Hi all,
So I've been wrestling with the L5 preamp for a while and I have finally got it about 90% working, but the compressor is behaving super strangely. It sounds super fuzzed out when it engages and is highly sensitive. It will also sometimes trigger even when the switch is off. I've checked all the voltages and only found two components out of spec with expected values.
IC11
1 - 0V
2 - 0V
3 - 0V
4 - -15.1V
5 - -14.9V
6 - -0.06V (should be 0.23V)
7 - 14.74V
8 - 0V
Q1
D - 14.97V (expected)
S - 0.05V (should be 0.02V)
G - -0.06V (should be -0.02)
I originally had bad 3080 chips in IC10 and IC11, but did replace them with chips from SmallBear a while ago. IC10 gives all the correct voltages so I don't think the problem is in the 3080 but I'm not sure where to look at this point. I've also tried switching out Q1, 2 and 3 (currently using a surface-mount 5457 with an adapter on Q1). I appreciate any insight anyone can offer on this one
Thanks!
So I've been wrestling with the L5 preamp for a while and I have finally got it about 90% working, but the compressor is behaving super strangely. It sounds super fuzzed out when it engages and is highly sensitive. It will also sometimes trigger even when the switch is off. I've checked all the voltages and only found two components out of spec with expected values.
IC11
1 - 0V
2 - 0V
3 - 0V
4 - -15.1V
5 - -14.9V
6 - -0.06V (should be 0.23V)
7 - 14.74V
8 - 0V
Q1
D - 14.97V (expected)
S - 0.05V (should be 0.02V)
G - -0.06V (should be -0.02)
I originally had bad 3080 chips in IC10 and IC11, but did replace them with chips from SmallBear a while ago. IC10 gives all the correct voltages so I don't think the problem is in the 3080 but I'm not sure where to look at this point. I've also tried switching out Q1, 2 and 3 (currently using a surface-mount 5457 with an adapter on Q1). I appreciate any insight anyone can offer on this one
Thanks!