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Crack;Bottlehead OTL
Jun 20, 2013 at 12:30 PM Post #1,891 of 12,335
Quote:
dark helmet said:
No having any luck at the Bottlehead forum so I'll ask here.  I just installed the Goldpoint MiniV stereo Attenuator in My Bottlehead Crack.  In the process of doing so I had to remove some components and when I went to do my voltage check I noticed that at terminal 6 and 10 it measures 40V, when it should measure 0V.
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A response time of ~24 hours is pretty reasonable for a tech support forum, 6 hours is asking a little much.
 
Jun 20, 2013 at 7:48 PM Post #1,892 of 12,335
Hey guys, I just encountered my first problem with the Crack. It was fine a week ago after I had finished it; played beautiful sound with no background noise. Now a prominent crackling sound with a slight buzz appears in the left channel and very faintly in the right channel. The noise stays for 15 seconds and then goes away. Sometimes it returns a minute or two later and other times it comes back a day later. The trouble shoot say this may mean a bad tube. Which tube would I need to replace? Do you guys have any other suggestions where to check for a cold solder joint or something else like that? Thanks for any help!
 
Jun 20, 2013 at 8:02 PM Post #1,893 of 12,335
Quote:
jmanofisrael said:
Hey guys, I just encountered my first problem with the Crack. It was fine a week ago after I had finished it; played beautiful sound with no background noise. Now a prominent crackling sound with a slight buzz appears in the left channel and very faintly in the right channel. The noise stays for 15 seconds and then goes away. Sometimes it returns a minute or two later and other times it comes back a day later. The trouble shoot say this may mean a bad tube. Which tube would I need to replace? Do you guys have any other suggestions where to check for a cold solder joint or something else like that? Thanks for any help!
Click to expand...

To add to this. Sometimes I find that turning the amp off for 5 minutes and then back on is all that is needed to stop this sound. Thanks again for any help!
 
Jun 20, 2013 at 10:14 PM Post #1,895 of 12,335
audiowize said:
A response time of ~24 hours is pretty reasonable for a tech support forum, 6 hours is asking a little much.
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I just thought it was a good idea to post elsewhere to see if I could get a response quicker. I wasn't trolling for you on this forum. Typically if I need info or answers i always get it faster here than any other forum. Sorry for the trouble.
 
Jun 20, 2013 at 10:18 PM Post #1,896 of 12,335
Quote:
jmanofisrael said:
To add to this. Sometimes I find that turning the amp off for 5 minutes and then back on is all that is needed to stop this sound. Thanks again for any help!
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Any other details you can add? What is your source? And does it happen even if you try a different audio input (e.g. MP3 player, vs. computer, vs. cd player)?
 
Jun 20, 2013 at 10:43 PM Post #1,897 of 12,335
I haven't tried another input. I am running from a MacBook>ODAC>Bottlehead. I initially had problems with my USB port on my MacBook. I will see if this trend continues if I leave the source unplugged. I will also try switching the source.
 
Jun 21, 2013 at 12:58 AM Post #1,901 of 12,335
I was between the odac and the HRT music streamer ii. They are both comparable, I just managed to find the odac on head-fi used so went with that option. I really am loving it with the crack besides the little hiccup I have recently encountered.
 
Jun 21, 2013 at 5:11 AM Post #1,904 of 12,335
Quote:
jmanofisrael said:
Hey guys, I just encountered my first problem with the Crack. It was fine a week ago after I had finished it; played beautiful sound with no background noise. Now a prominent crackling sound with a slight buzz appears in the left channel and very faintly in the right channel. The noise stays for 15 seconds and then goes away. Sometimes it returns a minute or two later and other times it comes back a day later. The trouble shoot say this may mean a bad tube. Which tube would I need to replace? Do you guys have any other suggestions where to check for a cold solder joint or something else like that? Thanks for any help!
Click to expand...

 
I had a similar problem. The Crack buzzed and popped when warm, only after a couple of minutes, in the left channel. It disappeared when I changed the 6080 tube (the big one). You can also try the chopstick test to look for cold solder joints : try pocking all the connections inside with a wooden stick (be careful doing this). The buzz and popping should get worse when you hit the part with a bad joint. And try pocking the tubes to see which one is bad.
 
Jun 23, 2013 at 1:11 AM Post #1,905 of 12,335
So.. I had a couple of tubes arrive today... an E80CC & a 12BH7.  Rolled them into the Crack a few hours ago (w/ the 5998 in the output position).  Wow.  I'll keep it short for now:
 
I don't think I can go back to a 12AU7 tube.. any 12AU7, actually.
 
More later..
 
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