Issue with left channel

nudas · 1726

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Offline nudas

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on: December 04, 2018, 11:31:38 AM
Hi, I recently assembled a 1.1 Crack. I have an issue with the left channel, there's a popping sound and some other background noise as well.
The right channel is totally silent by comparison and no pops or any noise.

My resistances:
1:*
2:*
3:0
4:*
5:*
6:0
7:3,045k
8:0
9:2,945k
10:0
B3:3,045k
B6:2,945k
R Center pin 98,6K
L Center pin 96,4k

Voltages:
1:79
2:177
3:0
4:177
5:89
6:0
7:110
8:0
9:122
10:0

Both LEDs light up.



Offline Paul Birkeland

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Reply #1 on: December 04, 2018, 01:18:26 PM
Your voltages look like a mostly working Crack.  The high voltage at terminal 9 may indicate a loose connection around the octal socket, and this is backed up by your description that the issue seems to be in the left channel.

If you'd like, you can post some photos here and we can point out potentially problematic joints, or you can just reheat all of them.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline nudas

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Reply #2 on: December 04, 2018, 11:46:47 PM
Thanks for the quick response
here are a few images
imgur.com/a/Ev7oAZp



Offline Paul Birkeland

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Reply #3 on: December 05, 2018, 04:56:04 AM
Yeah, I would just reheat the joints on the octal socket and the rear 5 lug strip.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline nudas

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Reply #4 on: December 05, 2018, 05:25:14 AM
Will try that next weekend and get back with the results.
Going away for work this week so I won't be able to try earlier.



Offline nudas

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Reply #5 on: December 14, 2018, 10:35:59 AM
It seems to have been an issue with the 6080 tube. Ordered a couple of spare 6080 tubes while away and popped one in when I got home today. And 9 is now showing a stable 113V and there's no issues at all with the left channel. Loving the sound from the Crack!