Wolfeman and other amp tech guys...
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MetalJonesy
more metal, more booze!!!
Metal Overload
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That would be really practical for live use and stuff, not that i´m to lazy to carry the little toaster, but the lesser the space it takes the better.
BTW Mike, Check your PM!!! got something for you!!
BTW Mike, Check your PM!!! got something for you!!
Well...having a power section (OT and power tubes) would kind of defeat the purpose of making it into a 1U rackmount preamp Marcus 
I want to make my Jr. into a preamp like the MP-1/e530/TriAxis/etc.
I can make the chassis myself, I'm very handy with metal work. I'm good with electronics, not a genius that can spout off info left and right but if you give me a schem I'll know my way around it. I'm just wondering what it would take, what power supply I would need, would the FX Send or Line Out that is already there be good enough for the output or should I find a way to add some dedicated outputs for going to my interface to use with impulses? The rest I think I can manage.
I need to get ahold of a schematic for this thing, I bought mine 2nd hand so I didn't get a manual but I think it's downloadable from Krank...dunno if the schem is in it or not though.
~006
I want to make my Jr. into a preamp like the MP-1/e530/TriAxis/etc.I can make the chassis myself, I'm very handy with metal work. I'm good with electronics, not a genius that can spout off info left and right but if you give me a schem I'll know my way around it. I'm just wondering what it would take, what power supply I would need, would the FX Send or Line Out that is already there be good enough for the output or should I find a way to add some dedicated outputs for going to my interface to use with impulses? The rest I think I can manage.
I need to get ahold of a schematic for this thing, I bought mine 2nd hand so I didn't get a manual but I think it's downloadable from Krank...dunno if the schem is in it or not though.
~006
Metal Overload: Yeah man, saw it, looks cool - running it by the other guys as soon as they get online to get comments from them, etc.
~006
~006
Well...having a power section (OT and power tubes) would kind of defeat the purpose of making it into a 1U rackmount preamp Marcus
Haha, yes yes, I understand that - but I meant, what are you going to do with the power section? Just scrap it? Maybe you could rackmount that too...
Hmm...good call actually that is pretty interesting. A 20W tube power section might be useful. Make a chassis for that and put it in the rack! Good call Marcus! 
~006
~006
Metal Overload
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Yeah i was thinking that too and i think it fits right in the rack chasis, and well, that way you have an actual amp in a very small space, which i find it really really helpfull, specially when you have travel to a gig, and you found some 90´s crate 15w combos.
MetalJonesy
more metal, more booze!!!
theres no schematic in the manual, the krank manual is crap!!! all i got was 2 sheets of A4 explaining each part of the REV JR, the manual on the krank website doesnt include the Rev Jr from what i remember!
Yeah, Krank seems to have the shittiest service as far as documentation and info about their products goes 
They need some lessons from Mesa Boogie, who right bar none the greatest manuals I've ever read!
They need some lessons from Mesa Boogie, who right bar none the greatest manuals I've ever read!
slashvanyoung
Dopefish lives!
I didn't even get THAT...
All I've got is this little postcard thing with suggested settings for various styles and a reference to their website... saying Revolution Series One on it. It wasn't even meant for the jr...Also, if you click on "Krank manual" at their website, you'll get their catalog, while the link to the "real" - laughable - manual is hidden somewhere under faq or something. :Smug:
Yeah and it's one "manual" for all their amps, separated into Rev, Krankenstein and Chadwick...
That's something they should really work on.
Edit: A dedicated manual for the Rev jr doesn't even exist.. lol
MetalJonesy
more metal, more booze!!!
anyone want the Krank Rev Jr 'manual' what i got sent?
i can scan it and put it in PDF, its just text explaining each bit of the amp??? at least it refers to the Krank Rev JR
i can scan it and put it in PDF, its just text explaining each bit of the amp??? at least it refers to the Krank Rev JR
MetalJonesy
more metal, more booze!!!
