wires to shield with LFO circuit

[darron]

hey. finished my PCB design for a tremolo. luckily the PCB is very quite and doesn't let noise click across from the LFO. i've played around and found which are the nosiest wires to offboard pots etc. for the LFO that should be shielded from my audio pot and pcb.

obviously i will shield the wires for the level pot. should i also shield the LFO wires that emit the noise? i would just hook up the wire's shielding to its pot/switch which has good continuity to ground. i'm thinking that they might be squished closer to the pcb once i box it up, and might move around unreliably making noise in places.

i'm not sure if it's possible to add noise to the ground too? i should imagine not.

i think there might be some simple words of wisdom from more experienced people, and i'd love to hear them.

thanks (:

darron

[foxfire]

i've been playing around with your idea for the last couple of days and ended up boxing a rough version last night. i had an extra LPB laying around so i put the ldr at the output of the LPB. i did a pretty quick and crappy job of it but, it still seems to be pretty quiet. i just used whatever scrap wire i had on hand. now was getting a tick/tap so i put a 10uF cap from pin 5 to ground to get rid of it or at least most of it. the 10uF from pin 7 to ground only changed the sound from a tick to more of a tap. anyway i tested it a bit on my amp at my shop and it sounded alright but, there is something about the electricity at my shop that makes all my amps sound bad so i can't say that it's done.

[gez]

If I get tick when a board goes into an enclosure, I reroute the audio wires/shorten LFO wires and it usually cures the problem.  Failing that, I'd just shield the (audio) input wire and go from there if that doesn't solve the problem.

[darron]

If I get tick when a board goes into an enclosure, I reroute the audio wires/shorten LFO wires and it usually cures the problem.  Failing that, I'd just shield the (audio) input wire and go from there if that doesn't solve the problem.

yeah. i'm keeping everything short, and shielding the audio wires should keep it quiet, but i'm happy to put in the time and was wondering if shielding the other wires can make it that little bit better, or it it' sactually possible to make it worse.






firefox. i know what you mean about the tick becoming a small pop. that trick used to work for me for some reason until a point. i found that working on breadboard there's ofren a tick, until i grounded the bottom plate of the breadboard and or some reason that cured everything (unless you have LFO right beside audio). i'm hoping that once things get into enclosures it cleans it up like this too. maybe not.

[foxfire]

If I get tick when a board goes into an enclosure, I reroute the audio wires/shorten LFO wires and it usually cures the problem.  Failing that, I'd just shield the (audio) input wire and go from there if that doesn't solve the problem.

yeah. i'm keeping everything short, and shielding the audio wires should keep it quiet, but i'm happy to put in the time and was wondering if shielding the other wires can make it that little bit better, or it it' actually possible to make it worse.






firefox. i know what you mean about the tick becoming a small pop. that trick used to work for me for some reason until a point. i found that working on breadboard there's ofren a tick, until i grounded the bottom plate of the breadboard and or some reason that cured everything (unless you have LFO right beside audio). i'm hoping that once things get into enclosures it cleans it up like this too. maybe not.

yeah, that's why i decided i had to get it in to an enclosure. i have been trying a few different simple lfo's on the breadboard and began to wonder how much time i was waisting trying to get the tick. since it could be caused by the breadboard itself.