Re: true bypass loop switchers POP



RC_Moonpie wrote:
On Mon, 08 Oct 2007 14:19:31 -0000, RichCI <richci@xxxxxxxxx> wrote:

On Oct 8, 10:15 am, RC_Moonpie <rc_moonp...@xxxxxxxxxxx> wrote:
question for anybody who uses the true bypass loop switchers for
older pedal effects

these things seem to fine for using with time based effects, chorus,
delay, flange, etc

but put anything in the loop that boosts the signal, like a dirt
box, and suddenly I get a loud POP when i hit the loop button to
turn it on

anybody else experience this? If so, is there a way to fix it or
prevent it?

thanks



This doesn't directly address the issue with the effects loop and is
specific about wahs, but here is some info from the FAQ section at
Analogman:

"Popping sound when effect is switched"
"My effect with DPDT switch makes a "popping" sound when I switch it
in and out. How can I quiet this down?"

"This is caused by a change in levels between the effect BYPASS and
ON modes. According to Geoffrey Teese (Teese Real McCoy wahs- the
best wahs available) You can fix this by adding a 1 MegaOhm tie-down
resistor on the circuit board. You need to add it between the INPUT
and ground. Do not add it at the jacks, but on the circuit board. On
the VOX V-847 this can be done on the back of the circuit board on
the multi-pin connector. On the newest crybaby wah you should not
have this problem as they use a buffer which even does away with the
need for the true bypass mod."

"Note that most wahs are microphonic and some of the popping is
unavoidable. The noise is the sound of the mechanical switch
clicking, amplified by the inductor on the circuit board. Try
tapping on the board with a pen to see how microphonic yours is (the
wah should be ON)."


http://www.analogman.com/faq.htm#bypass


thanks

i'll never be able to do that tho.

but it was nice to see that i'm not the only person who noticed it

According to Mike Fuller, it's something to do with capacitance, and should
go away if you repeatedly hit the switch. There is a fix ... the resistor
thing sounds familiar. I don't think it's a microphonic thing at all ..it's
electrical (assuming we're talking about the same thing). Maybe the wah fix
has to be on the board, but I don't think that's universally true. There
have been threads about this stuff in alt.guitar.effects.

Don


.

Relevant Pages

  • Re: true bypass loop switchers POP
    ... and suddenly I get a loud POP when i hit the loop button to turn it on ... specific about wahs, but here is some info from the FAQ section at ... "My effect with DPDT switch makes a "popping" sound when I switch it ... Do not add it at the jacks, but on the circuit board. ...
    (alt.guitar)
  • Re: true bypass loop switchers POP
    ... and suddenly I get a loud POP when i hit the loop button to turn it on ... specific about wahs, but here is some info from the FAQ section at ... "My effect with DPDT switch makes a "popping" sound when I switch it ... Do not add it at the jacks, but on the circuit board. ...
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