Dumble Tone Stack Schematic

Too much lower frequencies, and its just too mushy and compressed. Slightly different than the "Tone Stack" used by Fender, Marshall, etc. It features 100w of 6L6 Power (1/2 power available of course). Tone Bone Score: 4. With 30 watts, it's loud enough to use on my gigs. The amp itself is a Dumble Style that Mark is universally famous for. Supreme Mod Kit - for MIM Amps: Guitar & Bass Amplifiers & Preamps - Amazon. The most popular amp is the jazz voicing, which is based on Robben’s Dumble #102 circuit. Compare Dumble style clean to blackface I'm interested in the characteristc tone or voice of the cleans. I'll be starting on my own as soon as possible! This means that the clean channel tone stack and gain stages "cascade" into the gain stage of the overdrive channel, lqyout the layojt channel to become "overdriven". Lastly, there is the caliber of Dumble's clientele. The schematic diagram of these components looks like a "stack" when drawn on a piece of paper. Amplifier and amplifier modification kits. We do get quite a lot of e-mails from folks asking about how they should set their tone controls on their amps and/or pedals. Development of the power amplifier culminated in the design pictured in Figure 4. The Tone Mister Kemper Profile Pack from Tone Junkie captures the tones from the 100 watt 6L6 tube amp known for it's surprises under the hood. ) Normal ch. Satisfy your Dumble Desire with an OSD from Trinity Amps. Here’s a link to an excerpt from the RCA Receiving Tube Manual. I think you could get Fenderish cleans and still have a mid-boost switch and a PAB switch that would head you into Dumblish overdrive tones. They take quite a bit of time to build and they have to be built correctly to sound right. Switching options include Bright, Deep and Rock/Jazz swtiches. BYPASS - Effect in/out - True Bypass - also controls the input to the Cab Simulation circuit either the direct input from the input jack (when bypassed) or the output of the DumBox preamplifier circuitry (when engaged). Please do NOT email me asking for schematics that aren't listed. This is what really makes the Dumble circuit attractive to me. Single channel 100 watt head with full Tone Stack, Presence, MV with push-pull feedback disconnect. The big holdover in the marshall amps from the 5F6A that was lost in the later fender amps was the cathode follower driving the tone stack. I like the tone but don't care for the feel. TC Sustain + Parametric EQ (modified) – Factory schematic with switching and buffered bypass circuitry removed. From Fractal Audio Systems Wiki. Dumble also occasionally makes a tube-buffered external effects loop called a Dumbleator. I'm just after what other peoples experiences with speakers that suit a dumble type circuit but feel free to ask your own speaker related questions. AB763 Blackface Amp Modifications. 22 watts with 6V6 or 33 watts with 6L6. So you'll need to download the FREE Adobe Acrobat Reader via the link below to be able to view schematics. The tone controls stay in the circuit and affect the sound. The Bassman-style tone stack serves two purposes: to compensate for the treble and bass attenuation that inevitably occurs at each stage of amplification and to allow the guitar player to adjust the frequency response using bass control R B, middle-range control R M, and treble control R T. Increasing the 100k slope resistor to 150k seems to make the tone stack work more effectively, and you can also try replacing the audio taper 250k treble pot with a linear taper 250k treble pot. Telle était la légende de Monsieur Dumble (d'ailleurs, certains s'intéressent parfois à la réalité même de son existence) qu'il se permettait de choisir ses clients (en somme, même si vous aviez les 100 K$ requis, Dumble pouvait très dire qu'il n'avait pas envie de vous céder un de ces bébés) et de leur imposer des CGV draconiennes. So, what does it sound like? Imagine a blooming, euphoric-sounding tone cascading into a hot-rodded, British-style tone stack. BYPASS - Effect in/out - True Bypass - also controls the input to the Cab Simulation circuit either the direct input from the input jack (when bypassed) or the output of the DumBox preamplifier circuitry (when engaged). What is the BEST Dumble KIT the name of a second tone stack that is only dedicated to the OD channel. Simply Roll-off Tone Stack F. Fortunately, Fuchs can change my switch from affecting the verb, to defeating the tone stack. And you have to know the circuit exists so you can play to its strengths. Green/Matamp Amp Simulator: This one is very similar to the Orange amp emulator with a slightly different tone stack that is post gain stage (the Orange's tone stack is pre-gain stage). From Fractal Audio Systems Wiki. Tone Stack Bypass or "Raw Switch" This is a great mod for pretty much any amp with a TMB (treble mid bass) tone stack. The myth shit goes into overdrive. The first tube triode is followed by a passive tone stack with controls for Treble, Middle, Bass and Volume. > I"Talkinig Blue Tone" Dumble used to name his tone circuits IIRC. Because this type of tone stack