Umble is a FET-based emulation of a certain very expensive amplifier...
Article, schematic, and PCB/perfboard layout: http://runoffgroove.com/umble.html
Sound clips: http://runoffgroove.com/salvo.html#umble
8) That rocks!
Great Job guys!!!!
Much appreciated!!!!
Peace!
Arn C.
I been waitin on this 1 Mr B, can't wait to add it on to the T.R.O.G.G, My part's may be in this week so you may get some build reports from me very soon,
Thank's for yet another
JD
Nice........someday I'll be able to catch up on building all of these!
(Any hints on what the last emulator will be?)
Quote from: Bucksears(Any hints on what the last emulator will be?)
The Umble is our last entry in the FET-based amp-emulator series at runoffgroove.com
It's been a lot of fun and we've learned quite a bit, but it's time for us to take a short vacation and move on. Our goal was to help others learn the conversion process, while producing several examples of the more popular amps. Of course, we'll be happy to help others with their FET-based emulations.
Thank you to everyone for their feedback and enthusiasm! None of our emulators would exist without this forum and its members.
Hey Mr. B,
It's Us Wee Guy's here that owe our Gratitude to GUY'S Like You'all for letting us enjoy, :D :D :D :D :D :D
My Thank's to all you GUY'S,
JD-
How hard would it be to convert these things for use as preamps? I can see tossing a bunch of them into a rackmount unit then pairing it up with a good tube poweramp. Sort of like the Duncan Convertible.
The tone stack is more of a cross between a Vox and a Fender. Vox layout with Fender values. HIGHLY interactive, in the sense that it seems one knob doesn't do anything (like the mid knob) until you get the bass or treble knob in a certain range. Or if you dial in a nice sound but think "hm, it could use a touch more bass" and turn the bass knob up a bit - no change, until you turn down the treble and mid knobs. Weird stuff like that. This interactiveness makes dialling in a lot of different sounds possible, but it's not a quick process. I strongly suggest writing down or taking notes on the tone stack combinations that work for you!
Incredible!!!
Quote from: B Tremblay
It's been a lot of fun and we've learned quite a bit, but it's time for us to take a short vacation and move on.
i hope this doesn't mean you 'll stop doing emulations in the future... :D
thanks a lot for all of your pedals they are great...
I've never heard a Dumble being put through the paces on its own, but even if it doesn't sound exactly like one, it is one cool-sounding pedal. Lots of tones in there for sure.
As for pursuing other projects (and a vacation, which you guys deserve) I'm excited to see what you come up with. Now we have a cornucopia of amp sounds to pursue, and I can't really think of another classic amp I'd like to hear except for maybe a Hiwatt 'Live at Leeds' pedal.
Anyway, rock on guys and despite the claims that you are putting out too many projects to keep up with, keep 'em coming!
Quote from: PB WilsonI can't really think of another classic amp I'd like to hear except for maybe a Hiwatt 'Live at Leeds' pedal.
Disregard the above quote. I just read the "Runoffgroove request" thread and this was dealt with down the page.
Quote from: B Tremblay
The Umble is our last entry in the FET-based amp-emulator series at runoffgroove.com
It's been a lot of fun and we've learned quite a bit, but it's time for us to take a short vacation and move on.
Mr Tremblay, what r u going to move onto :P
WoW!
Got to run at the el-shop when the morning comes. Very good soundclips :shock:
One beginner-question:
Are the bass, treble and master pots logarithmick and the middle linear ?
Thank You,
mat
Quote from: B TremblayUmble is a FET-based emulation of a certain very expensive amplifier...
Article, schematic, and PCB/perfboard layout: http://runoffgroove.com/umble.html
Sound clips: http://runoffgroove.com/salvo.html#umble
Quote from: matAre the bass, treble and master pots logarithmic and the middle linear?
Yes.
All Right!
Thank You for the very fast reply :)
mat
Quote from: B TremblayQuote from: matAre the bass, treble and master pots logarithmic and the middle linear?
Yes.
Mr B, Gary, Comgratulation's, you win the Ceegar on this 1, I been on Stage teching for Mr. E.J. and i'm gonna tell ya, if ya had the delay and reverb set like Eric does it, you woulda nailed his tone through that Randal amp, I love it, that's incredible, I just now got around to listening to the MP3 and i was very suprised at what I heard, you know what they say," Save the Best for Last ", 8) 8) 8) 8) 8) 8) 8) 8) 8) 8) 8) 8)
JD
Thanks, JD. EJ is one bad cat! I wish I had half his talent.
