Rockman X100 or Sustainor Circuit…

Caldo71

Active member
Reposting from the older, now-archived wishlist…
Where it seemed for a while there was some forward movement (a “Goat” was purchased) and then things seemed to sadly fizzle.

Also really want to re-iterate that although there is always constant hype around that hilariously cheezy trademark Rockman distortion sound, it’s the “CLEAN 1” tone that truly shines and remains über useable to this day. Would be a shame to leave that part of the circuit forgotten.
 
Upvote 3

thesmokingman

Paid Hater
give it time, the goat is marked as in-progress. guy's got a lot of product already to offer and requests keep coming in for more every day.
 

Caldo71

Active member
give it time, the goat is marked as in-progress. guy's got a lot of product already to offer and requests keep coming in for more every day.
Not really seeing the "in progress" flag on the archived thread for this project? Maybe I'm missing something there.

I wasn't unduly pushing @PedalPCB at all...just following his own request that we re-post wishlist items from the archived thread that had not been tackled yet!
 

PedalPCB

Admin (Robert)
Staff member
This isn't forgotten, it's just taken the back seat to a few other projects.

That looks cool, no I haven't seen that one before. I'll have to check it out.
 

Caldo71

Active member
Based on what I’ve read about this one it’s just…ok. Has the sound for the most part, but it’s not clear if it’s really a good interpretation of the sand circuit.
You guys are so coy can you please clue me in to where/what this project is?
 

Cybercow

Well-known member
Oh, do not tease…this looks phenominal. Where is this pic from…?…
I, along with two others in different parts of the world (Josh and Vivek), worked out all the particulars and built six prototypes using original Rockman X100 PCBs. We redesigned the switching to allow for sequentially cycling thru the the MODES and FX. It IS a genuine X100 circuit with the MN3011 and the two MN3007 BBD chips with a genuine 2N4339 JFET.

X100_Wired_01.jpg

We also improved the power supply, provided some control over the amount of compression, addressed the over-powering headphones output, balanced the MODE level differences, increased the inout trimmer to 100K allowing for a bit more volume and "tone" control, added a stereo output circuit to overcome the less than unity-gain output and got it all into a custom 8.3" x 5.5" custom enclosure. Now the MODE and FX switching can be address with stompswitches instead of reaching over to a slide switch as on the original. Over 400 individual bits, and 126 wires have to be hand-placed and soldered. It takes about 100 hours to fully assemble, tweak and set up one of these units.

Josh is working up a new PCB with SMD components for a "V2" version, using the same MN3011 & two MN3007 BBDs and the 2N4339 JFET. And due to the expense of the MN3011 BBD chips, V3 will be the same fundamental X100 circuit - but will use one or two FV-1 DSP chips to provide the FX. Hopefully, we can get V3 own to a 1590DD sized enclosure.

A butt-load of man hours has gone into the analysis and development of this project. Josh is the lead on this project. I provided the digital sequential switching, power supply and Low Level Stereo Output circuit And Vivek does all the math and circuit analysis wizardry. Josh and I do the actual building and hardware testing. All three of us are involved in the development of the FV-1 FX patches creation.
 
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Caldo71

Active member
I, along with two others in different parts of the world (Josh and Vivek), worked out all the particulars and built six prototypes using original Rockman X100 PCBs. We redesigned the switching to allow for sequentially cycling thru the the MODES and FX. It IS a genuine X100 circuit with the MN3011 and the two MN3007 BBD chips with a genuine 2N4339 JFET.

View attachment 27177

We also improved the power supply, provided some control over the amount of compression, addressed the over-powering headphones output, balanced the MODE level differences, increased the inout trimmer to 100K allowing for a bit more volume and "tone" control, added a stereo output circuit to overcome the less than unity-gain output and got it all into a custom 8.3" x 5.5" custom enclosure. Now the MODE and FX switching can be address with stompswitches instead of reaching over to a slide switch as on the original. Over 400 individual bits, and 126 wires have to be hand-placed and soldered. It takes about 100 hours to fully assemble, tweak and set up one of these units.

Josh is working up a new PCB with SMD components for a "V2" version, using the same MN3011 & two MN3007 BBDs and the 2N4339 JFET. And due to the expense of the MN3011 BBD chips, V3 will be the same fundamental X100 circuit - but will use one or two FV-1 DSP chips to provide the FX. Hopefully, we can get V3 own to a 1590DD sized enclosure.

A butt-load of man hours has gone into the analysis and development of this project. Josh is the lead on this project. I provided the digital sequential switching, power supply and Low Level Stereo Output circuit And Vivek does all the math and circuit analysis wizardry. Josh and I do the actual building and hardware testing. All three of us are involved in the development of the FV-1 FX patches creation.
I salute the three of you, deeply. This is amazing. I absolutely can't wait for this to become a reality.

So is the end-game purely to create a pre-built, "off-the-shelf" commercial product that people can buy? Or is the goal to create a kit for the DIY community? Or a little of both...?...
 

Cybercow

Well-known member
I salute the three of you, deeply. This is amazing. I absolutely can't wait for this to become a reality.

So is the end-game purely to create a pre-built, "off-the-shelf" commercial product that people can buy? Or is the goal to create a kit for the DIY community? Or a little of both...?...
The six prototypes, like shown in photos above, are already in the wild. V2 is in the final throws of testing and the first V2 build gets tested tonight. It (V2) will be a limited run of about 36 for those who pony up for them. V2 still has about 100 wiring points and several bits of user hardware to assemble. Josh has all the particulars on what may or may not be available for V2 acquisition. The goals for V3 are in the throes of final development and whether or not it will be made available as a set of pre-populated PCBs (the 2N4339 JFET and FV-1s not withstanding) is yet to be determined. Ideally, we'd make some for existing clients, and for those who insist on torturing themselves with a ~50+ page build document to assemble their own from the PCBs would be able procure PCBs and be on their own for all the supporting bits. But all this is just my take on it as an inside developer, builder & tester. I am not the project lead. So what I've said so far may or may not come pass with regard to V3.
 
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