really loads down the guitar signal being able to eliminate the tone stack is a valuable option. amp's tube power amp, dummy load, and solid-state power amp. This design is known for its fat and harmonically rich clean tone, and a complex, smooth overdrive tone with a nice mid range push. Tone stack boost is virtually ruler flat so there is a lot of everything. The Dumble tone stack is basically an Fender/Marshall tone stack with lots of switches added which shift the frequency response in various ways. I ordered the Overtone Special from. The amp itself is a Dumble Style that Mark is universally famous for. Could this be the first incarnation of this now famous design?. One of the many apparent differences between The Twin and most Marshalls is the part of the circuit known as the tone stack. The "clone" project continues, albeit a little slower over the holiday weekend due to playing Friday, Saturday and Sunday night. Love this amp so much - one of the best D-style amps I've heard. The new Fuchs ODS HRM is heavily influenced by the 90's Dumble-style circuit architecture, and adds a unique, very flexible internal post overdrive tone stack, which provides a full range of adjustment for high, midrange and lows after the overdrive stages. This is actually an excellent question! Part of the reason the classic Marshall Amplifier sounds the way it does is due to the way that tone stack is set up. Dumble Mods. It seemed the issue wasn't the tubes but could quite possibly be the design itself, so I began to consider which of the BillM Audio Blues Junior mods would be worth trying. With the boost switch, the 5150 Overdrive can be kicked into high gear with extra compression and. They take quite a bit of time to build and they have to be built correctly to sound right. This Gibson Goldtone GA-5 might just be the best sounding GA-5 around. It features the “HRM” tone stack which has the ability to dial in a bit more gain than the standard D tone stack (HIGHLY desirable). Life is also simple when you come to change the output tubes, as the circuit uses a self‑biasing, cathode‑bias topography, which means you simply drop in a new pair of tubes and carry on playing. The treble circuit is first in the tone stack. The boost switch on the foot switch removed the first tone stack from the circuit, giving a volume boost, and a boost to the mids going into the dirt section. For starters I would try 330pF to 500pF for the. I have a schematic and layout for the dumble ods and got to thinking what would the tone stack and switching options do for a standard ab763 pre-amp circuit. I was able to have the drive knob adjust frequency responses in various places in the circuit. Of all of these, the tone stack probably has the greatest effect on the sound. Don't let the 5W rating fool you - when it's cranked it's a loud amp. Old Marshall Super Leads and Bass amps really only differed in the tone controls, yet the amps have completely different sounds. The amps consist of a Mesa Boogie Mark I, Dumble Overdrive Reverb and more recently a Bludotone amplifier. Getting Started All the files at Schematic Heaven are in Adobe Acrobat form. amp's tone stack and Gain distortion. HRM stands for Hot Rubber Monkey one more Dumble creation. Whether you are looking for a real Dumble amplifier, or a clone, or. Poring over my own notes and schematics as well as speaking with colleagues that have had experience with these circuits over the years, we decided that it probably has a very early version of the "skyline" pre, though the tone stack more closely resembles one of earlier examples. The clean channel has an entire new boost circuit. I have built 2 Strokes, pretty much by the book. We used the gain stages from the '70s ODS model and the tone stack from the front section of the '97 ODS model. The signal comes in, hits the treble capacitor, then, in place of a single resistor to complete a high-pass filter, like a neat little component on a circuit board, it instead sees the combined resistance of all three pots – the Treble, Bass, and Middle pots – which lie in a row between the. Steel String Singer). The Supervibe comes with two double foot swith boxes. The ODS-HRM tone is not everyone's cup of tea. Unlike the tone stack bypass boost on the other Shiva model this boost has a separate gain stage which brings this channel into Plexi territory when boost is engaged. A 1 meg resistor is not an open circuit, therefore the two channels are connected and a part of the signal is always going to the three grounds. (Paper copies are accepted as well, just ask for a mailing address). The schematic is: I will build it and play with it for awhile to see how it sounds, I will use the 12AX7 tubes from my old Houston integrated amp instead of the stock tubes that it comes with. This model has been refereed to as a high-plate non-HRM model with the Skyline tone stack. Dumble Ods AMP, SSS Amplifier, Electric Guitar Amplifier manufacturer / supplier in China, offering 1983 Dumbles Clone Ods Overdrive Special Handwired Point to Point Guitar Amplifier Head 50W, 5f1a Champ Handwired Guitar Combo Amplifier 