aero
New Member
Posts: 2
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Post by aero on Jan 7, 2019 11:04:03 GMT
Hello! I got here through reading about the Mojo Maestro DIY project, heard the audio files and was very impressed! I also read you could add a transformer, which is very intriguing But I have no idea hon how I would go on about wiring and powering it, any kind soul would like to chip in and help? Many thanks! vale
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Post by Ethan Winer on Jan 7, 2019 18:07:34 GMT
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aero
New Member
Posts: 2
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Post by aero on Jan 8, 2019 8:33:36 GMT
Thank you Ethan much appreciated! Do you think there would be a benefit of trying to use a 'better' transformer or that would defeating the purpose?
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Post by swan808 on Jan 10, 2019 17:44:20 GMT
I would be interested how this turns out - I was also impressed with the Mojo box...I understood that it takes large transformers to give a pleasant saturation? Small ones you will just end up clipping?
Ethan quick question about the mojo maestro - this is soft clipping right? Does this only change the sound by clipping and thus lower level waveforms are not affected? It was my understanding that 'mojo' or saturation affects all the signal no matter what the waveform amplitude?
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Post by Ethan Winer on Jan 10, 2019 18:08:23 GMT
Do you think there would be a benefit of trying to use a 'better' transformer or that would defeating the purpose? Yeah, probably defeat the purpose. Good transformers are more transparent, and so have less "transformer sound."
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Post by Ethan Winer on Jan 10, 2019 18:21:17 GMT
It was my understanding that 'mojo' or saturation affects all the signal no matter what the waveform amplitude? This is a good question! I think most non-linearity is level dependent. For fun I just Googled transformer saturation curve and got a bunch of graphs that look more or less like typical "soft" clipping. So it's probably fair to say that most transformers are similar to tube circuits in that they're clean up to a point, then start to clip a little, then clip even more. Related, I used to use an 8-channel Ebtech Hum Eliminator in my home studio, before I re-wired all the gear using balanced wires. The cheap transformers in that box were very clean up to a certain level, than when into terrible sounding hard clipping.
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Post by swan808 on Jan 10, 2019 19:56:39 GMT
It was my understanding that 'mojo' or saturation affects all the signal no matter what the waveform amplitude? This is a good question! I think most non-linearity is level dependent. For fun I just Googled transformer saturation curve and got a bunch of graphs that look more or less like typical "soft" clipping. So it's probably fair to say that most transformers are similar to tube circuits in that they're clean up to a point, then start to clip a little, then clip even more. Related, I used to use an 8-channel Ebtech Hum Eliminator in my home studio, before I re-wired all the gear using balanced wires. The cheap transformers in that box were very clean up to a certain level, than when into terrible sounding hard clipping. thanks for the response ethan...am I right in thinking that saturation is simply low level distortion, and does that mean all these words like saturation, overdrive and distortion are essentially different levels of waveform clipping? And how does one manage to softly clip a waveform over a broad amplitude to get the sorts of musically useful saturations?
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Post by Ethan Winer on Jan 13, 2019 17:26:25 GMT
Yes, it's all soft clipping. Unless it's hard clipping. That's why I made the Mojo Maestro, to prove that you don't have to spend $4,000 on some silly tube and transformer device to add 1-2 percent distortion. Now, there are subtle differences between tube distortion, transformer distortion, and diode/resistor distortion. Then again, tubes vary a lot, and so do transformers. So these are all more alike than different. As for your last question, that's what the variable resistor in series with the diode does.
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Post by Alex on Feb 10, 2019 23:46:06 GMT
You wouldn't have any finished Mojo Maestro boxes that you'd be willing to sell would you? I lost when it comes to building electronics but I would really love to own one for my projects
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Post by Ethan Winer on Feb 11, 2019 19:17:32 GMT
I have only the one unit I made, and I'm keeping that. But it's a simple project for you to build.
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Post by Michael Lawrence on Feb 11, 2019 23:42:56 GMT
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Post by Ethan Winer on Feb 12, 2019 17:13:30 GMT
Great idea Michael! I'm embarrassed that I didn't think of that.
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Trdat
Junior Member
Posts: 78
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Post by Trdat on Apr 12, 2019 17:50:00 GMT
Hey Ethan,
So we can put the Mojo between a pre and power amp of my home sound system and potentially get a tube feel?
Also, what do we get from the DIY recording equipment store? Just the circuit or all the parts?
Regards
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Trdat
Junior Member
Posts: 78
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Post by Trdat on May 6, 2019 20:17:05 GMT
Does anyone want to chime in here. I am very keen on this mojo mastro and would like to know if it will work inbetween a pre and power amp?
I also do need to add that I have a crossover in between the my pre and power amp and curious if it could possibly add noise or would it be insignificant?
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Post by Ethan Winer on May 6, 2019 20:22:16 GMT
Yes, it probably would be fine with those signal levels.
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