CJ

Snarling Dogs Bawl Buster Inductor
« on: July 05, 2020, 12:23:23 AM »
we have a Wah Wah pedal here,

it looks cool,
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


CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #1 on: July 05, 2020, 12:29:45 AM »
this guy sits inside a heavy steel can, not mu metal,

looks like this>
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

CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #2 on: July 05, 2020, 12:33:11 AM »
oh  wow,

it's two----two----two inductors  in one!
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

CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #3 on: July 05, 2020, 12:44:12 AM »
so why the two coils?

that is what we are trying to figure out.

different cores and turns for different sounds from each, combining to make one great and complex sound?

could be, look at the two different colored wires,  an effort to make assembly easy so the workers don't get mixed up?

what about humbucking.  wah wah pedals are noisy and that is an understatement.

so we can measure parameters and figure out if the coils are different, or if they are the same with just different colored wire to throw somebody for a loop or maybe they ran out of wire or maybe they want to make it easier to hookup for the workers, why having two different colors would make it easier i do not know.

so i bet they figure that the diystompbox tracers would think some magic is going on which might sell more units,

turns out the coils have the same DCR at about 18 ohms piece, and the same inductance, about 675 mH each and about 1.3 H combined. inductance is not turns squared in this case as the turns are on two cores. so it just gets doubled.




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

CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #4 on: July 05, 2020, 12:50:29 AM »
Frequency vs Inductance for both coils in series and each coil by itself.

starts are spliced to form a humbucking inductor.  just like a guitar  pickup.

another benefit will be lower capacitance due to using half the turns on each.

does it sound better? don't know, have not done an A/B test.

is it quiet? some folks say they pedals are noisy anyway, we will find out after we fix the darn thing.
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

CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #5 on: July 05, 2020, 01:24:50 AM »
and the Ind. vs Level would seem to indicate that these are two identical cores,

DCR is equal, wire size is equal so we have the same turns.

do not want to unwind and rewind, so we take a Mean Length Turn measurement with a thin piece of mylar tape wrapped around the outside and then measure the tape length = 0.75 inches.

wire is 0.0042" which is normally #38 AWG.

#38 = 670  ohms per 1000 ft. we have 18 ohms each coil,

so 18/670 = 0.026865672   x 1000 t = 26.86 ft = 322.38 inches wire length.

so divide length of 1 turn into total length = 322/.75 = 430 turns each coil.

we can get an AL value for the cores now.

L=N^2 AL ,    L in nano Henries,   multiply mH by 1^6 for nano H,

700 mH = 700,000,000 nH / 430^2 =  3785 AL
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

CJ

Re: Snarling Dogs Bawl Buster Inductowe are using 400 turnsr
« Reply #6 on: July 05, 2020, 02:25:22 AM »
print
« Last Edit: July 05, 2020, 02:39:14 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

CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #7 on: July 05, 2020, 02:41:21 AM »
this core would work if you could figure out how to wind it,

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


CJ

Re: Snarling Dogs Bawl Buster Inductor
« Reply #9 on: July 06, 2020, 03:48:47 AM »
Thanks Gus! i knew you would come up with the answer!  :D

have you heard about the error when they tried to bootleg the Crybaby?

they got one of the resistors wrong

33K should go across the coil but they have it in parallel with the 470K>

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 Inductor
« Reply #10 on: August 04, 2020, 09:47:55 PM »
33K should go across the coil but they have it in parallel with the 470K>

Thats what makes it sound better than the Crybaby


 

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