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Ceriatone / Overtone / Re: Dumblelator vs. Kleinulator
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on: January 21, 2010, 07:15:49 PM
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...... a quad op-amp chip for $1, op-amps make fine buffers.
Rember to use a higher (than 9v) voltage supply, though. Often OP-Amps are supplied with insufficient supply, causing them not to tolerate the voltage swing in a tube amp without clipping. They're fine at bedroom volume, but wont stand up at gigging volume. The Klein-ulator that use FETs has a voltage tripler, turning 9v supply into something more useable. Are you talking 27 VDC? Like +-13.5 VDC??? You need that much of a voltage swing? I was thinking these were more like "line level" voltages. Supply voltage shouldn't effect the "slew rate" of an op-amp that much, within the limits of the input voltage. Sure they'll clip as you approach the supply voltage, hopefully you'd never come close. |
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47
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Ceriatone / Overtone / Re: Built in Kleinulator
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on: January 21, 2010, 07:10:42 PM
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Here's a picture of the build a week ago. It's fitted in a old Peavey Classic VT chassis. So plenty of room.
That's a long head alright. I take it the right most socket is for a 12AX7 to buffer the effects? BTW, which "Dumble" schematic are you using for this? |
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48
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Ceriatone / Overtone / Re: Built in Kleinulator
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on: January 21, 2010, 07:08:53 PM
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HOWEVER, if an OTS had such a recording output, to be feed into a stereo effects processor, would there be a need for a Dumbleator at all? Maybe, I'm not familiar with the inside of the Mark IV; I'm very narrow minded, only dumble so far and a Fender.  Erwin, if you've ever seen Larry Carlton live, he places a microphone in front of his (100% dry) Dumble. The mic's output goes to stereo processor, then into the board. In essence, he did away with a need for an effects loop. My idea of a RECORD output would be similar, but silent, and no microphone. Just a dry signal off the speaker terminals would be sent to a processor. That's how the Boogie Mark IV works, and it works very well. |
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49
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Website, Store / Suggestions / Re: Overtone Recording Preamp
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on: January 21, 2010, 05:13:10 AM
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If you can find the right tool, just build it yourself, the resources for the preamp and parts are easily available, just stop before you reach the PI, and quit whining for your own highly specialized swiss army knife.
Wow that makes so much senseless. I just showed you 2 commercially available PREAMPs with stereo returns. VooDoo Labs isn't a big company, yet they do it. Apparently there's many people in this world who need swiss army knives. City kids wouldn't know. They see as far as their block. Another solution is to make a LINE OUT taken from the speaker output, using the speaker itself as "emulation". That in turn would feed a stereo processor. Many companies do this, including a very good one on a Boogie Mark IV. You see, people who haven't been worshipping Howard Dumble for 30 years are somewhat surprized at the primitive nature of his amps. It's like it's 1980, all over again.  You truly are as ignorant, as clueless and as tunnel-visioned as you seem. Good luck. Nik is too busy to offer a AB763 Fender because they take too long to build, I'm sure he'll rush right into designing superfluous options into your dream preamp. I'm sure he'll have a a prototyped PCB for you in a couple of years. You have offered your suggestion and you have mindless, stubbornly ignored all the great reasons why what you ask isn't worth making. By now you are just trolling. So, until you learn something about building and designing amps, or at least try and build on of Nik's kits, why don't you actually wait until you have a real problem or (haha) solution. "D Class?" Hilariously ignorant. You strike me as someone who wouldn't know Pulse Width Modulation from a Permanently Withered Moron. You might be able to describe the difference between a non-inverting vs an inverting amplifier stage. The concept of a virtual ground might be pushing things however. An AB763 too long to build you say? Geez, I better forget about the Bright Switch for both channels. A capacitor and switch might take years to add. Like it's 1980 all over again........, er, ah, 1965 for a DRRI. |
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50
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Ceriatone / Overtone / Re: Built in Kleinulator
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on: January 21, 2010, 12:20:13 AM
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Has anyone built in a kleinulator in an Overtone? I would`t care for more boxes and cables than necessary so I think it could be a good idea. How about adding a footswich for bypassing the loop and maybe a boost?
I've got several threads open on this already. No need to stir the pot extra. These guys are sensitive about the effects loop. I'd think there'd be room inside for an 8 pin op-amp and a cadre of resistors and capacitors. Hopefully there's space on the back panel for 3 knobs or so. I'd rather see another tube than the op-amp. I think most here would. I'm building a HRM with built-in dumblelator at this moment(not ceriatone), however your chassis has to be adapted to fit the thing. BTW, would a "long" head version of the chassis (a la Fender and Boogie) give you enough volume inside for the loop circuitry? |
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51
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Ceriatone / Overtone / Re: Built in Kleinulator
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on: January 21, 2010, 12:15:08 AM
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Has anyone built in a kleinulator in an Overtone? I would`t care for more boxes and cables than necessary so I think it could be a good idea. How about adding a footswich for bypassing the loop and maybe a boost?