5W (G-5), Single-Ended Classic a Champ Handwired Vacuum Tube Guitar Amplifier Combo 5W and so on. The Dumble tone stack is pretty responsive. Many users insist that a Dumbleator is required to obtain the optimal sound when using effects boxes and pedals. We really like it through EV12Ls, Celestion Vintage 30's or Greenbacks and it sounds HUGE thru a 2 or 4 - 12 cab. Plus, I remembered that I wasn't constrained by the real world. Dumble also occasionally makes a tube-buffered external effects loop called a Dumbleator. It features 100w of 6L6 Power (1/2 power available of course). are all critical to the overall sound. Rockett Hot Rubber Monkey packs the sound of the most special D-style amp model — with the popular HRM mod — into one of the most expressive overdrive stompboxes you’ll ever hear. Reverb controls are in the back. The boost switch is similar to the Dumble boost switch, giving a mid boost by sending the tone stack through a resistor/capacitor combination to ground. If you would like this kit assembled for you by one of our techs, you can email your request HERE. An active Mid provides stronger response than the usual passive mid control. The amp itself is a Dumble Style that Mark is universally famous for. The Supervibe comes with two double foot swith boxes. These circuits seem to have what`s termed the 'classic' tone stack. It is very different and takes a little while to get the hang of dialing in certain tones, but it makes the amp very versatile as far as what you want it to sound like. It has a SS/Tube rectifier switch, and a new tone stack. The preamp tubes go too asymmetric for midrange frequencies. He changed the Carr's gain boost switch to a Dumble mid-boost that is footswitchable and he put an on/off switch on the bass knob and when its turned off it goes into PAB (preamp boost) mode bypassing the tone stack for pure gain which is a dumble on "11" feature. Life is also simple when you come to change the output tubes, as the circuit uses a self‑biasing, cathode‑bias topography, which means you simply drop in a new pair of tubes and carry on playing. The boost switch is similar to the Dumble boost switch giving a mid boost by sending the tone stack through a resistor/capacitor combination to ground. Tone Stack Calculator Download Here Schematic Donations Please send them in the highest resolution possible, preferably in. In a sense, the overdrive channel sits "on top" of the clean channel. To my knowledge only us (Vertex) with the Steel String Clean Drive and Rockett (with the "Lenny") have attempted to go after the Dumble Clean Tone (i. I decided to do some re-design on the Bad Dog based on customer input. com FREE DELIVERY possible on eligible purchases. Monetary Donations. See more ideas about Guitar amp, Guitar rig and Guitar. Ask the Experts. The amp itself is a Dumble Style that Mark is universally famous for. The more I look at this, the less that I like it, and it will get rewired tonight (July 12). 63 Cameron Ccv 1A Cameron CCV100 (Ch 1: Clean) An amp its creator Mark Cameron calls “one pissed off amp. The big holdover in the marshall amps from the 5F6A that was lost in the later fender amps was the cathode follower driving the tone stack. There are two mini toggle switches on the front panel for Mid Boost and Rock/Jazz and the Volume control can be pulled out for a brighter sound. I was able to dig into the low pass and high pass filtering before each of the gain stages. The whole idea around adding the boost circuit started because I had an unused triode, then I got to thinking about how much I liked the way a pedal drove the front end of a standard amp into a mean overdrive, rather than like a Dumble where the boosting circuit is later on in the circuit and built in as an integral part of the amp design for a. Oh, and it’s a little tone monster too. Plus, you can shape tones post-distortion via another 3-band tone control and additional gain and level controls. are all critical to the overall sound. AB763 Blackface Amp Modifications. A quick disclaimer: NAMM isn’t an optimal environment for thoroughly evaluating gear. The Mark IV uses the same basic circuit as the very first unit, now boasting standard spring reverb, award-winning bias-vary tremolo, and a cathode-follower powered tone stack that retains the original's sparkly character. Code of conduct. The picture above was taken after completion of the tone stack wiring. Didn't Mesa do the same with their Subway amp or something? Actually, it's interesting to compare Mesa against Dumble, or rather the ap. The one I copied used EL-34s, Marshall transformers and Marshall tone stack. The Blackbird™ is a genuine all-tube preamp in a pedal! This tube tone engine is specially designed to give guitarists access to a wide palette of exceptionally classy guitar sounds whether recording direct to computer in the studio or when used with a tube amp in a live situation. This color scheme turned out great!. BOOST FOOTSWITCH - this, like the works of Alexander Dumble, bypasses sections of the tone stack to give a bolder present tone. com used to have some awesome pages