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Home › Forums › Vintage EHX › Help Troubleshooting electric mistress v2
Hi All,
new to the forum. Just grabbed a really shiny V2 recently for a song and it’s not working. Bypasses fine, but nothing when engaged. I checked the switch and jack wiring, and all looks fine. D2 measured something like 3Mohm in both directions, so I am assuming it’s open and replaced it with a much larger 5w (all I had) 6.8V Zener. Other than that, the circuit looks stock.
On battery power, here are my voltages:
4558
1 2.851
2 2.855
3 2.824
4 0
5 2.824
6 2.858
7 2.858
8 12.76
SAD1024
1 0
2 2.852
3 3.418
4 0
5 12.76
6 0.102
7 12.76
8 0.549
9 12.76
10 0.549
11 12.76
12 0.102
13 0.001
14 3.418
15 2.851
16 0
LM741
1 0
2 6.63
3 6.63
4 0
5 0.006
6 15.15
7 18.5
8 0
4013
1 0.544
2 0.55
3 0
4 3.53
5 0
6 0.009
7 0
8 0
9 0.001
10 0
11 3.971
12 0.549
13 3.418
14 12.76
339
1 3.972
2 12.22
3 12.76
4 0.55
5 6.483
6 7.73
7 12.22
8 0.094
9 2.89
10 12.22
11 0.44
12 0
13 0.009
14 7.74
Any ideas? Thanks a million!
Very quick glance for the moment but the 4013 looks bad and your bias is off, try replacing the 4013, posting the new voltages you get and tweaking the bias trimmer.
I’ll take a more thorough look in about a week.