wah fine tune pot parameter adn bandwidth

[walters]

thought bandwidth was the low pass cut off frequency and the high pass cut off frequency = a bandpass filter

Q is the resonance peak not the bandwidth


1.) Where is the cut off frequencys upper and lower points in a wah wah pedal?

2.) The wah's pot adjusts the Frequency of the bandpass filter, the bandpass filter has to have 2 "cut off points" the upper and lower. How do you set or adjust the cut off points which is the bandwidth not the resonance

3.) On DJ mixers they have TAPER parameters for the crossfader and volume controls now to get different taper curves/slopes. How can i apply this to a wah's taper pot?

 

[walters]

Re: wah fine tune pot parameter adn bandwidth

The Dunlop DB01 Dimebag Darrell Crybaby From Hell Wah Pedal has a "fine tune knob" that sets the lower and upper limits for the wha's sweep pot. Is this the bandwidth?

This "fine tune knob" must be a trim pot across the wha's sweep pot wiper terminal and one of the side terminals it seems

Fine Tune:
Rotating this knob clockwise extends the high end of the sweep range, making the toe down position brighter as opposed to a darker sound when rotated counterclockwise.

I wonder how they did this fine tune parameter

A wah is a bandpass filter with variable center frequency

The Q knob/parameter seems to me it sets the resonance peak
but how would u change the "upper" and "lower" cutoff frequency points?

The wah wah has a upper and lower cutoff frequency points but how do u change them? (this is true bandwidth)

The Dunlop DB01 Dimebag Darrell Crybaby also has a Booster circuit, i'm guessing its a pre-boost to give more gain to the first transistor so it clip's or overloads the inductor.

I found a problem with that, is it boosts some frequencys but cuts and makes other frequencys very thin, why is that boosters do this? T

he booster changes the sweep/range making some frequencys boosted and others very thin why? (it makes the sweep/range worse in some ways)

New DJ mixers have a variable slope/contour control connect to the crossfader to change the slope/sweep of the tapper

How can this variable slope/contour parameter be connected to a wahs sweep pot to change the slope and contour/curve of the tapper?

 

[walters]

Re: wah fine tune pot parameter adn bandwidth

Q variable control-
1.) controls the SHAPE of the filter peak
2.) adjust the frequency WIDTH

Fine tune-
1.) extends the HIGH end of the sweep range
2.) adjusts the Toe-down Frequency

Sweep cap. selector switch
1.) determines the Frequency CENTER


Frequency RANGE chart

Range Switch Heel Down Fine Tune MAX Fine tune MIN.

1 400hz 2.2Khz 1.5Khz
2 400hz 1.9Khz 1.3Khz
3 375hz 1.8Khz 1.2Khz
4 345hz 1.6Khz 1.0Khz
5 295hz 1.4Khz .75Khz
6 250hz 1.2Khz 1.2Khz