1M pulldowns in place & STILL popping!?!

[vseriesamps]

Hey everybody

I just built the ROG Tube Reamer (great pedal!) and I put 1 meg pulldown resistors at the input and output of the effect - heck I put them right on the switch! - to ground but it still totally pops when I stomp it. Anyone with an insight into why this might be happening?

Thanks always
K

[Danny G]

Good question, I was about to ask this myself.  With all my praise for the Tube Reamer, I did notice it pops like a mother-effer.  I did the 1 Megs on the input and output jacks as well.  Pop!!!  

Still sounds killer though, heh!

[puretube]

if it is this: http://www.runoffgroove.com/tubereamer.html,

are you sure you connected the pulldown-R at the input directly to the inputcap 0.05? (not to the input-jack!).

an output pulldown-R in this case doesn`t make sense at the vol-pot-wiper, but should connect directly to the output-jack!

:?:

[Fret Wire]

Are you using a LED?

[Danny G]

I'm using an LED.  I'll try the 1M to the input cap though.

[Lonestarjohnny]

The Ol' Orval Redenbacher Syndrome, Little less salt please  :lol:
J/J, I got mine on the Jack's Guy's, Just Like Puretube Stated, and I got no Popping,
Johnny

[John Egerton]

Are you using your LED in conjunction with a 3pdt switch?

If so, make sure that you're using the correct current limiting resistor value.

I had the same trouble with my SmallClone... I used a lower value resistor to make the LED brighter, in the end, I discovered that to be the source of the problem, after I'd completley frankinstiened my pedal with pulldowns.  :roll:

Make sure you're using a value such as 4.7k ohms

... John

[AL]

Do a search for this one. There was a discussion here on the same subject last (?) week. RG (who else?) had a solution and had some schems posted on his site.

AL

[ragtime8922]

Some schems use 2.2Meg resistors. Will this make a difference?

[AL]

I think this is it??

http://www.diystompboxes.com/sboxforum/viewtopic.php?t=25772

AL

[Gus]

You have a bad switch or real leaky caps.  With good caps you don't need pulldowns

[puretube]

wrong...

[RDV]

Practically all my true bypass pedals have some popping even with pulldowns, but I use a lot of amp preamp gain which amplifies everything(what a redundent sentence). The only one that's almost completely quiet is the Rodent that uses R.G.'s Millenium1+. None of them pop so loud that it's really heard over the din of my awful band though.

RDV

[Gus]

I am not wrong.

 Pay attention.  When using leds with 3 pole switches you need a very good low ESR electro across the power supply rails.  Use >220uf not Xicon or IC brands.

 If you are building on PCBs and the in and out caps are soldered to the board, make sure the PCB is clean between the leads, any flux will be a leackage path.  I tend to not use PCBs so my caps have one end in the air no PCB leakage path.

Some switches pop no matter what you that is a switch problem

[Mike Burgundy]

http://diystompboxes.com/sboxforum/viewtopic.php?t=23743
That's the one.
Good electro's across the PS is always good. If you can't get the really low ESR ones, or have to pay too much, a 1nF poly across the electro will do just the trick.
In-and outputs can still be charged, even with *perfect* caps. Go figure.
That link has some very interesting info on LEDs causing pops.

[RDV]

Aren't low-leakage electros quite large though?

RDV

[Mike Burgundy]

use a regular one, bridge it to get the high-frequencies covered.

[Gus]

I am not wrong.

 Pay attention.  When using leds with 3 pole switches you need a very good low ESR electro across the power supply rails.  Use >220uf not Xicon or IC brands.

 If you are building on PCBs and the in and out caps are soldered to the board, make sure the PCB is clean between the leads, any flux will be a leackage path.  I tend to not use PCBs so my caps have one end in the air no PCB leakage path.

Some switches pop no matter what you that is a switch problem

[puretube]

a capacitor doesn`t only get charged from the "inside" of the circuit (bias) through leakiness - but also from the "outside" (e.g. momentary signal-voltage);

scroll down to: "so then what", for more info on "pop" ("impedance jumping");

...

[RDV]

Doesn't "Millennium" transistian type bypass help in this regard. I say that cause my Rodent(w/Millennium 1+) is almost completely pop-free.

RDV