Honey Dripper +: a Modified 70's Dipthinizer Circuit

Cybercow

Well-known member
Build Rating
5.00 star(s)
4 years ago I procured a couple MadBean 2015 "Honey Dripper" (Colorsound Dipthonizer) PCBs for a custom commission request and got it built out with the requested modifications.

This is a sweet, versitile auto-wah sort of circuit from the 70's. Instead of a single, fixed filter, it has a 'formant' selector switch for generating (simulating) four different vowel formants with a sweep rate adjustment and a fuzz blend control. And while the "fuzz" is actually just a a pair of soft clipping diodes on a parallel drive circuit (opamp), the OD it provides adds some nice grit to the effect when desired.

Originally designed to fit into a 125B enclosure, the requested mods demanded a larger box, so I was able to get it all stuffed into a 1590BB enclosure. And as usual, Spencer at AmplifyFun did a great job on the UV paint job as per the specs in my submitted Photoshop file.

Other added modifications were a Low, High (EQ) and Volume circuit (GuitarPCB "Tone Tweak") after the Honey Dripper (Dipthinizer) circuit. At the Volume midpoint, the pedal is at unity gain and gets a good bit louder after the Volume is turned up from the 'noon' position. The Lo & Hi controls give an exaggerated range of bass & treble.

This turned out to be one of the better auto-wah circuits I've ever had the opportunity to play with. When I started this project, I was unaware how rare the original Dipthonizer pedals are. Glad I acquired a second PCB to build one for my rig. (UPDATE: Later, MadBean updated the Honey Dripper with a fresh 2024 layout.)

Video demo here:

So enough of the babble . . . . onto the circuit porn . . . .

Honey_Dripper+_02_Done_Front_01.jpg

Honey_Dripper+_02_Done_Front_02.jpg

Honey_Dripper+_02_Done_Guts.jpg

Here's a marked up copy of the schematic to show what mods were done.
MadBean_Honey_Dripper_Schematic_Annotated.png

And a screen-scrape of the PCB layout mod points . . . .
Dipthonizer+_PCB_Marked_Mods.png

Thanks for lookin' !
 
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