Hi, I hope someone can help me with this question. I’m working on a Trends audio TA-10.2 board which I’m adding to a new chassis. The amp has a Tripath TA2024 chip. The board should be able to run in a “power amp” mode by by-passing a potmeter with a little jumper. However when I do this, or by running some new signal lines to the input caps, the amp shuts-off, the output terminals go completely quiet. Fortunatly the amp seems to recover after a periode of being turned off.
I suspect the line-in signal (several sources have create the same issue) is to hot for this amp.
What would be the suggested way to solve this issue. I’d obviously rather not put a additional component in the signal path.
I suspect the line-in signal (several sources have create the same issue) is to hot for this amp.
What would be the suggested way to solve this issue. I’d obviously rather not put a additional component in the signal path.
Ooooops, thanks Mooly.
My Ipod, which I use as a testing source, measure 0.1vdc at max volume.
I've ordered some bits to build 3dB attenuation at the input, I read somewhere that series 10 ohm, shunt 100 ohm, series 10 ohm would do this.
My Ipod, which I use as a testing source, measure 0.1vdc at max volume.
I've ordered some bits to build 3dB attenuation at the input, I read somewhere that series 10 ohm, shunt 100 ohm, series 10 ohm would do this.
I assume you mean the input is at too high a signal level for the amplifier so you need an attenuator but not with the values that you suggest. These would probably load the source too much by shunting 110Ω across it. Aim for an input resistance of around 5 - 10kΩ as a ball park figure.
There was no need to remove the pot. from the input This could be have been used as a pre-set level control to avoid overloading the amplifier. No need to bring it out to a "user control" if you just need it as a set and forget adjustment.
There was no need to remove the pot. from the input This could be have been used as a pre-set level control to avoid overloading the amplifier. No need to bring it out to a "user control" if you just need it as a set and forget adjustment.
Hi John, taking the pot out of the signal path did inprove the sound. Trend audio has provided an option for taking the pot out via jumper and this is intended/design as to run the amp in a power amp mode. I suspect you are right that the pot in de signal path was also avoiding the amp from becoming overloaded. But I'd like to do away with it if possible.
So are you suggesting just a single 5-10ohm resister in series and no shunt?
So are you suggesting just a single 5-10ohm resister in series and no shunt?
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