Question on Implementing a Volume Cut Switch

[TyPierce]

New guy with what's likely an old question.  I did a search and came up with some possibilities, but nothing specific so I thought I'd throw this out there to make sure my head's in the right place.

I want to put a 2-way switch on a fuzz box to cut the input volume, basically accomplishing the same thing as turning down the guitar's volume knob, but since it's in-effect I can set the pedal for unity gain and stomp it on/off in the middle of songs without reaching for a knob.

I'm thinking I could just wire a 100k-ish resistor in series on one output of the switch before the input signal hits the actual circuit, which would roughly correlate to having the guitar's volume turned down about half (assuming a 250k pot, that is).

Am I close on this, or way off the mark?  I found this thread where Mark Hammer is doing something a bit similar to a TSF circuit - http://www.diystompboxes.com/smfforum/index.php?topic=90760.0 but since the implementation isn't quite apples/apples I thought I'd ask.

Also, am I at risk of losing treble or tone with this method?  If so, should I wire a cap in parallel with the resistor to act as a "treble bleed" for the volume cut?

Thanks in advance for the info!

[petemoore]

  Here's hows I do that kind of thing:
   Wire testclips to a pot to make VR, variable resistance.
  Put the pot in, adjust to taste, measure the R value that makes the right effect, find fixed resistor..put that fixed R value in where the pot was.
   

[TyPierce]

Thanks for the info, Pete.  That'll definitely work for figuring out the best value.

As far as implementing it on a switch, I should be able to use a SPST switch off the input that throws signal through that value to ground when the switch is closed, yes?

[ashcat_lt]

Resistance in series with passive pickups will not affect much volume drop until the resistance gets close that of the input resistor.  It'll mostly just suck tone.

You need a voltage divider, which requires two resistors.

There will still be some loss of treble for the same reason that you lose treble when you turn down at the guitar.  Some people like this, even rely upon it.  If you're not one of those people, treble bleed cap can help.

[TyPierce]

Seems like it makes sense.

So going off what you're saying, I should wire two equal resistors off the switch - one that splits signal off to ground, and one that goes on to the rest of the circuit with a treble bleed cap in parallel?

Also, I assume this should come after the first input resistor?

Thanks again for the info...