Clean Solid-state Fender Blackface Preamp

[taxfree]

I don't know how similar this might be to Wampler Black 65 or Catalinbread SF6. The plan is to use this clean preamp before an IR simulator followed by an audio interface. In the link we have more information about a buffer added at the end of the circuit.
References: http://www.redcircuits.com/Page120.htm

 

[temol]

Not really a clean preamp. Well.. maybe with gain dimed. I've tested it on a breadboard.
Here you'll find some oscilloscope measurements.

 

[jesuscrisp]

Reading so often about people wanting clean preamps for these kind of setups... (or maybe it's always the same person?).

Why not just use amp modelling Software at that point? You're not using a real (pre)amp, you don't have a power amp or emulation, you're not using real cabs, and a "preamp" like this is basically a glorified clean boost with EQ. There certainly is a PCB or a couple for a dual mu amp boost with some sort of EQ in the PEDALPCB catalog though.

 

[taxfree]

Not really a clean preamp. Well.. maybe with gain dimed. I've tested it on a breadboard.
Here you'll find some oscilloscope measurements.

thanks!

 

[Laundryroom David]

Reading so often about people wanting clean preamps for these kind of setups... (or maybe it's always the same person?).

Why not just use amp modelling Software at that point? You're not using a real (pre)amp, you don't have a power amp or emulation, you're not using real cabs, and a "preamp" like this is basically a glorified clean boost with EQ. There certainly is a PCB or a couple for a dual mu amp boost with some sort of EQ in the PEDALPCB catalog though.

That’s a great idea. I was also thinking a used Quilter SuperBlock US would probably work

 

[taxfree]

Reading so often about people wanting clean preamps for these kind of setups... (or maybe it's always the same person?).

Why not just use amp modelling Software at that point? You're not using a real (pre)amp, you don't have a power amp or emulation, you're not using real cabs, and a "preamp" like this is basically a glorified clean boost with EQ. There certainly is a PCB or a couple for a dual mu amp boost with some sort of EQ in the PEDALPCB catalog though.

Thanks for helping!

 

[jesuscrisp]

I'm sorry, but I'm just fed up with this topic and I blame boutique pedal builders for perpetuating the whole "preamp" nonsense, making people believe there is a fundamental difference between preamp and overdrive/boost circuits, while they are basically all the same thing or different shades of it.

For actual help, the Fulltone Hi Mu and Fat Boost or the Vertex Steel String all have the basic 2 mu amp with EQ topology as what you posted, just different tonestacks.

EDIT: and they are available from PEDALPCB.

 

[Robert]

There are some muAmp / SRPP breadcrumb modules on the way so you could design your own, if you're into that sort of thing.

 

[spi]

Cool @Robert, any chance there's a mosfet boost breadcrumb coming too?

 

[Robert]

Cool @Robert, any chance there's a mosfet boost breadcrumb coming too?

There certainly can be. SHO style or something else?

 

[spi]

There certainly can be. SHO style or something else?

Yeah, I was thinking SHO, that appears in a stage in many pedals. Since SHO has a bias control, maybe could be either trimpot or traditional pot (bonus if it could be wired for either option).

 

[Robert]

Cool @Robert, any chance there's a mosfet boost breadcrumb coming too?

Fixed gain version

 

[szukalski]

Love me some breadcrumbs!

 

[Coda]

Fixed gain version
View attachment 57414

What about one with this thing that tells time, and a compass in the stock?…

 

[Feral Feline]

The breadcrumb mu-amp modules bode well for me!

I've been working on (&off) a dual mu-amp idea with MOSFETs for a while now, experimenting with some clipping and EQ in DIYLC. Haven't got to the breadboard stage, but should be able to soonish.

Most Mu-Amps are JFETS, so I thought I'd use MOSFETs which are alas supposedly noisier than JFETs...


Pedal/circuit is themed upon James Dean's 550 Spyder.

 

[taxfree]

I'm sorry, but I'm just fed up with this topic and I blame boutique pedal builders for perpetuating the whole "preamp" nonsense, making people believe there is a fundamental difference between preamp and overdrive/boost circuits, while they are basically all the same thing or different shades of it.

For actual help, the Fulltone Hi Mu and Fat Boost or the Vertex Steel String all have the basic 2 mu amp with EQ topology as what you posted, just different tonestacks.

EDIT: and they are available from PEDALPCB.

Why do we suggest or ask for one circuit or another here? I believe it is of interest, that there is curiosity and a desire to experiment.
This interest may belong to one person or may be common to many of them.
Maybe that's why some circuits receive so many votes and are converted into PCBs.
Otherwise, just a drive, a fuzz, a chorus would be enough and we wouldn't have entire sections of the same type of effect. Maybe it won't be so tiring for many other people.