I've got several threads open on this already. No need to stir the pot extra. These guys are sensitive about the effects loop. I'd think there'd be room inside for an 8 pin op-amp and a cadre of resistors and capacitors. Hopefully there's space on the back panel for 3 knobs or so. I'd rather see another tube than the op-amp. I think most here would. I'm building a HRM with built-in dumblelator at this moment(not ceriatone), however your chassis has to be adapted to fit the thing. BTW, erwin, I've an '91 Boogie Mark IV with a recording output, that somehow uses the speaker as "emulation", even though it shuts the speaker output OFF. Simple stuff to be sure, scale a line voltage from the speaker output.
HOWEVER, if an OTS had such a recording output, to be feed into a stereo effects processor, would there be a need for a Dumbleator at all? In other words, just send a dry signal to the processor, no loop in the equation. Might need an op-amp for a Record Out though. |
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52
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Ceriatone / Overtone / Re: Overtone rackmount PREAMP?????
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on: January 21, 2010, 12:09:42 AM
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OTS and all it's variations have nothing to do with class d.
Tell me kind sir, what is the origin of the misnomer? Is it some kind of H.A.D. insider joke? It's called D-style amp;abbreviation of Dumble style amp. Nothing to do with class D. Got ya! Usually Class D implies a switching amp, like these 500 watt babies that weight 5 pounds. Incredible they can do that. |
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53
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Ceriatone / Overtone / Re: Built in Kleinulator
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on: January 21, 2010, 12:04:32 AM
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Has anyone built in a kleinulator in an Overtone? I would`t care for more boxes and cables than necessary so I think it could be a good idea. How about adding a footswich for bypassing the loop and maybe a boost?
I've got several threads open on this already. No need to stir the pot extra. These guys are sensitive about the effects loop. I'd think there'd be room inside for an 8 pin op-amp and a cadre of resistors and capacitors. Hopefully there's space on the back panel for 3 knobs or so. I'd rather see another tube than the op-amp. I think most here would. I'm building a HRM with built-in dumblelator at this moment(not ceriatone), however your chassis has to be adapted to fit the thing. Yeah erwin!!!!! Was the extra tube section an extremely tight fit? If it all works out, kindly share the fruits of your labor with Nik. You could be up for a Nobel Prize, the real "Alexander" |
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54
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Website, Store / Suggestions / Re: Overtone Recording Preamp
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on: January 20, 2010, 11:59:06 PM
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If you can find the right tool, just build it yourself, the resources for the preamp and parts are easily available, just stop before you reach the PI, and quit whining for your own highly specialized swiss army knife.
Wow that makes so much senseless. I just showed you 2 commercially available PREAMPs with stereo returns. VooDoo Labs isn't a big company, yet they do it. Apparently there's many people in this world who need swiss army knives. City kids wouldn't know. They see as far as their block. Another solution is to make a LINE OUT taken from the speaker output, using the speaker itself as "emulation". That in turn would feed a stereo processor. Many companies do this, including a very good one on a Boogie Mark IV. You see, people who haven't been worshipping Howard Dumble for 30 years are somewhat surprized at the primitive nature of his amps. It's like it's 1980, all over again. |
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Ceriatone / Overtone / Re: Built in Kleinulator
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on: January 20, 2010, 01:43:43 AM
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Has anyone built in a kleinulator in an Overtone? I would`t care for more boxes and cables than necessary so I think it could be a good idea. How about adding a footswich for bypassing the loop and maybe a boost?
I've got several threads open on this already. No need to stir the pot extra. These guys are sensitive about the effects loop. I'd think there'd be room inside for an 8 pin op-amp and a cadre of resistors and capacitors. Hopefully there's space on the back panel for 3 knobs or so. I'd rather see another tube than the op-amp. I think most here would. |
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57
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Ceriatone / Overtone / Re: Overtone rackmount PREAMP?????
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on: January 20, 2010, 01:37:43 AM
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Look at the schematics. The power section has few significant differences from what fender or marshall has done.
So kindly tell me Mr Z, where does the "Class D" enter the equation? Supposedly Class D means some kind of pulse width modulation (PWM) in a feedback loop, correct? Are Nik's Overtones and real Dumbles truly Class D, or just "Class D like"? Not really. Nothing in the Class D definition states analog or digital. PWM can be used to modify an analog signal. PS: VooDoo Labs makes a nice rackmount tube preamp. I wish Nik would make something along those lines. OTS and all it's variations have nothing to do with class d. Exactly, Class D are digital amps. So yosemitespam , lower your guns and go back to school ;-) You gunslinger, You. |
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59
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Website, Store / Suggestions / Re: Overtone: tube buffered effects loop option
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on: January 18, 2010, 05:52:23 PM
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How does Boogie make a single space rack unit with 5 12AX7s with speaker emulation and tube buffered stereo returns?
PCB's yep, also the kleinulator isnt tube, and the tube version coming out will take up more space Perhaps some of the miniature tubes (6205) might save some space over a 12AX7? |
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