Hum Pot adjustments [resolved]
- Thread starter ArtnShit
- Start date
How were your voltage checks? Are both of the trim pots turned all the way up?
One common problem that we find sometimes is that some speaker spades don't always fit well into our binding posts, so I would start there.
Otherwise the path of debugging your issue would involve likely both posting some photos of the build of the non working channel, as well as potentially playing a 60Hz tone into the amp and taking some AC voltage measurements in certain spots to see where the signal isn't making it through.
Otherwise the path of debugging your issue would involve likely both posting some photos of the build of the non working channel, as well as potentially playing a 60Hz tone into the amp and taking some AC voltage measurements in certain spots to see where the signal isn't making it through.
I am not using spades, just putting the speaker wire into the posts, but that has always been fine in the past for me. Here are some pics of the full build I took. I am wondering if my connection to the right input is not so good. When I turn the amp on I hear the low-pop from both speakers if that helps with anything.
Attachments
The two things I see are a strand or two of wire hanging around the trim pot that may be shorting the signal out, and possibly the center pin connection to the RCA jack is low enough that it's touching the outside portion of the jack.
What DC resistance do you read across the RCA jack? Something well below 100K would confirm one or both of the above are causing some problems.
What DC resistance do you read across the RCA jack? Something well below 100K would confirm one or both of the above are causing some problems.
The center pin and the outside.
That is what's expected.
What I would suggest is picking up a meter with a lower AC voltage setting, an old phone/tablet with an 1/8" headphone out, and an 1/8" to RCA adapter.
Harbor Freight has a meter for about $25 that can resolve low AC voltages.
With these items in hand, we can trace signal through your amp.
One other thing you could try is to unscrew the C4S board and tilt it up out of the way a bit, then post a picture of the 9 pin socket wiring.
What I would suggest is picking up a meter with a lower AC voltage setting, an old phone/tablet with an 1/8" headphone out, and an 1/8" to RCA adapter.
Harbor Freight has a meter for about $25 that can resolve low AC voltages.
With these items in hand, we can trace signal through your amp.
One other thing you could try is to unscrew the C4S board and tilt it up out of the way a bit, then post a picture of the 9 pin socket wiring.
Is this meter sensitive enough to use? Borrowed from work but can grab a different one if need be. I will also have the RCA adapter tomorrow, so I can run the tests.
Another thought - I am also using a newly completed but never tested Beepre2 that I built. Is it more likely the problem is occurring in the Kaiju? The BeePre passed every voltage test on the first go.
I am also attaching some photos of the D-socket.
Let me know what you think, and thank you for walking through all of this with me.
Another thought - I am also using a newly completed but never tested Beepre2 that I built. Is it more likely the problem is occurring in the Kaiju? The BeePre passed every voltage test on the first go.
I am also attaching some photos of the D-socket.
Let me know what you think, and thank you for walking through all of this with me.
Nope, that still has a 200V minimum scale.
