tangent
Top Mall-Fi poster. The T in META42.
Formerly with Tangentsoft Parts Store
- Joined
- Sep 27, 2001
- Posts
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- 58
Quote:
If you are using a dual-channel op-amp chip, you might have damaged it, since pin 1 is the output for the first channel. If it's a single-channel chip, you probably didn't hurt anything, since pin 1 is usually either not connected internally, or it's for offset trimming in combination with pin 8 or 5, so with nothing connected to 8/5, nothing happens.
What you're hearing is not normal. The only path from the input to the output should be through the chip, and with no power to the chip, there should be no path. But since behavior changes when you change your audio source impedance, you may have some high-resistance short somewhere. Try cleaning your board and examining it for marginal connections.
I had V- connected to pin 1 instead of pin 4....after turning off the amp, I can still hear music |
If you are using a dual-channel op-amp chip, you might have damaged it, since pin 1 is the output for the first channel. If it's a single-channel chip, you probably didn't hurt anything, since pin 1 is usually either not connected internally, or it's for offset trimming in combination with pin 8 or 5, so with nothing connected to 8/5, nothing happens.
What you're hearing is not normal. The only path from the input to the output should be through the chip, and with no power to the chip, there should be no path. But since behavior changes when you change your audio source impedance, you may have some high-resistance short somewhere. Try cleaning your board and examining it for marginal connections.