6n11 tube headphone amp - Page 2

Stefkorn · 10th February 2013, 12:47 PM

Quote:

Originally Posted by dobiejoe

Still no sound out of left side.

Replaced all resisters with 1%
replaced trimmer pots with 2K and tried 10K
both heater amps work and both sides of the tube amps work.

Anything else I need to try?

Check whether the output jack has a faulty connection, check the output capacitor, check the pcb for dry solder joints. As suggested above, a scope will be very useful at this point.

dobiejoe · 13th February 2013, 04:40 PM

anybody?

dobiejoe · 13th February 2013, 04:41 PM

I have no scope and can't throw parts at it all day..

raweseus · 15th February 2013, 05:19 PM

Try turning the device off, and using the ohm meter with probes as a way to check for breaks in the circuit.

With the device on, you can also input signal into it, and simply use multimeter to check for voltage, even with music playing left and right paths should still have approximately same voltage at each corresponding node.

I suggest less of a "replace parts" methodology and more of a investigate what exactly is wrong with it approach.

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13th February 2013, 04:40 PM	#12
dobiejoe diyAudio Member Join Date: Aug 2012 Location: Tampa FL	anybody?

13th February 2013, 04:41 PM	#13
dobiejoe diyAudio Member Join Date: Aug 2012 Location: Tampa FL	I have no scope and can't throw parts at it all day..

15th February 2013, 05:19 PM	#14
raweseus diyAudio Member Join Date: Nov 2012	Try turning the device off, and using the ohm meter with probes as a way to check for breaks in the circuit. With the device on, you can also input signal into it, and simply use multimeter to check for voltage, even with music playing left and right paths should still have approximately same voltage at each corresponding node. I suggest less of a "replace parts" methodology and more of a investigate what exactly is wrong with it approach.