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I retested the Qs with the PRE knob all the way turned down and the only voltages that changed were on the collector of Q6 and base and emitter of Q7 so thinking that area is a good place to start. Also the build docs and silk screen have R37 and 38 swapped. Dont think it matters as its just the...

So pedal is working but if I turn the PRE knob past about 11 o'clock it starts cutting out like its not biased correctly. I cant imagine that a pedal would be designed to have that much of a dead spot. Checked all resistors and caps and they are all correct. Took voltage readings with the volume...

Did you ever figure this out? Im having the same issue.

Hey all, got some questions on the Pendulum tremolo circuit I was hoping to get some help understanding a bit better. Question 1, does the separation in frequency between the HPF and LPF create the trem effect? I play bass and it just feels like the effect trails off as I go lower on the neck to...

Finally getting over the tree line where Im at

I used these on mine and had no issues https://www.mouser.com/ProductDetail/667-ECE-A1EKA470I

Well, turns out when I said I have never needed to use the frequency setting on my meter I should have gave the manual a quick peak. Turns out my Fluke doesn't read Hz through the probes, it reads it through the amp clamp. 🫠 Got the cheapest meter I could find off amazon and yeah ever thing...

So I got the pedal built and it seems to be working just fine, never had a flanger but sounds good to me. Went to check what the Hz was since Ive seen on here that should be set to 40 kHz but I get 0. I have never had a need to use the frequency setting on my meter but seems pretty straight...

Thanks everyone for the help and suggestions but Im going to have to shelf this one for a while. I just cant get this one to work. I have reflowed all solder joints insuring it flowed through the board. Rechecked every value, swapped out a cap that was not right (thanks Robert) pulled Q8 and Q9...

Q8-C1.8v B2.38v E3v Q9-C8.72v B4.62v E3.98v I measured R43 with my meter and installed in the board it measures 2.7k so I pulled it out thinking maybe it’s bad and it measured the proper 82k. With no resistor in that spot at all it still measures 2.7k between pin 1 and 2 so not sure if that is...

Quick update. Swapped out the 22nf for a 22pf cap and still nothing. I was able to audio trace down to pin 2 of R42 but nothing passes through that resistor. When I probe pin 1 its dead silence like I'm going straight to ground. I have no signal on either Q8 or Q9.

OMG, yeah that will do it lol. Ill swap it when I get home and let you guys know how it went. Thanks for all the help!!

Yep, just ran out of my smaller 25v ones so the bigger green one is a 50v

Yes after the master pot the signal starts to get real bad and by the time it hits the IC its super low and what I can hear is really distorted. When I probe the output it is dead quiet like the signal is going to ground somewhere. I did reflow pretty much everything at this point, checked that...

I am really lost with this one. Checked the Master pot and it seem fine. There is a bit of an oddity with the "PRE" A10k pot. Between pin 1 and 3 I get 10k~ turned all the way to one direction but when I turn it the other way it drops to 5k. Thought that might be the issue so de-soldered it and...

Thanks Ill check tonight when I get home. A bad pot would be nice, I really took my time with this one since there are so many components I didn't want to have to go through this lol. I did check the IC. 4.32v on pins 1, 2, 3, 5, 6 and 7. 1.2mv on pin 4 and 8.73v on pin 8

Need some help on this one. Built the pastel preamp but not getting any output signal. Went through and checked every resistor, swapped IC's, and reflowed solder on a few points that looked a little sus. , but still nothing. Have an audio probe and have good strong signal up to R31, but after...

Not an expert by any means but wondering about the trim pot in parallel with R4? Could try pulling R4 and swapping the trimmer for a 50k. The "correct" bias is 1/2 supply voltage, or 4.5 but set it to what sounds good to you. If you haven't seen it JHS has an excellent playlist on breadboarding...

Update got it working. Turns out it was just a bad soldier job on one of the sockets. Put some more in and fired right back up. Sounds so good on my bass. :)

Thanks for the advice, the grounds are connected through the power I/O module. Ill be out of town for a few weeks but when I get back I'm going to try a new chip. Ill take some voltage readings tonight from the chips and Q1-5, does anyone have a list of what they should be? I also made an audio...