on various circuit analysis stuff, but he just put out a book with those and more so it looks like they've all been taken down. It has very minimal power filtering, low plate voltages, elemental tone stack, and does next to nothing to control the low end between gain stages, not to mention the under-rated output transformer and speaker. This allows the flexibility of being able to boost or cut bass and treble. Then it finally became a AX84 lead circuit, but with a 6SN7 as 2nd tube, instead of 2 12AX7's and a few Dumblish caps across V1B and V2a. Tone Stack Bypass - Turn the tone knob all the way counter-clockwise or just step on the Boost footswitch, and remove the whole tone stack from the circuit to get a "guitar-straight-to-master volume" path that is clean and powerful. This circuit has been used in every stereo system since the 70’s for good reason and as a result there is plenty of information readily available. In a sense, the overdrive channel sits “on top” of the clean channel. We think the Rowin Analog Dumbler Pedal is the best dumble pedal if you are looking for a Dumble amp simulator, which does a really good job replicating the classic overdrive sound. AB165 circuit which is very crunchy and bright. Double the number of el34s but with a half power switch that let me cut 2 tubes out of the circuit. The classic Marshall Tone stack tends to emphasize the upper mids, which in turn tends to drive into distortion sooner in that layer. This amp simulates an authentic Dumble Overdrive tone. It features 100w of 6L6 Power (1/2 power available of course). So the recent Fender Custom Deluxe '68 Silver Face amps advertise that the "Custom" channel on the left has a "Bassman tone stack. Schematic can be found here. The schematic diagram of these components looks like a "stack" when drawn on a piece of paper. 8k Middle tone resistor's) ground. - Mesa Boogie Amps (primarily the early ones) - Dumble style amps (at least the clean section; some clones that follow the Dumble HRM schematic have a tone stack in the OD section too but it doesn't have a recovery stage like the clean section. Dumble Overdrive Special Circuit >>>CLICK HERE<<< The Drive circuit is a variable-gain input buffer added to the Interfax design, the pot Cornell's Overdrive Special ($430 retail/ $320 street) is a dual-channel pedal Tones Ethos pedal, it excels at achieving the famed Dumble overdrive tone. Next to metal, reggae is perhaps the most influential music genre to have entered our culture from…. This design is known for its fat and harmonically rich clean tone, and a complex, smooth overdrive tone with a nice mid range push. He started out in California with a small amp shop where he specialized in modding Fender amps. The whole idea around adding the boost circuit started because I had an unused triode, then I got to thinking about how much I liked the way a pedal drove the front end of a standard amp into a mean overdrive, rather than like a Dumble where the boosting circuit is later on in the circuit and built in as an integral part of the amp design for a. Whether it's a Dumble or a Carr, they haven't changed. Circuit Analysis and Wattage Lesson 14. Re: Output impedance of tl072 input buffer « Reply #4 on: April 22, 2015, 06:20:31 PM » I understand that, but what the impact will be on the response curves when I add a Fender tone stack instead of the existing one, when i have only a few hundred ohms of output impendance after inbut buffer, but before tone stack. This is based directly on an ODS100 schematic and applied to pedal form, with a handf. This is actually an excellent question! Part of the reason the classic Marshall Amplifier sounds the way it does is due to the way that tone stack is set up. Plus, I remembered that I wasn't constrained by the real world. Didn't Mesa do the same with their Subway amp or something? Actually, it's interesting to compare Mesa against Dumble, or rather the ap. The amp is a GT Solo 45 no longer made. Calculate the response curves of guitar amplifiers with multiple types to choose from, and possibility to edit circuit element values on the spot. The guys at Wampler suggested to me that the Ecstasy into the '65 would be a good tone stack. Just the pre tone stack circuitry. the tone stack is still partially. The preamp tubes go too asymmetric for midrange frequencies. I run an Eventide Eclipse in the loop and my verbs usually come from that, so I don't need the verb on the FS. Dumble also occasionally makes a tube-buffered external effects loop called a Dumbleator. I'm just after what other peoples experiences with speakers that suit a dumble type circuit but feel free to ask your own speaker related questions. The Dumble tone stack is pretty responsive. At high gain settings it is a terror! You get a tone many used in the late 60's. Though I dont think the stack is to blame, have a couple other things to fix before I chuck it. g v30's in a fender twin. The boost switch on the foot switch removed the first tone stack from the circuit, giving a volume boost, and a boost to the mids going into the dirt section. Please note that the Proluxe is a very different. 