New! All-original TEXAS BLOOD wah pedal!

As you may already know, I have spent literally years researching and studying 1960s Italian-made wah pedals. Many of you also know that these are regarded as the finest sounding wah pedals ever manufactured. To that end, I had succeeded in cloning the circuit and more importantly, the sound of these vintage treasures. The saying is, "imitation is the sincerest form of flattery" and one cannot help but notice that some shops are selling similarly modified wah pedals blueprinted to the TEXAS BLOOD modification spec. With that said, I've decided to take all of this to a higher plane than mere circuit cloning.

I decided to develop a whole new TEXAS BLOOD Original Wah Wah Pedal based on an heretofore-unseen evolution of the vintage circuit. Finally, I am happy to announce: The TEXAS BLOOD Wah is completed and now available. 

"Tropical Fish" Capacitors and the Issue of Tonal Duplication:

The most difficult portion of this project was overcoming the considerable problem of duplicating the tone of Mullard tropical fish capacitors. Combinations of Halo replica inductors and the tropical fish capacitors come very close to the vintage sound, but do not duplicate nor surpass this aspect of benchmark wah tone.

How in the world do these capacitors make for superior tone? Fundamentally, a capacitor is a device which holds a charge and blocks DC. Ideally, there would only be the factor of capacitance, but in the real world, each capacitor will also have unavoidably varying degrees of resistance and inductance. The ratios of these factors in any capacitor will contribute to the unique tonal characteristics of various brands and manufacture of capacitors. 

Simply put, too much resistance and inductance are generally not positive attributes for capacitors. However, some resistance and inductance is unavoidable although none might be thought to be ideal. Coming the closest to this ideal is the "tropical fish" capacitor. 

Thus, I decided to combine this ideal ratio of resistance and inductance to the capacitance of these capacitors. 

Blue Fish Reactor:

If you look closely, you will see the blue molded parts on the circuit card. This development of mine, I call the BLUE FISH REACTOR. LOL!

As part of developing an effective emulation of the Mullard tropical fish capacitors, I came to some interesting conclusions and results.

Please refer to the graph chart and you can see the peak point of the curve. The sharpness of this peak is called the "Q" and the higher the Q, the sharper the peak. Because theoretically, the Mullard tropical fish capacitor is not "ideal," the capacitor actually has another Q.

I call the second Q, "Q2." This Q2 factor will affect the wah sound more strongly for frequencies lower than 1KHz. It is perhaps for this reason that the 1960s Italian wahs were called VOCAL WAHS. Similarly, 1970s wahs, which lacked these capacitors were subsequently termed INSTRUMENT WAHS as they performed quite well on frequencies above 1KHz.


Now, those two Blue Fish Reactors have both a Q2 and Q3 factor and thus, affect the tone both below and above 1Khz. In other words, they are both good for VOCAL and INSTRUMENT range. What does this mean for you? Your guitar sings in both the vocal and instrument ranges. It is not limited to thin wacka-wacka sounds as so many wahs are.


1969 Italian V846 TEXAS BLOOD WAH model V84i
Inductor Filmcan Troidal Coil Halo replica
Transistor 2N5172 2N5172
0.01uF capacitor Polystyrene Polystyrene
0.22uF capacitor film cap Film Cap plus Blue reactor


Needless to say, the TEXAS BLOOD Wah has a very wide frequency range. You can play with the first half of the wah pedal's deep vocal range and then instantly press the pedal forward for more conventional high-range wah sounds. No other wah can accomplish this. 

Initially, I started all of this just to duplicate the Italian wahs so loved by Jimi Hendrix and Stevie Ray Vaughn. The TEXAS BLOOD really matches these magical tones and then some... I would venture a guess that if either were alive today, they could be very happy with the TEXAS BLOOD wah.

 Demo Sound 1
Demo Sound 2
Demo Sound 3


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User Review

"In almost any musician's life, there are the rare occasions of a profound musical epiphany. I had such an experience when I plugged in the TEXAS BLOOD Wah for the first time. I was expecting something good for certain, but as soon as I started playing, I thought, "Oh my, that is IT! THAT is THE SOUND! THAT'S the wah sound of Robin Trower ala "Shame The Devil" and "Confessin' Midnight." I'd always considered his wah tone on those tracks as the pinnacle of wah tone — a tone so huge it sounds like something bigger than a mere electric guitar. I never thought I'd ever attain that tone, but lo and behold, here it is in your wah pedal, out of the box. I'm stunned. Normally, I endlessly tinker with and modify gear, but again, out of the box, it's all there. Nothing needs to be done, nothing needs to be improved. Kazu-san, you've hit a grand slam home run on this one... Thank you!" ~ John Evosevic