Pulldown Resistor?

[modsquad]

My understanding is that a pulldown resistor can be placed before the first cap in the circuit and ground and/or after the last cap and ground in the circuit.   Does that mean that I could conceivably solder them to the lugs on the input and output jacks?

[The Tone God]

Not if you are going to use a bypass switch as the resistors have to be connected to the caps even when bypassed.

Andrew

[MartyMart]

That's how they wire them in amps, as there's no "bypass" on an amp, thay can be on the jack socket

MM.

[Papa_lazerous]

That's how they wire them in amps, as there's no "bypass" on an amp, thay can be on the jack socket

MM.

This is true, but on a stomp box if you want TB then you dont want the pull down resistors there as you will get "tone sucking" put the resistors on board simple

[The Tone God]

This is true, but on a stomp box if you want TB then you dont want the pull down resistors there as you will get "tone sucking" put the resistors on board simple

Tone sucking is one issue. The bigger issue is there will no longer be pop reduction which is the main reason why most effects have pulldown resistors. The resistor has to be connected to the cap when the effect is bypassed to drain away any residual DC. If you switch the resistor with the effect bypass switch the resistor will not have enough time to drain away the DC thus a potential for popping.

Andrew

[Papa_lazerous]

That would alo be a very good comment

[modsquad]

So then I just place them before the first cap after the input jack on the board and after the last cap before the output to the jack.

[zjokka]

on a fat boostered I gladly included it as it was standard on the layout
when installing the led I used a super bright red led, now the box is still popping...

I didn't measure that led yet, but is there a way of knowing the value of the PD resistor without testing?
Is it the 'super' that makes for the popping despite the 1M5 pulldown

sorry to squeeze in, but not so completely off-topic
zj

[Seljer]

So then I just place them before the first cap after the input jack on the board and after the last cap before the output to the jack.

theres that bypass switch between the capacitor and the jacks, which is the source of the popping you are trying to prevent with pulldown resistors
and like mentioned, you have to place them between the input/output cap and the switch
(sometimes, if you've got a volume control at the end of a circuit theres no need for the output one)

[ubersam]

on a fat boostered I gladly included it as it was standard on the layout
when installing the led I used a super bright red led, now the box is still popping...

It sounds like you are experiencing LED pop, in which case, you might want to check this out: http://www.muzique.com/lab/led.htm. It is like decoupling the LED circuit via a BFC. I add this in if I get popping even a pulldown resistors on the input stage.

[zjokka]

on a fat boostered I gladly included it as it was standard on the layout
when installing the led I used a super bright red led, now the box is still popping...

It sounds like you are experiencing LED pop, in which case, you might want to check this out: http://www.muzique.com/lab/led.htm. It is like decoupling the LED circuit via a BFC. I add this in if I get popping even a pulldown resistors on the input stage.

thanks man! was just planning on increasing the pulldown resistor.