resistor on input jack question

[Mr_X]

im currently building a scrambler box and the pictures ive seen have a resistor soldered onto the input.
my question is
do i need the resistor and if so where does it attach to? im including a picture of what i am talking about.
http://fuzzcentral.tripod.com/scrambler/scrambler2.jpg

[chunks717]

I almost totally sure this is for input Z, and pop repression.....
I didnt look, but it may be 1M resistor, and whatever it is must go from signal to ground, as those tend to be the only things on an input jack....this resisor can be on the circuit board, but is sometimes put on the jack to 'save space'.

[Mr_X]

Makes sense TY for the Rapid Response

TY TY TY
Rob
X

[Alex C]

If that resistor is on the jack as a pulldown resistor, it's not in the circuit when the switch is on "bypass."

The signal lugs on the box are not tied to the effect circuit when a pedal is bypassed. The whole point of pulldown resistors is to pull the input/output capacitors to ground when the effect is bypassed, and they can't do that if they're permanently mounted on the in/out jacks. They have to be permanently attached from the outside cap of the effect circuit input and output to ground to be effective.
-R.G.

[petemoore]

  Yupp...gotta watch putting resistors on jacks, say, if you have lots of jacks and that ='s lots of resistors, say you have 4 x 1meg [if you add up the resistors from SP to ground] now your'e at 250k, and that can start to load the signal down, and signal loading would be the only 'feature' provided.