Help needed for an Folkurban Octup! from Tonepad

[arma61]

Hi m8

it's still in the bin! I got me a Peavey Revolution 112 amp the other day, so I have to "give it" some of my time!! LOL

I'd try anyway with a battery just to be sure the noise is 100% coming from the circuit.

Ciao
Armando

[Mugshot]

ok, it turns out the noise is indeed caused by my PSU after all 



i drilled another PCB and transferred all the components from the first PCB and drilled holes too for the 100uF and 0.1uF caps to help me with the humming. again the circuit worked without issues (i used trimmers instead of pots since i already have an idea of how much resistance i need for the circuit). but there is still some hum in the circuit. i used a battery as suggested, and there was no noise whatsoever, therefore my regulated PSU is the culprit, but it's odd since i dont have noise issues with the other pedals powered by the PSU.

so anyway it still sits last in my chain, powered by PSU, and yes it does seem clean. when used after a Rat it's like a treble booster (since the octaves are given more focus, it does seem like a treble booster). my impression is that Tim's Octup is for ringing notes and solos, but not for chord work as it becomes an ugly fuzz. but after distortion, this one's quite good! thanks to TIm for this project and to TOnepad!

[rousejeremy]

I just breadboarded the octup. It's working fine but there's a considerable gain loss. Anyone else encountered this?

[Mugshot]

I just breadboarded the octup. It's working fine but there's a considerable gain loss. Anyone else encountered this?

ahm, you can adjust the volume pot/trimmer  i dont know though if that helps.


------------------------

regarding noise issues, i discovered that adding a 100ohm resistor in series to the the power supply killed (somewhat) the ugly hum i had.

[rousejeremy]

I cranked everything and the gain was well below unity. This seems to be quite common with the simpler octave circuits I've tried.

[Mugshot]

I cranked everything and the gain was well below unity. This seems to be quite common with the simpler octave circuits I've tried.

that's weird, because on mine i can adjust the output way above the original volume.

[rousejeremy]

Just breadboarded it again. It's louder this time, but there's almost no octave effect. I've read some posts on this and it seems it's just an experimental circuit.

[Mugshot]

Just breadboarded it again. It's louder this time, but there's almost no octave effect. I've read some posts on this and it seems it's just an experimental circuit.

it has been said that it was just an experiment. i dont know, but mine seems to be working. the 2 trimmers afaik adjust output and octave prominence. crank one trimmer full CW and the other about 3 notches from ground. see if that helps.