Has anybody played around with the Shure Level Loc Compressor circuit before? I has popped up on a few pro audio forums ( here & here ) and I was surprised to see that it runs on a 9V single supply.

I cut out just the compressor part from irfrench's 500-series version & built it up on the breadboard. Holy squish!!! This thing is like a tone trampoline. It clamps down HARD on the signal & has a much less transparent crunch to it than other FET compressors like the Rothwell Love Squeeze or Jon...

Hi anyone who have schematics of an outboard bass preamp??

No unusual ICs required! Uses just four cheap transistors! Most of you will have all of the parts in your junk boxes! SimpleCompressor.jpeg

The input impedance was originally designed to be about 10k as it was going to be used after another effect pedal. If you want to connect it first in line, before all your other toys, you'll need a higher input impedance: increase the two input bias resistors to 330k or 470k and reduce the input capacitor to 100n or even as low as 47n. Because the circuit...

I have eight different* cabsims laying on my desk. All diy work. And I have just made very short recording - for fun and for a comparison. Equipment used - guitar, POD HD500x, audio interface, Reaper. HD500x settings - all the effects off, Engl preamp on, cabsim off, looper ON). I've recorded short sample using PODs looper, and then played the sample through each cabsim into an audio interface. No further processing.

Here is the recording..

First sample - no cabsim, then cabsim1, cabsim2.....

So, I've been throwing around the idea of doing as Viva ANalog did and build up a pedal version of the fuzz section of the Acoustic 360 bass head (although I don't want the preamp stuff like JC did, I just want the fuzz). Here is the original schematic for the fuzz section:

And here is my redraw for clarity (used 2n2222 in place of the low gain 2nd stage transistor, 5088s everywhere else, not sure if these are appropriate replacements, but they are close in spec to the original part...

DISCLAIMER - PROGRAMMING IS NOT MY STRONGEST SKILL

Link to the article -

Benoit's article uses the C programming language to program the PIC and even though he step by steps it, I've run in to issues. The first time I tried to program the PIC the circuit and LED would turn on but not off, so I erased the PIC and started over. Now nothing happens and the only way I can get the relay to switch states is by connecting pins one and two of the 12F675.

Here is the layout I used -

I have...