Bottlehead Forum
Bottlehead Kits => Crack => Topic started by: mfryan on January 21, 2017, 01:45:13 PM
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Hey everyone,
I know this has come up before and seems like the consensus is that it's a grounding issue, but I have probed around and my grounding seems to be fine. I'm uploading some pictures if someone can spot something I'm missing. Any help is appreciated. Thanks!
Cheers,
Matt
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I should probably clarify... I just finished the Crack yesterday. And I'm really excited and happy with it (except for this one issue obviously).
The buzzing is audible from the moment I turn the power on and seems to get a little louder as the tubes heat up and then planes off. After about 15-20 minutes there's some noticeable distortion in the left channel (as in a sort "blown speaker" kind of sound)... actually I can also hear it in the Right channel too.
Thanks again!
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voltages might help
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So, when finished assembling the kit yesterday... all the voltages checked out perfect.
Now here are voltage test results now:
1- OL (Rearmost LED goes dark. I.e. LED closer to A7 and A8)
2- OL
3- 0 Ohms
4- OL
5- OL (Frontmost LED goes dark)
6- 0 Ohms
*7- OL Here's where it's tricky: First I had OL. Then I had 2.9... then I noticed the LEDs were off and that the tubes were cold. I turned it on and I got OL again. I turned the light switch that controls the outlet off, but still had it plugged into the wall and got 3.04. I unplugged it altogether and get 2.95.
8- 0 Ohms
*9- Same as 7.
10- 0 Ohms
12- 0 Ohms
13- OL
14- 0 Ohms
20- 0 Ohms
22- 0 Ohms
*B3- Same as 7.
*B6- Same as 7.
RCA
Center Red- 98.9
Center Black- 103.2
Ground tab- 0 Ohms
Don't quite know what to make of it... thanks for the help!
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Another note... the distortion is definitely only occurring on the right channel now. But the buzz is on both and is independent of the volume.
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I don't know if this is relevant, but I just removed the headphone plug from the headphone jack and it is pretty hot. Is that normal?
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*Ahem* Excuse my noobiness... I just realized I posted a bunch resistance checks instead of voltages...
Anyways, here are the voltages:
1- 79
2- 178/9 (alternates)
3- 0
4- 178/9
5- 79
6- 0
7- 103/4
8- 0
9- 102
10- 0
They all seem to be in the indicated range, right?
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The juncture of the black wires on the headphone jack is not properly soldered (see in the photo how one wire is just floating in the middle of the terminal).
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Thank you Caucasian Blackplate!!! I look it over time and again and did not catch that... That solved it. Now it's quiet and the sound is incredibly good! Thanks a million!