emi/rfi filtering for wah

[jlo]

I know that Teese Wahs have a passive emi/rfi filter.  Has anyone reverse engineered this?  Does anyone know if a voxv847 could be modded to have a filter placed?   Thanks for your comments

jlo

[Paul Marossy]

They do?! That seems like it would be hard to accomplish since the inductor by nature is susceptible to EMI. I would be interested to see how that could be done, too.

[jonathan perez]

ive got teese wahs...and they all have ferrite beads, and a aluminum cap over the inductor...but nothing we dont already really know about.

[jonathan perez]

unless youre playing your wah right over a power supply, i dont think emi/rfi has ever/will ever be a problem.

try NOT using carbon comp resistors.

try NOT using old unpotted inductors.

[Paul Marossy]

unless youre playing your wah right over a power supply, i dont think emi/rfi has ever/will ever be a problem.

I have found that inductor based wahs are sensitive to things with motors - like a fan for example. Distance between the source of EMI and the wah seems to be the only way to deal with something like that.

[cd]

ive got teese wahs...and they all have ferrite beads, and a aluminum cap over the inductor...but nothing we dont already really know about.

The cap is likely not aluminum, but mu metal.

[jonathan perez]

any more corrections?! 

yeah, thats what i meant.

[jimbob]

I know that Teese Wahs have a passive emi/rfi filter.  Has anyone reverse engineered this?  Doe

Wow- last time someone mentioned the 2 words Teese and reverse engineerin the same sentence Teese responded angrily bla bla bla. I see his point but like the rest Im always in search of new and better way of improving my wah.

[cd]

any more corrections?! 

yeah, thats what i meant.

  Yeah, I figured but someone else reading might cover their wah inductor/board with tinfoil and wonder why it made no difference.

The usual pf range RF suppression caps can be used as well - from B to C on the transistors, and on the input (1k resistor in series with the input, with pf range cap to ground after 1k).

[jonathan perez]

any more corrections?! 

yeah, thats what i meant.

  Yeah, I figured but someone else reading might cover their wah inductor/board with tinfoil and wonder why it made no difference.

tell that to the guy (that everyone knows) who puts tinfoil on his antenna to get better reception...

[Geoffrey Teese]

I know that Teese Wahs have a passive emi/rfi filter.  Has anyone reverse engineered this?  Doe

Wow- last time someone mentioned the 2 words Teese and reverse engineerin the same sentence Teese responded angrily bla bla bla. I see his point but like the rest Im always in search of new and better way of improving my wah.

I'm still here.

[Ed G.]

I know that Teese Wahs have a passive emi/rfi filter.  Has anyone reverse engineered this?  Doe

Wow- last time someone mentioned the 2 words Teese and reverse engineerin the same sentence Teese responded angrily bla bla bla. I see his point but like the rest Im always in search of new and better way of improving my wah.

I'm still here.

Great! I think everyone here would invite you to participate, just like Dave Barber and Zach Vex, among the other effects builders who post here. You'd be surprised how a little goodwill goes a long way.

[Geoffrey Teese]

Hi,

I don't really have anything to add to this.  I was a part of a similar discussion a year or so ago over at TGP, as some, if not most, of you know.  EMI is a bitch, plain and simple.  I'm hoping one of you bright guys/gals can come up with a realistic, and repeatable, solution to the problem.

Man, I don't know about being helpful creating goodwill.  A lot of crap gets thrown at me and I generally stay off BBS. 

I just thought popping in, after the prior post, would be amusing.  Guess I should check my humour quotient.

Peace, Love, and Wah,
Geoffrey

[Paul Marossy]

EMI is a bitch, plain and simple.

Yep. That's the nature of the beast. 

Man, I don't know about being helpful creating goodwill.  A lot of crap gets thrown at me and I generally stay off BBS.

That's just a shame, isn't it? The forum sharks always screw it up for everyone else. 

Peace, Love, and Wah

Yeah, back at ya. 

[jimbob]

Guess I should check my humour quotient.

I thought it was funny.    Good to see ya back. I wonder when the next time we will see ya here.