Neovibe: Touching C20 and C19 Top goes away buzzz

[richon]

Hi,

i have a excelente NEOVIBE but it has a BUZZ that increases and decreases as the BULB/LAMP turns on and off of the LFO. It sounds SPECTACULAR, but the buzz is something sad.

so: after moding some stuff (all 2n3904 except driver: MPSA18 (which is exact like 2n5088))...

i realize that touching C20 and C19 Top goes away buzzz. By "top" I meand the upper part of the Electrolitic capacitor.


where a little metal is..... seems like there is some static or something going on...

but as soon as I touch them (only finger) the buzz goes away and the sound stays..  and after i lift my finger the buzz comes back... 

[richon]

NEVERMIND!!!   i found the solution...

1.- my 18V transformer needs better insulation
2.- or make it an external PT.

by touching this and that it hits me that moving the PT away or turning it improves the sound (decreasing the BUZZ)... so everything is fixed now....

soon to post some CLIPs

[R.G.]

Good debugging! Congratulations!