CJ

Snarling Dogs Bawl Buster Schemo>
« on: July 11, 2020, 02:59:21 AM »
just got done with this so why not throw it down

yeah its a wah wah pedal

anybody know how that FET booster works?  thanks!
















« Last Edit: July 11, 2020, 03:02:57 AM by CJ »
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


Gus

Re: Snarling Dogs Bawl Buster Schemo>
« Reply #1 on: July 11, 2020, 09:20:46 AM »
drain and source are interchangeable
gate to ground using the potentiometer
2sk30 is a JFET
22k drain
12k in parallel with the 10K boost control and 6.8uf cap at the source

Min gain  under 22K/(10K || 12K)

That is a lot of inductance for a wha

CJ

Re: Snarling Dogs Bawl Buster Schemo>
« Reply #2 on: July 15, 2020, 12:46:32 AM »
mods done:

rip out C2 and C3   for more hi end,

ripped out one of the series inductors to reflect original crybaby,

changed caps to  .01      ,      .03  ,and   .047  uf on selector switch,

stock caps would actually turn the volume off when the pedal was back all the way,
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Whoops

Re: Snarling Dogs Bawl Buster Schemo>
« Reply #3 on: July 23, 2020, 10:59:04 PM »
I always loved the Snarling Dogs pedals.

What was the problem of the pedal?
I had one of those and it sounded great stock

mods done:
rip out C2 and C3   for more hi end,

This is Bass Wah wah pedal, it's supposed not to have a lot of high end and be tuned to the frequencies of the bass guitar

That mod might be fine if you want to turn into guitar wah pedal.

All the Snarling Dogs Wah pedals are based on the same circuitry, there were a lot of different models.

You can reference the schematic of the "Whine-O Wah" if you want to know which circuitry was used for guitar

ripped out one of the series inductors to reflect original crybaby,

A crybaby is so cheap why changing this to be similar to a crybaby when it's a different thing?
The series inductors is part of the magic of this pedals

For stompboxes I recommend you these 2 forums a lot of info there:

Diystompboxes and Freestompboxes

https://www.diystompboxes.com/smfforum/index.php

https://www.freestompboxes.org/index.php

___

Nice article on Fet boosters:

http://www.muzique.com/lab/boost.htm


 

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