Fuzzy OneThree
100+ Head-Fier
- Joined
- Nov 9, 2007
- Posts
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After having my cMoy for nearly a full year, I decided I was going to case it correctly in an Altoids tin (originally it was in a large and, frankly, a quite ugly wooden case). When I did that, I also rewired it with navship's silver wire so that it would fit. When I switched it on, the op-amp quickly heated up. The sound was barely audible, even when everything was turned up all the way. The weirder thing was that there would still be that small amount of sound even when the amp was turned off and even when I completely removed the battery. Albeit, the sound was extremely distorted, like when your battery got low on power and the opamp needed more power, but to a greater extent.
I picked up 2 op-amps at Radioshack for testing. The first one was LM386N which didn't overheat. Granted, it wasn't correct for the application and there was still the low volume when plugged in and distorted sound without the battery and no sound in the left ear. Next up was TLE082. This one heated up just like my original OPA2132PA.
So, still not having a solution, I took the next logical step. I built a new one from scratch. I followed tangent's instructions and it still had the same issues.
Now, pics. The first 3 pics are the original cmoy; next 2 are the new one.
P.S. They are louder when the battery is unplugged.
P.P.S. Battery is at 7.87 v, v- to ground is 4.74, v+ to ground is 3.10 for the new one. This is with no op-amp. R1 + is 4.70 ohm, R1 - is 4.68 ohm
I picked up 2 op-amps at Radioshack for testing. The first one was LM386N which didn't overheat. Granted, it wasn't correct for the application and there was still the low volume when plugged in and distorted sound without the battery and no sound in the left ear. Next up was TLE082. This one heated up just like my original OPA2132PA.
So, still not having a solution, I took the next logical step. I built a new one from scratch. I followed tangent's instructions and it still had the same issues.
Now, pics. The first 3 pics are the original cmoy; next 2 are the new one.
P.S. They are louder when the battery is unplugged.
P.P.S. Battery is at 7.87 v, v- to ground is 4.74, v+ to ground is 3.10 for the new one. This is with no op-amp. R1 + is 4.70 ohm, R1 - is 4.68 ohm