Sounds great, I think I have to build some of your pedals, but I've got a few questions:
Are these pedals inteded for:
use in front of a clean guitar amp,
beeing plugged into a power amp
or directly into a mixing-desk :?:
Anybody tried using BF244s or BF245s instead of J201s ?
If yes what worked best: gain category A,B or C?
Thanks for your work ! :wink:
Michael
Quote from: Michael Weidenauer
Anybody tried using BF244s or BF245s instead of J201s ?
If yes what worked best: gain category A,B or C?
I have not tried any of those ROG-amp simulations yet, but used some fets in some other experiments... BF245C is not good... or it might be that it is not that good when running on 9 volts. A's could be better but I'm not sure as my local suplier does not have those. They have BF256A instead and it works but does note have huge gain but enough for some stuff. BF256 should be similar to BF245 (actually BF245 is newer replacement for BF256) so I guess BF245A could be usefull.
I built the thunderchief.
I tried o use the BF245A but could not get them working.Bias problem at Q3.
The ROG emulators are for in front of a preamp use. But I use my thunderchief as a preamp and go directly to the Poweramp. I removed the two Lowpass Filters to get enough treble.
They are no direct recording devices.
Eddie
What a pedal!!
I got it ready and while a have some gain problem this pedal is superb. Lots of my fawe guitarists use dumble amp (carlton, ford, Johnson) and after i tried it the feeling was unbelieveable. I played this thing (not boxed yet) for hours (self made strat and Princeton reverb). Very nice harmonics. I like the feel of gain and clear sound together, hard to describe.
I do not get the gain of the wonderful soundclip of runoffgroove web site. I have now a 220pF between the volume and treble pots (should be 47pF i think) - i dont know if it is that that eats the gain.
Just wondering what kind of art works should be included to the box...hmmmm..i just want to play little more before i box this....
Thank You,
mat
:D Thank You Elektrojänis , Thank You Eddie!
I think I'll give the BF245A a try (it worked very well in the Mini-Booster) when I find the time for it. Still don't know if I'll go for the Umble or the Matchbox or ... All these Apms are nice!
Michael
I can't wait to build this!
Those clips sound fantastic and ... unique. Is it the tone stack that gives it that distinctive sound in the midrange? I've considered modifying the 'normal' channel of my super reverb to the dumble tone stack just for shits and giggles.
You could have called it - "Ever so Umble". I've a mind to try some "2N4302s I bought and never used - good enough for EH, good enough for me>
Or Umble Pie??
"very `eavy" ?
Hey guys, Fret Wire just pointed a mistake at the pcb transfer, which i have already corrected, and sent the new pdf to Brian at ROG.
My apologies :(
Corrected version is up!
Quote from: Ed G.Is it the tone stack that gives it that distinctive sound in the midrange? I've considered modifying the 'normal' channel of my super reverb to the dumble tone stack just for shits and giggles.
Yep, it's the tone stack that does the mojo. Be careful with the knobs, though. They get hyper-sensitive at certain points. It's not a pot taper issue, they just interact VERY much at different points. You must tweak carefully to get the sound you want. Sometimes it seems like the mid knob does nothing. With other settings of the treble and/or bass knobs, the mid pot is overly active. It's odd, but worth playing with, since it is so different sounding. My vote is for you to modify that Super! You can always change it back.
I'd love to see a simulation of a mesa boogie dual rectifier if you haven't done so already... :)
So am I to assume you use these simulators as an effect pedal?
How do you compensate for the preamp stage of the amp you are actually using???
Thanks...
John
I got the gain issue of the Umble solved with help from elektrojänis ! Big thanks to You :P It was a .998k resistor in the input in place of 998k resistor (as my dmm shows them). I noticed the problem when turning the guitar volume from 10 to 9, then the volume dropped very quickly + the pedal did not work with other effects (wah,comp.). Now it works just wonderfully. I have to find somewhere those number scales for the pots to write down exact settings of the pots because this thing is hyper sensitive when tweaking the knobs. There are lots of good sounds hiding in there !!
Thanks again for the tip :D (suurkiitokset :wink: )
mat