Hello!
I've been trying to build a
janglebox compressor for the last few days, but I'm afraid I've hit a wall.
I've got no output from the effect. The inputs of the chip both get signal, but there is no output on pin 6. I am using a LM13700 in a
daughterboard , and have tried 4 different chips with no success. If I put a jumper between one of the inputs (pin 2 or 3) and the output (pin6) then I get a signal coming out of the effect, however it isn't compressed or anything.
I replaced the trim pot with two 470 ohm resisters, and had to put a few in parallel to get the right values.
This is really stumping me, I've tried everything that I could think of and none of it worked. Any advice or anything would be really appreciated.
VoltagesP1: NC
P2: 2.94
P3: 2.94
P4: 0
P5: 0
P6: 2.95
P7: 9.17
P9: NC
Q1: E - 2.07 B - 2.44 C - 9.17
Q2: E - 2.34 B - 2.83 C - 6.80
Q3 : E - 0 B - 0 C 8.38
Q4: E - 0 B -0 C - 8.36
Q5: E - 8.73 B - 8.38 C - 9.17
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That picture keeps on rotating 90 degrees for some reason, sorry!
Thank you!