Hi all,
I've assembled my B1 buffer, powered it up, and I only get sound coming from one side (left channel). I have tried swapping leads and used that process to identify which input channel works.
I only have a multi-meter and don't really know what I need to be inspecting to see which component may have failed (if indeed there is one which has failed).
Please let me know what photos or information I can provide which will help with fault finding. I am open to suggestions too, in case there's a process or something I can apply to further investigate where the fault is occurring.
Thank you all in advance
Regards,
Vlad
I've assembled my B1 buffer, powered it up, and I only get sound coming from one side (left channel). I have tried swapping leads and used that process to identify which input channel works.
I only have a multi-meter and don't really know what I need to be inspecting to see which component may have failed (if indeed there is one which has failed).
Please let me know what photos or information I can provide which will help with fault finding. I am open to suggestions too, in case there's a process or something I can apply to further investigate where the fault is occurring.
Thank you all in advance
Regards,
Vlad
I purchased the PCB and jfets from the pass website. I am assuming they were tested and working.
So either a part is bad or the board is bad... but I would hope the PCB is fine.
If you have tested the things suggested above you could try to see if you need to reflow any component legs, or just reflow them all.
And you might want to measure the resistances of the resistors to make sure you haven't switched them accidentally. Also make sure the capacitors are oriented with the + where it should be (if not they can get burned out) and have infinite resistance across them.
If you have tested the things suggested above you could try to see if you need to reflow any component legs, or just reflow them all.
And you might want to measure the resistances of the resistors to make sure you haven't switched them accidentally. Also make sure the capacitors are oriented with the + where it should be (if not they can get burned out) and have infinite resistance across them.
I had the same problem on a tube build yesterday. I took some resistance readings of both channels at connection points comparing the two channels and found my problem. Most problems are incorrect parts or cold solder joints. Take your soldering iron and go over all the joints of the bad channel. That is the first thing I would do. I played around with some of the Chinese assembled boards a few years ago and the ones I bought that did not work right worked fine when I did this.
Hi Russell, please see the photos taken of the board and associated connections from both sides. Please let me know if you want any close-ups.
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From memory its a 24VDC power-pack style supply. I'm going to get a universal PSU for it when I mount the whole arrangement inside a case. Any recommendations? Will it add any value by way of sonic performance?
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