Popping when I turn my Fuzzface "ON"

[chuckfalcon]

Hi everyone, I have been working on a pretty standard Univox Superfuzz circuit.  It works but there are a couple of issues.  It makes a "pop" sound ONLY when I turn on the fuzz.

Here are some things to note:

-I am using a 3PDT
-I'm not using an LED
-I put a 1M resistor from the input to ground
-I put a 1M resistor from the output to ground 
-I am not getting any DC reading from tip to ring on the input OR the output except for 0.001V (but that wouldn't really matter though, with a reading that small, right?)

I was getting a pop sound when I hit the bypass switch to turn the fuzz on AND off.  I looked at my wiring and my output cap's orientation was reversed.  So I swapped it.  No more popping when I hit the bypass switch to turn the effect off

Anyone know how to cure my popping when I turn ON my fuzz?

Also one other thing that I noticed.  When I power this circuit with a 1-spot and turn on the fuzz, I am hearing a high pitch humming sound.  When I power it with a 9V battery, it goes away.  What in the world could THAT be?

Any help?

[peterg]

Please post the schematic and layout you used.

[chuckfalcon]

Okie doke.  Here is the layout:


Here's the schematic.  All I did was add the 1M's to the input and output:

[chuckfalcon]

One other thing that I noticed is that I can only hear the "pop" when the "gain/expander" and the "volume/balance" are turned up at least halfway.  What could this mean?

[antonis]

You shouldn't use the 1M output resistor (it's purpose is covered by the 100k one..)

You should rename the -9V green trace on your layout as GND.. 

Maybe you have to try a 3PDT IN & OUT grounding wiring (despite of the bleed resistors)..


edit: I can't verify capacitors matching polarity on your layout..

[antonis]

 

I am not getting any DC reading from tip to ring on the input OR the output except for 0.001V (but that wouldn't really matter though, with a reading that small, right?)

If you multiply the 1mV on the Input with the overall circuit's gain, I'm not so sure if it remains small enough...

[chuckfalcon]

You shouldn't use the 1M output resistor (it's purpose is covered by the 100k one..)

You should rename the -9V green trace on your layout as GND.. 

Maybe you have to try a 3PDT IN & OUT grounding wiring (despite of the bleed resistors)..

Here is how I have the 3PDT wired.  I think that this grounds the input but not the output.  Could that maybe my problem?  Also, I am not using an LED and I don't have anything at all connected to the "LED LUG.

edit: I can't verify capacitors matching polarity on your layout..

Whoops, sorry bout that.  I edited it and made them a little larger and not transparent.  I hope that helps.




Thanks for your help.  This thing is driving me crazy.