SHO Vero Layout match to schematic

[compute88]

tried parrallel 47 and 100  no dice.  yeah 147 cap got it. 

I"m gonna try switching the zener to ground next.  (throwing shots in the dark here)

[DavenPaget]

tried parrallel 47 and 100  no dice.  yeah 147 cap got it.  

I"m gonna try switching the zener to ground next.  (throwing shots in the dark here)

The zener being there would be POINTLESS . ( It's just for polarity reversal prevention )
And the zener from gate to source is to protect the mosfet dude .

[compute88]

alright haha I'll leave the zener from gate to source. 

Interesting observation, when I turn the gain down (CCW) the hum goes up.

[StereoKills]

Caps in parallel just make one cap with a larger value. So you are essentially making a 147uF cap by doing this. It will not benefit different frequency filtering in the power line.

Not according to the Beavis site:
http://www.beavisaudio.com/techpages/Caps/

Now let's look at a more interesting power supply design, this one from the ProCo Rat distortion pedal. The circuit requires both a 9v and a bias voltage of 4.5 volts. In this schematic, you'll see the standard large value cap to ground (C1). But also there is a 47nf filter cap (C2) to ground. This is added because electrolytic capacitors do not handle higher frequencies well. Since noise in the form of radio frequency interference (RFI) and other high frequency content may be coming in through the power supply, the C2 part ensures it will be dumped to ground.

[compute88]

I buit a couple more on the breadboard.  Tried the suggested grounding schemes, still have the ground hum... gonna try a new supply, I think this one is just noisy, since the 9v bat sounds clean as a whistle.  Also noticed, that the case almost acts like a microphone with the effect on and nothing plugged into the input.  I'm guessing this is inherent to the design of the circuitry? and the super high impedance?

[compute88]

damn ugly wall wart... went to GC, new one is clean as a whistle. 

[compute88]

Ohh did a Vero Layout... not the most compact, but leave room for a big 100nf cap (like I'm using), and lets everything lay nice and flat to the board, plus all IO on one side, and pot hookups on the other.

I put the 100 Ohm resistor on the end (you can omit) but it's in the schematic on Zvex's site.   also the 47uF cap is optional.

[DavenPaget]

damn ugly wall wart... went to GC, new one is clean as a whistle. 

What wart did you buy ? 

[compute88]

bought the dan electrode  $19 at guitar cent. has a variable voltage reduction too...   Just built #2 of these as a gift for a family member.  I found a way to squeeze a 9v in there too if needed.

[DavenPaget]

bought the dan electrode  $19 at guitar cent. has a variable voltage reduction too...   Just built #2 of these as a gift for a family member.  I found a way to squeeze a 9v in there too if needed.

Oops . I mean nvm . i saw the thread .