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In fact, I stumbled upon a fake TPA3118!

Next time I know where I can buy a real one.

Is this maybe a good alternative to the TPA3118? (Do you know it?)

Thanks for the theory.
So, if all this, in the real life, sounds like a mild overdrive is ok.

I have to find my old Fetzer Valve.



That is not so different, too. The input cap is replaced by a 68k (that could tame the input signal), and I guess I used a J201. Drain voltage set at 4.5v.
I remember it sounded totally clean.

Hello,
I have on my breadboard this:



Just some difference because I miss some parts.
R1 is 2.2M
R2 is 12k
C3 is 33uF

I might have just a bit of more boosting. Over 20db.
Sooner or later I want to build it to use it, but even to test some jfet transistors.

The transistors I'm using now is ok, and I'm testing the circuit on a solid state amp.
It works, but it distorts a bit, I assume it was a clean boost.
I just want to know if it is ok.

Thanks.

I see them pretty often on eBay, though they come and go. Small Bear has some sets as well, but they're extremely expensive and international shipping is a lot.

However - for a Fuzz Factory in particular, I would really not be too concerned at all. It absolutely brutalizes the transistors in a way that makes the type & specs fairly unimportant. Selected sets are definitely worthwhile in a Fuzz Face or Tone Bender, but IMO not so much in a Fuzz Factory.

I see some US shop, but could be expensive to buy there because the shipping, indeed. I'm in Europe.

About the Fuzz Factory, I had read probably some discussion about some guys used to test some pair of transistors before to choice the right ones. I have to say I just bought a pair with the most advised hfe. It sounds good.

Maybe I can't do anything except to buy kits (Fuzz Face, Tonebender...) with matched transistor included.

Hello guys,
I built just a Fuzz Factory using germanium transistors. A pair of AC128, hfe selected.
The germanium transistors we can find today are different model, and it's very hard to find the right hfe to build pedal Fuzz Face type.

I would like to buy from Europe some good germanium transistor. I used to buy from Banzai Music and Musikding.
Banzai has a good choice of germanium transistors, but not hfe selected, and I don't want to waste money to match maybe one couple.
Musikding has the hfe selection, but very short supply, more common hfe value are hard to find. Though, they has some kit with matched germanium transistor. But I prefer to buy transistors and the parts separately, and make the board by my own.

Where we can still to buy matched germanium transistor?

Thanks for the advice. I finally worked out the issue. I bloody used 10k resistors instead of 100k for R5 and R9! Swapped them out and it now works perfectly with no smoke

Excuse me, but why 10k resistors to the ground before the output make your op-amp smoke? It doesn't seem to me something so bad, or I wrong?

The layout on protoboard is not so bad! Is that verified?

I would like to try this daughter board when I'll build my first Guv'Nor.

This is a GV-2 schematic I found, but I think there's something wrong with the Deep control: R20 100k is in parallel with C16 68nF, but that makes it work weird in my emulator:


There's another schematic here. And the Deep control works better.


This is my emulator (a rev log pot seems more balanced) and, though I tested it putting the old original Guv'Nor circuit in front of the Deep control part, I guess is it clear. (GV-2 tonestack could give more bass and less treble).


And here a video that show the frequency of the Deep control.
https://youtu.be/rbiDg2mqTXU?t=103

Looking all this I didn't find the frequency so low. It didn't depends from Deep, at least I guess.

I'm looking some mods that change the Deep control and see how that could be useful, and I found this:

Replace these parts:
R19(4.7kOhm)->10kOhm
R21(470kOhm)->470kOhm->150kOhm
R9(1mOhm)->220kOhm
C23(22pf)->47pf



I tried to emulate it, but it seems ruin the deep control. It minimizes too much the peak at max setting, at min setting cut bass and boost mid, and I got a drop of volume. Is really that the results?

Your work is great!
Though I know we are talking about about ESR graphic fuzz and Jordan Bosstone, I'm just a bit confuse without to see any schematics.
Do you keep it "secret" or you just don't have any picture of a final schematic?

From the page you linked to me early I downloaded that excel file where there are a lot of pickups with a lot of value. I had it, but I forgot it. That will be very useful.

how close do I need to get? Well... I think it's impossible to get the exactly response of a single pickup, impossible because there are too many variants and influences. And probably a bit pointless, though I would like to try it, because the sound is not made from that pickup simulator, but the signal comes from our guitar, through the cable and pedal chain.
But I just like the idea to get the response of the pickup simulator more similar to a Fender single coil, clean and bright, or a Gibson PAF stronger and beefier. If all this has sense.

I have in the cart for my next order a TL019, because the "019" is the one in the Jack Orman schematic, TL and not TM because that should be the same, but it's slightly smaller and cheaper where I'm going to buy.
I'm not sure I want to buy all the four transformers, thought it could be interesting.

[inductance]

Ok, I did a bit of confusion with the unit.

Your pedal is really nice! And I know the idea of the pickup inside works fine, but my target is to work on the value of the parts to get (just ideally and in theory) the response of the most famous pickup model. A random pickup doesn't help me. Then, considering the cost of the pickup, eventually I prefer the transformers.

If I can't find any kind of inductor from 1H to 8H (from vintage to modern pickup) maybe I can make some selection of the transformers. But I need some information about this thing.

If I look inductance and primary impedance (that I assume are the parameters that make the transformers work in this schematic) in the chart posted above I can select these transformers. (The coils used is the primary so I'm totally ignoring the secondary).
42TL021: 1.50H - 4k
42TL018: 2.55H - 7k
42TL019: 3.44H - 10k
42TL012: 5.38H - 10k

(These are the ones I can find in my favorite shops):

I know TL019 it is good for the project, and I TL018, too. I can guess the TL012 is fine, too. What about TL021 with lower inductor and impedance?

Hello, I'm looking for some weird and new project, and I got into the pickup simulation by AMZ Muzique. http://www.muzique.com/lab/pickups.htm

I'm gonna build the project with the transformer, but I'm interesting in the LRC type (inductor, resistance and capacitor), trying to create (of course very approximately seeing all the variable) Fender, Gibson and other pickups I found all the parameters I need.
Resistor is a resistor, cap is a cap. But what about the inductor?

I found a project that use this kind: http://www.banzaimusic.com/bourns-2124-v-rc.html
But that is only 1H and just it, it's very limited to be used for vary pickup models. And (though I'm not sure) if I can use it in series to get 3, 4 or higher Henry values that will became a very large project!

I'm wondering... can I use this other kind of inductors?
http://www.banzaimusic.com/ctc-ec24-1uh.html (Especially this small one).
http://www.banzaimusic.com/ctc-ch6080-10uh.html
Or thise are not the same and don't work for the target?

Thanks.

It's a gain monster. I built a version of mine of this.
But... D1, D3... where's the diodes?

Thanks.
My solid state amp is a 120w, so I guess it has a lot of headroom.
Anyway, the overdriven I hear is the op-amp clipping for sure, because I tried even with a master volume control in the op-amp circuit, so there's no much signal in front of the amp, but is the gain in the circuit to clip the op-amp. I hope I told it clearly.

I'm a bit sorry about the noise of a tube amp. I didn't know it. In general my DIY pedals don't have noise problem, if the project is good and I built it fine.