owlexifry
Well-known member
ohhhh you’re good then.
they jacks will ground themselves to the enclosure, just make sure there isn’t too much paint around the hole/mount area
ohhhh you’re good then.
the gain knob, and generally when it's over I'd say 80%. the pitch of the oscillation changes as the knob is turned. oddly when I put my finger on the bass pot it pretty much goes away. the residual noise is likely a mix of the absurd amount of gain and the crappy wiring in my apartment. I use an isp hum eliminator and decimator to combat that.At what knob settings does oscillation occur? What influences it? Gain, Mid, Presence, guitar Vol knob?
Did you clean the board after soldering?
Have you tried with other ICs? 5448 instead of 072?
Putting one together once I get some last minuet components by the end of the week, Did you ever get the oscillation sorted out?the gain knob, and generally when it's over I'd say 80%. the pitch of the oscillation changes as the knob is turned. oddly when I put my finger on the bass pot it pretty much goes away. the residual noise is likely a mix of the absurd amount of gain and the crappy wiring in my apartment. I use an isp hum eliminator and decimator to combat that.
I have not tried different IC's. that's worth a shot for sure.
Hello! New to this forum. Names Greg. I’m curious about this build and am looking into sourcing parts to build one for myself. Just wanted to verify that the presence pot is 25k reverse audio? If that’s the case does anyone have a source for this?
Thanks!
If that’s the case does anyone have a source for this?
Welcome! I ordered mine from Stompboxparts. If you're in the US, they have reasonable shipping.Hello! New to this forum. Names Greg. I’m curious about this build and am looking into sourcing parts to build one for myself. Just wanted to verify that the presence pot is 25k reverse audio? If that’s the case does anyone have a source for this?
Thanks!
got side tracked with other projects. just got it boxed up, and now that it's grounded in the case, the oscillation is basically gone. if i crank the gain AND the mids, it will make a funny honk noise when i turn off my gate. but under normal use cases, the problem i was having before is effectively solved. i test everything extensively before i go drilling expensive enclosures. this would be the second time i reported a problem and it turned out to be grounding because it wasn't boxed yet. shout out to Robert for sorting that out for me both times. what a guyPutting one together once I get some last minuet components by the end of the week, Did you ever get the oscillation sorted out?
the fix is building it properly.Hi, I have boxes mine up and it still suffers from oscillation at high gain levels. I am guessing there is not a fix for this yet?
Double check everything. If you can use a short ribbon cable and breakout to the footswitch just to keep leads long. Do what everyone says and route wires along the side above and away from the PCB and it will work perfectly.Hi, I have boxes mine up and it still suffers from oscillation at high gain levels. I am guessing there is not a fix for this yet?
the fix is building it properly.
there’s enough information available on this thread and others (including mine) on how to do that.
if you want some real help, it might be good for you to post your own troubleshooting thread (this is someone else's build report) and attach close, in-focus pictures of your build, and it might be easier to identify potential issues and/or give you some tips
Thanks ,the fix is building it properly.
there’s enough information available on this thread and others (including mine) on how to do that.
if you want some real help, it might be good for you to post your own troubleshooting thread (this is someone else's build report) and attach close, in-focus pictures of your build, and it might be easier to identify potential issues and/or give you some tips.
Will do ,great feedback ....the fix is building it properly.
there’s enough information available on this thread and others (including mine) on how to do that.
if you want some real help, it might be good for you to post your own troubleshooting thread (this is someone else's build report) and attach close, in-focus pictures of your build, and it might be easier to identify potential issues and/or give you some tips.
This shouldn't be happening. I just pulled out the prototype to confirm, it doesn't oscillate at any setting of the controls.
Try routing your Input / Output wires further away from the PCB. When I route the input wire between the capacitors like you have in your pic I do get oscillation.
The oscillation has nothing to do with the input/output cable whether you use shielded one. In my experience was the oscillation was cause by the feedback loop resistor on the gain section. Just make sure the resistor (R10= 1meg) is good and properly soldered. This also goes to the 100pf capacitor that goes with it.Nice build!
I know I saw someone in a Facebook pedal group with a hand built SLO pedal, judging from the control layout, I’m guessing it was a PPCB board as well.
As someone mentioned elsewhere, wonder if using shielded wires from the switch to jacks would help cut the oscillations?