Dirty Little Monster
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- RJ Guitars
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Re: Dirty Little Monster
We've heard at least one indicator that a DLM was a hot-rodded plexi into a single ended KT88. It's likely that we will never know differently because it seems that there was only one, maybe two DLM's ever completed and only a handful of guys have ever seen one or know whats up with the circuit... so we can all take a stab at a best guess and have a lot of fun making up our own versions.
I sat down with a hand full of schematics last week and verified for myself... the preamp on the Rocket, the 59' Bassman, and the JTM45, they have a while lot in common and not much in the way of differences. You can consider those comparisons without much of a stretch to say that a Rocket preamp can be a contender for a "Hot Rodded plexi" front end... Thus the Rocket front end into a Single Ended KT88 matches up very closely to one of the few descriptions we've been given for a DLM.
FWIW and YOMV...
rj
I sat down with a hand full of schematics last week and verified for myself... the preamp on the Rocket, the 59' Bassman, and the JTM45, they have a while lot in common and not much in the way of differences. You can consider those comparisons without much of a stretch to say that a Rocket preamp can be a contender for a "Hot Rodded plexi" front end... Thus the Rocket front end into a Single Ended KT88 matches up very closely to one of the few descriptions we've been given for a DLM.
FWIW and YOMV...
rj
Good, Fast, or Cheap -- Pick two...
http://www.rjguitars.net
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Re: Dirty Little Monster
Thanks Rj,
I will put that on the To Do List!
I had already drawn up a schematic and a layout for a Rocket pre, a Liverpool pre, a Marshall 2204 pre and the Express pre...which I have built. Again not to copy Ken , but just to have some fun.
I will put that on the To Do List!
I had already drawn up a schematic and a layout for a Rocket pre, a Liverpool pre, a Marshall 2204 pre and the Express pre...which I have built. Again not to copy Ken , but just to have some fun.
Re: Dirty Little Monster
Fired up tthe AMP today, first off I am a bass player not a guitar player. I know a few chords and can play a little lead. Hey maybe I am a guitar player! Anyway my impressions of this amp are... Massive gain and overdrive available. Lots of Volume.LOUD! I used two 12AX7 and one EL34. I have a KT88 I am going to try as well as a KT77 and a 6L6GC I have read much about how with a TW you dial in the amp and control your vol from the guitar . Down ---clean, up--- high gain crunch. Well it does work just like that . Pretty cool. I will have to get one of my real guitar playing buddies over here to put it through its' paces and see what it really can do. I still have to put the lettering on and install it in a cab. Pictures to follow. I just wanted to get it working well first. I will get some clips up as soon as I can.
Next up a Rocket front end. Thanks RJ for all of your help.
Next up a Rocket front end. Thanks RJ for all of your help.
Re: Dirty Little Monster
mccracer,
I am anxiously waiting for pictures and further report on your amp, sounds like fun.
Mark
I am anxiously waiting for pictures and further report on your amp, sounds like fun.
Mark
Re: Dirty Little Monster
Ok guys here are a few pix. Still have not done the labels and final lead dress Tried a KT77, I liked the KT88 better. Still have not had a real guitar player jam it yet either.
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Re: Dirty Little Monster
One more
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- RJ Guitars
- Posts: 2662
- Joined: Tue Nov 14, 2006 3:49 am
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- Contact:
Re: Dirty Little Monster
Very Cool! I'll be looking forward to some clips and further reports!
rj
rj
Good, Fast, or Cheap -- Pick two...
http://www.rjguitars.net
http://www.rjaudioresearch.com/
http://diyguitaramps.prophpbb.com/
http://www.rjguitars.net
http://www.rjaudioresearch.com/
http://diyguitaramps.prophpbb.com/
Re: Dirty Little Monster
Nice, that KT88 sure dwarfs the rest of the small chassis.
Thanks for posting pictures, always fun to see.
Mark
Thanks for posting pictures, always fun to see.
Mark
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Re: Dirty Little Monster
is that a valve jr chassis? awesome!
Re: Dirty Little Monster
Yeah, I had a cheap source for them but that's over. Thanks guys. I used an Express preamp and so far there aren't any noise or hum issues nothing crazy. I must be lucky or blessed. OK Next up is the Rocket pre.
Re: Dirty Little Monster
Hmmm, makes me wonder if you have enough - maybe increase R7 to get a lil' closer to the ragged edge???mcrracer wrote:Yeah, I had a cheap source for them but that's over. Thanks guys. I used an Express preamp and so far there aren't any noise or hum issues nothing crazy. I must be lucky or blessed. OK Next up is the Rocket pre.
Re: Dirty Little Monster
Hey ZippyZippy wrote:Hmmm, makes me wonder if you have enough - maybe increase R7 to g,mcrracer wrote:Yeah, I had a cheap source for them but that's over. Thanks guys. I used an Express preamp and so far there aren't any noise or hum issues nothing crazy. I must be lucky or blessed. OK Next up is the Rocket pre.
et a lil' closer to the ragged edge???
My Express schematic does not show circuit designations. Where is R7 and what values would you suggest? The soldering iron's HOT!
Re: Dirty Little Monster
I was referring to the components as labeled in http://ampgarage.com/forum/files/tw_exp ... 08_334.pdf .mcrracer wrote:Hey ZippyZippy wrote:Hmmm, makes me wonder if you have enough - maybe increase R7 to get a lil' closer to the ragged edge???
My Express schematic does not show circuit designations. Where is R7 and what values would you suggest? The soldering iron's HOT!
R7 is padding down the signal level between stages II and III. As RJ and I have been playing with turning the Rocker 66 into a test bed, I have become fond of the idea of adding trim pots on the board to dial these things in. I would suggest adding a 250k trimpot in series to the 150k resistor. Take a look at RJ's latest pics of the revised Rocker 66 for an idea of how to implement the trimpots.
http://ampgarage.com/forum/download/file.php?id=8141
If you are not into trimpots, I'd up to R7 in the range of 250k to 500k.
Re: Dirty Little Monster
Thanks Zippy, I will experiment and see what happens.
DLM tidbits found on internet
Dirty Little Monster voltages and topology [class B single ended EL-34 output with real high voltages--like above 450VDC].
Also, I was told that this clip is a DLM on the solo:
http://postpunkbubblegum.com/audio/2ndBest.mp3
Also, I was told that this clip is a DLM on the solo:
http://postpunkbubblegum.com/audio/2ndBest.mp3