total recall... signal at 7 but hi pitch squeel at 3/4 - no delay edit: solved

[mistermikev]

edit: solved


hello,
before you ask: yes, I prob bit off more than I can chew.  not a complete novice as I've built quite a bit but def finding this hard since I can't see the traces. 

I know I can't ask anyone to solve it for me... just sort of stuck and was hoping someone might give me an idea of what to check next.

i used the mouser cart for parts and seemed to have all I needed... did have some extra 24k but I may have ordered extra as it seems to be a common value. 
followed the build instructions and checked the dc jack, and regulator before I ever populated chips. 

what I've checked so far...
dbl checked that the mn3005 is oriented correctly to the solder mask.
-15.14 at regulator (-21.7 coming in)
-15.14 at pin 5 of ic6 -6.8 at pin 3/4
dbl checked all electro orientation
dbl checked d1 orientation
signal checked leading up to pin 7 of ic6... plenty of clean signal at pin 7 with level set to 40%

i have a couple of extra xvive mn3005 from smallbear, swapped out chips to check... sm result.  unless I got a couple of bad chips... but I'm not sure what the effect is when you have a bad chip... do you get a high pitched signal at pin 3/4?  i had initially worn a shock band while installing... ensured I grounded myself when swapping.

any help would be appreciated.

[Scruffie]

Can't tell you anything without seeing your full circuit voltages.

[mistermikev]

roger that... will do.

[mistermikev]

total recall

ic1: 4558
1 -7.57
2 -7.57
3 -7.52
4 -14.93
5 -7.47
6 -7.57
7 -7.59
8 0

ic2: ne571n
1 -13.9
2 -13.1
3 -13.1
4 -14.93
5 -13.1
6 -13.1
7 -3.86
8 -13.1
9 -13.94
10 -13.1
11 -13.1
12 -.5
13 -13.1
14 -8.93
15 -7.16
16 -13.1

ic3: 4558
1 -7.59
2 -7.59
3 -7.56
4 -14.94
5 -7.07
6 -7.16
7 -7.16
8 -.3

ic4: 4558
1 -7.59
2 -7.59
3 -7.56
4 -14.94
5 -5.34
6 -5.34
7 -5.36
8 -.3


ic5: 4558
1 -7.59
2 -7.59
3 -7.56
4 -14.94
5 -7.07
6 -7.16
7 -7.57
8 -.8

ic6: 3005
1 -.1
2 -7.61
3 -13.06
4 -13.06
5 -15.16
6 -7.6
7 -12.91
8 -13.06

ic7: 3005
1 -.1
2 -7.6
3 -6.93
4 -7.02
5 -15.16
6 -7.6
7 -5.35
8 -14.15

ic8: cd4047
1 -8.1
2 -7.06
3 -7.06
4 -0
5 -0
6 -0
7 -15.15
8 -15.15
9 -15.15
10 -7.61
11 -7.61
12 -15.15
13 -8.1
14 -.7

ic7: 3005
1 -???
2 -7.6
3 -6.58?
4 -7.02
5 -7.17
6 -7.18
7 -7.3
8 -.6

[mistermikev]

last one is ic9 not ic7 repeat and is a 4558... missed that

[mistermikev]

ic6 was out of whack from ic7 as I had adjusted the trimmer in a wide sweep trying to see if I could dial out the high pitch sqeel... adjusted to the middle and got

ic6: 3005
1 -.1
2 -7.61
3 -6.47
4 -6.47
5 -15.16
6 -7.6
7 -3.28
8 -13.14

[mistermikev]

once again proving that it is better to be lucky than skilled... I managed to figure it out on my own... thanks to those who considered helping me anyway.  Just hit it with a hammer a few times and voilla.  nice sounding build.  much smaller than my reg memory man.  probably could benefit from a second pass on the bias but good enough for today. 

[Scruffie]

When in doubt, give it a clout 

Well i'm glad you got it sorted in the mean time!

[mistermikev]

is there a restriction on new guys posting images?  got the img tags in there... is there something I'm missing?

[Scruffie]

Not that I know of, I could see the picture a minute ago.

Are you sure the link is okay?

[mistermikev]

posted a new one using google pics as other was yellowish... was able to post the new pic on facebook fine... but here: no luck. 

[mistermikev]

only photobucket works... call tech support!!!!!!!!!!!!!!!!

[Scruffie]

It's possibly a forum issue, the link might not be supported, try uploading it elsewhere.