Hermida Mosferatu [traced]
- roseblood11
- Tube Twister
I just found this:
https://i49.photobucket.com/albums/f252 ... feratu.gif
No idea, if it is correct...
https://i49.photobucket.com/albums/f252 ... feratu.gif
No idea, if it is correct...
- reneshelle
- Solder Soldier
Interesting schem. dual gain stages and soft clipping for half the waveform and hard clipping for the other half. Could be fun to tweak around with.
But I try to remember the fact that I don't need more drive pedals
But I try to remember the fact that I don't need more drive pedals
- roseblood11
- Tube Twister
freq67 wrote:I wonder why they call this pedal Mosferatu????roseblood11 wrote:I just found this:
https://i49.photobucket.com/albums/f252 ... feratu.gif
No idea, if it is correct...
?? Aren´t four Mosfet´s enough?
- Angle Loss
- Breadboard Brother
That is NOT correct. I believe that was some early incarnation of the Mosferatu which Hermida allowed people to see, but is not the final form at all. He has said in the past that the Mos and Zen are related and that the Mos was created on the way to the Zen.roseblood11 wrote:I just found this:
https://i49.photobucket.com/albums/f252 ... feratu.gif
No idea, if it is correct...
So there isn't any dual gain stage...Angle Loss wrote:That is NOT correct. He has said in the past that the Mos and Zen are related and that the Mos was created on the way to the Zen.roseblood11 wrote:https://i49.photobucket.com/albums/f252 ... feratu.gif
- Angle Loss
- Breadboard Brother
It has been a long time since I have thought about this...so any corrections are welcome. As I recall, he gave that schematic out on another diy forum and said it was an earlier incarnation of the Mos. I believe it was shown to demonstrate something about a MOSFET clipping arrangement.
He goops his pedals, so I don't believe he would release any final schematic. From what I remember, then Mos has mosfets+germ diodes in anti-parallel in the negative feedback loop of the opamp like most overdrives. The Character control changes the pre-gain frequency structure in the negative feedback loop, and the tone control is similar to a Rat. I no longer have a Mos to tell you for sure...although maybe someone else here can chime in with confirmation or correction, but I do know that that schematic is not correct to the production Mos. I hope that helps.
He goops his pedals, so I don't believe he would release any final schematic. From what I remember, then Mos has mosfets+germ diodes in anti-parallel in the negative feedback loop of the opamp like most overdrives. The Character control changes the pre-gain frequency structure in the negative feedback loop, and the tone control is similar to a Rat. I no longer have a Mos to tell you for sure...although maybe someone else here can chime in with confirmation or correction, but I do know that that schematic is not correct to the production Mos. I hope that helps.
- Angle Loss
- Breadboard Brother
Forgot to mention, the schematic shows dual gain controls plus both post-gain treble and bass controls, which obviously the Mosferatu does not have.
- bigorangefan79
- Breadboard Brother
Mosfe(t clippers) ra(t tone control) tu(be screamer type) ... sounds like a zendrive... no really, it sounds like a zendrive.
- bigorangefan79
- Breadboard Brother
If I were to guess I would say the Mosferatu is a Zendrive with mosfet clippers only. It definately has a little more gain.
- kusi
- Breadboard Brother
i traced the older 3-knob-version. "vioce" is just a variable resistor for R5 (lok at the zendrive)
about the other "mosferaut"-schematic, i asked alfonso some years agoo about it. his answer:
> That design has nothing to do with my commercial product. I just liked the
> name so much that I decided to use it in the unit that I make.
regards, kusi
about the other "mosferaut"-schematic, i asked alfonso some years agoo about it. his answer:
> That design has nothing to do with my commercial product. I just liked the
> name so much that I decided to use it in the unit that I make.
regards, kusi
- reneshelle
- Solder Soldier
I'm guessing here, but if you look at the voice pot on the zendrive and transfer that idea to the mosferatu, I don't think you're that far off...