Cmoy Kit build

ecramer · « **on:** 14 Apr 2009, 10:32 pm »

Bought a CMOY kit off off of Tyrro should be a nice easy build. hope fully i can get it built faster then the Post office delivered it

Label/Receipt Number: 9102 1288 8230 0604 2296 45
Associated Label/Receipt:
Detailed Results:

Bullet    Delivered, April 14, 2009, 10:49 am, EAST STROUDSBURG, PA 18302
Bullet    Processed, April 12, 2009, 3:45 am, LEHIGH VALLEY, PA 18002
Bullet    Processed, April 08, 2009, 6:34 pm, PHILADELPHIA, PA 19116
Bullet    Processed, February 17, 2009, 7:00 am, FOREST PARK, IL 60130
Bullet    Electronic Shipping Info Received, February 13, 2009

rahimlee54 · « **Reply #1 on:** 15 Apr 2009, 01:02 am »

Where can I get one of those I have been wanting to build a cmoy but have never done it.

Thanks

ltr317 · « **Reply #2 on:** 15 Apr 2009, 01:20 am »

Hey Ed,

Are you going to use an Altoids can or something from Ratshack?

Paul

ecramer · « **Reply #3 on:** 15 Apr 2009, 02:12 am »

Quote from: rahimlee54 on 15 Apr 2009, 01:02 am

Where can I get one of those I have been wanting to build a cmoy but have never done it.

Thanks

I believe it came from here on . They have pretty good feedback I would post a link but its like a mile long

New Headphone Stereo Amplifier Kit DIY OpAmp Cmoy Amp - eBay (item 380117296880 end time May-13-09 10:33:59 PDT)

ED

ecramer · « **Reply #4 on:** 15 Apr 2009, 02:17 am »

My first thoughts run to building a nice wood or lexan box box but i may get lazy and use an altoids can

Quote from: ltr317 on 15 Apr 2009, 01:20 am

Hey Ed,

Are you going to use an Altoids can or something from Ratshack?

Paul

Mariusz · « **Reply #5 on:** 15 Apr 2009, 02:19 am »

Is that it ?????

ecramer · « **Reply #6 on:** 15 Apr 2009, 02:39 am »

That be the one. I tired to past the link in the normal way and it kept pasting itself on three lines and not showing up.

ED

Mariusz · « **Reply #7 on:** 15 Apr 2009, 02:51 am »

Quote from: ecramer on 15 Apr 2009, 02:39 am

That be the one. I tired to past the link in the normal way and it kept pasting itself on three lines and not showing up.

ED

No problemo - nice looking amp. I might get it as well for - cheap.

Mariusz

cryoparts · « **Reply #8 on:** 15 Apr 2009, 05:26 am »

Nice, make a build diary, those are useful!

Peace,

Lee

ecramer · « **Reply #9 on:** 25 Apr 2009, 10:41 pm »

I sat down and put my cmoy together really pretty straight forward build except for the one jumper they forgot to mention. I only had one channel when i first tried it. Checked my solder joints. for cold bad joints but everythinkg looked good started to trace outthe circuts and found a place that should have had a jumper. This thing will drive my BEYER DYNAMIC DT770-Pro 250ohm Closed Circumaural Studio Headphones to an insane level Bass is Good right?

i will burn it in over the weekend befor i comment on how it sound.

Now i guess i better finish building the box for it

ED

wiget · « **Reply #10 on:** 26 Apr 2009, 10:18 pm »

Hello, i bought the same kit and had the same problem (sound in the left channel only), could you tell me where is the missing strap ?

A picture would be perfect (i'm not good in electronic, i'm not good enough in english

)

Thank you

ecramer · « **Reply #11 on:** 26 Apr 2009, 10:58 pm »

Quote from: wiget on 26 Apr 2009, 10:18 pm

Hello, i bought the same kit and had the same problem (sound in the left channel only), could you tell me where is the missing strap ?

A picture would be perfect (i'm not good in electronic, i'm not good enough in english )

Thank you

Coming off the center tap of the volume follow the trace up and you will find a gap outloned in picture try placing a jumper there and you should be good to go

ED

wiget · « **Reply #12 on:** 26 Apr 2009, 11:03 pm »

Thank you for your quick and detailed answer, i did it but it still not working

Sounds comes only in left ear.

ecramer · « **Reply #13 on:** 26 Apr 2009, 11:31 pm »

Quote from: wiget on 26 Apr 2009, 11:03 pm

Thank you for your quick and detailed answer, i did it but it still not working

Sounds comes only in left ear.

Really not a lot to go bad with this

1. Get a flashlight and check your solder joints make sure they are all shiny not dull or wrinkled looking if so retouch them .

2. try wriggling the components see if one has a bad solder joint

wiget · « **Reply #14 on:** 27 Apr 2009, 11:40 pm »

I'm afraid it's a lost cause now, i tried wriggling, nothing, i check the solder, nothing, and now, i blew the pcb with soldering/desoldering components.

It was my first DIY project (in audio), it won't be the last even if this one was a failure.

Thank you for your time

wiget

cryoparts · « **Reply #15 on:** 28 Apr 2009, 12:10 am »

Quote from: wiget on 27 Apr 2009, 11:40 pm

I'm afraid it's a lost cause now, i tried wriggling, nothing, i check the solder, nothing, and now, i blew the pcb with soldering/desoldering components.

It was my first DIY project (in audio), it won't be the last even if this one was a failure.

Thank you for your time

wiget

Even if you lifted a trace, you should be able to use a wire and go point to point where the broken trace/solder pad is.

Lee

ecramer · « **Reply #16 on:** 28 Apr 2009, 12:41 am »

Quote from: wiget on 27 Apr 2009, 11:40 pm

I'm afraid it's a lost cause now, i tried wriggling, nothing, i check the solder, nothing, and now, i blew the pcb with soldering/desoldering components.

It was my first DIY project (in audio), it won't be the last even if this one was a failure.

Thank you for your time

wiget

Any chance you can get a picture of what you did to the board?

jrebman · « **Reply #17 on:** 28 Apr 2009, 05:08 pm »

Ed,

Is this through-hole construction or SMT?

-- Jim

ecramer · « **Reply #18 on:** 28 Apr 2009, 09:27 pm »

Quote from: jrebman on 28 Apr 2009, 05:08 pm

Ed,

Is this through-hole construction or SMT?

-- Jim

through-hole construction. sinle sided board. They did not give you a very big hole either to work with

jrebman · « **Reply #19 on:** 3 May 2009, 02:09 pm »

Ed,

Thanks -- any updates on performance?

-- Jim