Search found 10 matches

by bxc1986
Wed Jan 25, 2017 7:43 am
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

frank wrote:An unbroken pour is best.
I've attached a picture where I have vias tying the ground pins from the FV-1 to the ground plane, would this be ok to do?

My hope is to run all the leads on the top layer so the bottom layer could be just the ground pour

https://goo.gl/photos/qgjPzXNSqn7rppY29
by bxc1986
Fri Jan 20, 2017 6:17 am
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

OK, I see a number of issues: 1. You are not really using a ground plane, all the ground connections should tie directly down to the ground plane. For example you have pin 4 tied to 25 and 24, they should not be tied like that they should all connect directly down to the plane 2. Lots of breaks in ...
by bxc1986
Sat Jan 14, 2017 9:12 am
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

Please post the PCB, ground loops and broken return paths can cause lots of problems. here are a few of the pcb, some before and after ratsnest so you can see the leads more clearly https://goo.gl/photos/XdUBvHUhH4dDitTs6 https://goo.gl/photos/ULDywf7k4fAfP33S7 https://goo.gl/photos/FMhButGn7PhK4XZ...
by bxc1986
Sat Jan 07, 2017 5:18 pm
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

It is hard to read the schematic but is that a 5V regulator you are using? It looks like you are running 2 diodes in series from the power jack? it says 5v because its to same to-92 package in my eagle cad library but in the build its a 3v regulator, and yes those are diodes in series from the powe...
by bxc1986
Wed Nov 30, 2016 4:34 pm
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

Out of interest, after you plug in the external power and experience this distortion. What happens if you then change effect to another one through the S0-S2 pins. Does the next effect also have the same distortion or does sound correct.? it still distorts even when i change the program, i thought ...
by bxc1986
Tue Sep 13, 2016 11:32 am
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

I found the issue! it was a crappy 3.3v regulator from China, I ordered some better quality regulators and the problem is gone! thanks for all your suggestions!
by bxc1986
Thu Sep 08, 2016 12:27 pm
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

Every crystal is a little different so if the manufacturer doesn't have a suggested circuit then try the following: 1. Try 15pf on both legs 2. Try 33pf on one leg 3. Try 33pf on both legs 4. Try a series resistor (1K ohm) between crystal and X2 5. Try a parallel resistor (100K) across the crystal ...
by bxc1986
Thu Sep 08, 2016 6:09 am
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

Try a 33p cap with the oscillator it may or may not cure the issue, are you sure it is the crystal causing the problem in the first place as it could be something else. I'm pretty sure it's the crystal I'm not 100% but all the research of done into the matter points to the crystal, I'll try adding ...
by bxc1986
Wed Sep 07, 2016 8:59 pm
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

I contacted the manufacturer and he just spouted a bunch of theory about pierce or colpitts oscillators without ever really telling me what I needed for the fv-1 application, is there a crystal that you recommend and know to be reliable with the 15pf cap as called for in the datasheet that I can jus...
by bxc1986
Wed Sep 07, 2016 7:36 am
Forum: FV-1 hardware questions
Topic: reverb distortion
Replies: 20
Views: 18970

reverb distortion

so I've made 3 reverb pedals that did not have this issue, but the last 2 I've built have, if you plug in a power supply while powered it causes distortion in the reverb, if you plug in the power cable then add power it's completely fine(plugging dc plug into pedal before plugging into the wall), so...