helping hands, and a hole puncher. Is there anything else that I left out like the red and black wires?
You didn't do much reading, did you

See Tweaks

470uf caps are almost universally recommended instead of the 220uf caps you have listed. Likewise, 0.47uf input caps over the 0.1uf caps.

Per a previous poster, you are missing the 1K resistors for R3. That said, the stock gain of 11 is really loud. If your phones are sensitive, it will be too loud. If IEMs, it will be unusable. I would suggest adding 2.21K resistors, which will get a gain of 5.5 (1 + 10k/2.21k). The added 4.75k resistors mentioned by another poster could also be useful here (gain ~3). I would still order some 1K as they are cheap and sometimes useful.

The IC socket you listed (AE10034-ND) while good, is quite expensive. I use the Aries sockets (A400-ND) which are around $.59 vs. $1.44 for the Assman you listed. Millmax is good as well.

The switches (360-1788) you list, while good, are also expensive. You might see what you can dig up at ratshack before you order.

EDIT: for caps, I would recommend Panasonic FM P12388-ND, and 495-1111-ND or 495-1118-ND for input caps. The input caps are metalized polyester vs. the polypropylene you have listed. As a material the polypropylene is better.
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post #26 of 28
5/26/08 at 12:08am
Thread Starter 
Alright, I started buying the parts, so far I've got:

9v battery
soldering iron
and maybe some tins form a donation.

But when I went to the store to look for some solder, I ran into a problem. For some reason the only types of solder they sell are "lead free".

Is there anyone out htere willing to donate some solder wiht lead in them? Or know where in Hawaii I can get solder with lead in them?

BTW when I said "solder materials" I was thinking, flux and sponge. OH BTW I found flux in a bottle. GO figure.
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post #27 of 28
5/27/08 at 10:39am
I don't like the sound of it. Bass booster?
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post #28 of 28
5/30/08 at 5:18am
The CMoy is a fun little build. I agree with the satisfaction that comes from the first time that you click it on and hear music, it makes all of the effort worthwhile.

My CMoy has the OPA2227P opamp, 470uf power caps, and TLE2426 rail-splitter. It is running 18v (2x 9v). I love it, it has treated me well. Plus, its fun when someone asks what it is, and I can pop the tin open to show them whats inside. Then when the ask "Where'd you get it?" I can say "Oh, I made it." And like the others have said, it will get you hooked. I am close to getting a pair of DT880s, and then I will build a Millett MAX hybrid. I can't wait.
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