Implemented Crowther Hot Cake

[2112]

While we're all requesting our favourite drives I'll request mine - the Crowther Hot Cake. I prefer the newer version with the presence control.

TPS Demo (Skip to around 32min in)



Tooting my own horn here, but here's a solo (skip to 3:10) that was the Hot Cake into my Marshall DSL


Schematics

 

[Geordielad]

+1

 

[darrenw5094]

+1 Dude

 

[Dan_CFH]

That’s an awesome one man! My wish list pedal would be the Protone Deadhorse overdrive pedal with the attack and diode selection switch.

 

[johnnypig]

+11111 Love this pedal and it will get the Deerhoof covers rolling!

 

[Jan Geerts]

+1

 

[bread]

Yes please

 

[Lodeman]

+1

 

[jaycal6]

+1

 

[Adman103]

+1. Great pedal, and mixes so well with Vox style amps.

 

[mjb234]

+1

Recently got one & it’s got something unique vs other drives/fuzzes

 

[Anthony76]

Another +1

 

[sprint]

+1 - me likey

 

[Jipps0525]

damn that is cool +100 from me

is there no way we can manipulate one of the current drives to get close to this?

 

[ruso]

What a simple circuit. I have all the parts to breadboard it too. I’m going to try it out.

 

[FractalAudio]

Schematic is suspect. C5 doesn't make sense. You never put a capacitor to ground on the output of an op-amp as it erodes your phase margin.

 

[Geordielad]

I have read somewhere that whilst there is a place on the pcb for C5 it is actually omitted from the build, i think it was in the 2008 version

 

[ruso]

Schematic is suspect. C5 doesn't make sense. You never put a capacitor to ground on the output of an op-amp as it erodes your phase margin.

https://www.pedalpcb.com/docs/AwfulWaffle.pdf

 

[FractalAudio]

https://www.pedalpcb.com/docs/AwfulWaffle.pdf

I suspect that capacitor is supposed to be across the 100K feedback resistor. You don't put a capacitor to ground on the output of an op-amp, especially something like a '741 as you reduce phase margin and the amp can become unstable.

 

[ruso]

I suspect that capacitor is supposed to be across the 100K feedback resistor. You don't put a capacitor to ground on the output of an op-amp, especially something like a '741 as you reduce phase margin and the amp can become unstable.

Found this:

https://aionfx.com/news/tracing-journal-crowther-hot-cake/

According to the person who did the write up, C5 was unpopulated on the unit they traced. Notice the “goop.”