Recent content by cornman
  1. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Maybe I didn't make that very clear but I was not using my headphones with my sound system, rather, I was using the cmoy to preamp the signal coming from my sansa fuze going into my stereo and playing through my speakers and subwoofer.   Without the cmoy I have to turn the fuze and the...
  2. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    That looks good but a bit expensive considering the amp only cost around $20 to build. I'd like to find a cheaper option.
  3. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Hmm, I had no idea about the reverse polarity thing, I'll have to be careful when replacing the battery. Also, do you know of any way to improve the battery life besides just hooking up batteries in parallel? The new op amp I'm using requires at least 18 volts and these 2 9 volts hooked up in...
  4. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Ok I just replaced the op amp and it works!! So that was the problem the whole time, I could have saved myself a lot of trouble by just trying that first lol. Thanks for all the help I really appreciate it!
  5. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Ok so the big caps are rated for 35v and the smaller ones are rated to 100v so I doubt thats the problem. Also thanks for the info Gaudeamos I had no idea about that but it makes sense now that I think about it. What exactly is the rail splitter? I looked up the part number and it looks like an...
  6. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    How exactly do you check for blown caps? They all look fine, is there a way to test it with a multimeter? Ok here's a pic if that helps.
  7. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Im currently tracing the signal as described here http://tangentsoft.net/audio/trouble.html playing a 1000hz sine tone from audacity and im getting .6 volts from ground to input jack as described in step 1 but when i get to step 3 (from ground to + in on the op amp) its giving me 2 volts??? That...
  8. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    ok finally i have gotten somewhere! I was using headphones to test it and i got nothing so i decided to plug some speakers into it and i can actually hear some music playing from only the left side when the pot and source are turned up all the way but it is very quiet and distorted sounding. Is...
  9. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Ok ive tried everything i can think of, checked connections, resoldered all connections, tested all resistors, still nothing. Do you think its most likely the op amp?
  10. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Ok I have a multimeter but how exactly would I go about doing that? Just checking the resistance im assuming? And what exactly should I be looking for?
  11. cornman

    Cmoy amp stopped working. Troubleshooting ideas?

    Ok a while ago i built a cmoy amplifier from parts ordered from digikey and it actually worked perfectly with no problems. I was mostly using it in my car to amp my fuze for use with my sound system and i decided to hook the power up to the dc 12v from the cigarette lighter so i wouldn"t have to...
  12. cornman

    Why are iems so cheap on ebay?

    Oh wait i just realized you said ie7 for some reason i thought you said gr07. I must be tired
  13. cornman

    Why are iems so cheap on ebay?

    Damn lucky man. I'll have to keep my eye out.
  14. cornman

    Why are iems so cheap on ebay?

    Ah my mistake. Btw how are the gr06 compared to the 7's? Also how are the gr06 with metal music?  
  15. cornman

    Why are iems so cheap on ebay?

    I was just looking at the gr06 on amazon and they are going for 180 new. Then I decided to go on ebay and check them out and they're selling for 70 new?? I just don't see how this is possible assuming this is a reliable seller which I am assuming given the 99% positive feedback. There are also...
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