Hell, I'd be interested, and I don't even own one!
its very very plain and boring, its the only thing though that ive seen that details the amp!
Wild Hades
Clean channels are for pussies
Well...having a power section (OT and power tubes) would kind of defeat the purpose of making it into a 1U rackmount preamp Marcus
I can make the chassis myself, I'm very handy with metal work. I'm good with electronics, not a genius that can spout off info left and right but if you give me a schem I'll know my way around it. I'm just wondering what it would take, what power supply I would need, would the FX Send or Line Out that is already there be good enough for the output or should I find a way to add some dedicated outputs for going to my interface to use with impulses? The rest I think I can manage.
I need to get ahold of a schematic for this thing, I bought mine 2nd hand so I didn't get a manual but I think it's downloadable from Krank...dunno if the schem is in it or not though.
~006
Interesting, but depending on the pcb board, it could be very complex...
I don't get if you want to totally get rid of the pcb and just keep the components and then create a new layout, or if you want just to rip it out as much as possible and make a new preamp using part of the same PCB...
About the power supply, what kind of supply transformer does the Krank Jr have? If it's not toroidal (max height 4cm if you want it to fit a 1U rack) you should measure the output voltages and buy a similar one somewhere (or ask a custom one to some company). Guess Krank have voltages around 300V AC on the trafo...
Since it is only a preamp you're going to need a small amount of amperes for the plate supply... 20mA could be more than enough, depending on how good the supply trafo is and how much tubes you need (guess 2 since Krank doesn't seem to use cathode followers to drive the tonestack)...
You can also keep the filtering caps values from the original...
I think I could help you since I have some experience on the subject, but to give you some suggestions I need more infos about what you really want to do with the Krank circuit...
Right on, yeah I don't want to redo anything, just take the existing circuit/layout/pcb and get rid of the tube power section and OT. Leaving me with the preamp and some outputs and all the other goodies so I can fabricate a 1U chassis for it and use it as a preamp like an Engl e530 et al. To utilize the power section and transformer that would take some time because I would have to have a new board and wire it all up, as well as fabricate the chassis. The main goal is to make a preamp unit that is the Krank sound 
Without a schematic of the Rev Jr., there isn't much to go by. I'm working on getting a schem right now though, been e-mailing Tony Krank back and forth about Krank making a Rev preamp as well as me getting the schem to try a DIY one...no response on the schem yet though.
~006
Without a schematic of the Rev Jr., there isn't much to go by. I'm working on getting a schem right now though, been e-mailing Tony Krank back and forth about Krank making a Rev preamp as well as me getting the schem to try a DIY one...no response on the schem yet though.
~006
From looking at pics, though, isn't the power transformer on the Rev Jr. bigger than 1 RU in all dimensions? Or would you just have it hanging out the back?
Wild Hades
Clean channels are for pussies
I doubt that they'll send you the schemes...
Apart from that, you should check how the whole circuit looks like first, because if tubes are soldered vertically on the main preamp board, then you can easily forget to make a 1U rack preamp using that same pcb, simply because that would be higher than 4cm...
Apart from that, you should check how the whole circuit looks like first, because if tubes are soldered vertically on the main preamp board, then you can easily forget to make a 1U rack preamp using that same pcb, simply because that would be higher than 4cm...
2U would be fine with me...
I'm just wanting to make a Krank Revolution rack preamp. That's the idea, pretty simple. Hades, I can take some pics of the Jr. tonight, would that help? I thought finding a power supply would take care of the power transformer issue? Or is that incorrect?
Still waiting for Wolfeman to chime in, I'd like to hear what he has to say as well.
~006
I'm just wanting to make a Krank Revolution rack preamp. That's the idea, pretty simple. Hades, I can take some pics of the Jr. tonight, would that help? I thought finding a power supply would take care of the power transformer issue? Or is that incorrect?
Still waiting for Wolfeman to chime in, I'd like to hear what he has to say as well.
~006