47:32 What’s a tone stack? 51:15 Pinpointing the buzz on a Silverface Fender Princeton 54:35 Class A, Class A/B and single-ended power tube arrangements 59:17 Tips on looking at vintage Gibson amps 1:02:48 A listener fixes his own Gibson Discoverer Tremolo 1:08:00 The triode mode used on high-powered amps 1:14:01 A brief chat about Dumble. The Bakersfield Guitar Amplifier™ is a 120W clean machine! Designed as a cross between a Fender Twin and a Dumble Steel String Singer, and is our cleanest, most powerful and sophisticated clean platform that features a 3-knob Reverb, our own Patent Pending Tap Tempo Bias Tremolo Circuit and a host of other features that make The Bakersfield Guitar Amplifier a standout in any style of music. His amps were used by used by Stevie Ray Vaughn, Eric Johnson, Carlos Santana, John Mayer, Robben Ford, Larry Carlton etc. Reverb controls are in the back. Plus, I remembered that I wasn't constrained by the real world. Think Robben tone then note it has a touch more on tap. I'm wondering if moving the Tone Stack in the signal chain would drastically change the outcome kinda like my project did. A breakdown of the Umble circuit will reveal a conglomeration of several schematics available on the internet (see the Dumble Amps section of Schematic Heaven for a nice assortment). It has a SS/Tube rectifier switch, and a new tone stack. They aren't my cup of tea. I think the primary reason for that is that the Dumble Overdrive Special tone is a very mid pushed sound, the so-called Dumble "bloom". Tone Stack Bypass - Turn the tone knob all the way counter-clockwise or just step on the Boost footswitch, and remove the whole tone stack from the circuit to get a "guitar-straight-to-master volume" path that is clean and powerful. Additionally, the recap kit upgrades every tone-critical electrolytic cap in the circuit with high quality F&T and Nichicon electrolytic caps. I'll be starting on my own as soon as possible! This means that the clean channel tone stack and gain stages "cascade" into the gain stage of the overdrive channel, lqyout the layojt channel to become "overdriven". The amp itself is a Dumble Style that Mark is universally famous for. Kirchhoff's Laws and Basic Circuit Analysis. :) Changes and improvements. A classic example is the Dumble clone tone of Robbin Ford. The guys at Wampler suggested to me that the Ecstasy into the '65 would be a good tone stack. I have a Ceriatone HRM 100 that I love. Originally the AC-30 had no tone controls, just the "CUT" that cancels highs in the phase inverter. Not changing out the power section. A pedla without this will only give you the dumble overdrive sound (any usually not a really good representation of it) because it only has one gain stage. $50K for a Dumble is stupid. See more ideas about Electronic schematics, Electronics basics and Dc circuit. If the Texas Tea control is turned all the way up, you hear just the tweed voicing, but the idea is to blend the two voices together for what Kendrick terms an SRV sound. ased on Steve Vai [s original signature Legacy amplifier. Just the pre tone stack circuitry. If they're not on the website then I DON'T HAVE THEM. If you would like this kit assembled for you by one of our techs, you can email your request HERE. The tone controls stay in the circuit and affect the sound. • View All Cabinet Dimensions •. AB763 Blackface Amp Modifications. The clean channel has an entire new boost circuit. High Octane Junior: schematic, bom, and build notes. Amp Questions/Troubleshooting. Included in the kit are all of the components necessary to to get your amp in top shape and the detailed instructions to make the changes easy. Coopecb1's Blackface TB Stack BitMo Kits BitMo Tone Stack BitMo Tone Stack - VJr Thread Adam's Amplifiers:Tone Stacks Duncan Amp's Tone Stack Calculator Badcat_Minicat Tone Stack Burchtone's "THAT" Tone Control "THAT" Tone Control Thread Advanced SE Mods for VJr, Harley Benton, etc. MESA/Boogie is a leading innovator of guitar amplification technology whose product line includes the Mark V®, Dual and Triple Rectifier®, Lone Star®, TransAtlantic®, Mini Rectifier®, and most recently the new Mark Five: 25™, CabClone™, King Snake™, Recto®-Verb™ 25, Bass Prodigy™ Four:88, Bass Strategy™ Eight:88™, and full line of overdrive and now equalizer pedals. 3-Band Passive Tone Stack. The mids are quite pronounced as well. The classic Marshall Tone stack tends to emphasize the upper mids, which in turn tends to drive into distortion sooner in that layer. BOOST - this, like the works of Alexander Dumble, bypasses sections of the tone stack to give a bolder present tone. The Bassman-style tone stack serves two purposes: to compensate for the treble and bass attenuation that inevitably occurs at each stage of amplification and to allow the guitar player to adjust the frequency response using bass control R B, middle-range control R M, and treble control R T. Active tone stacks do not have this limitation, but require power and generally more parts. is the first amplifier company ever endorsed by world renowned session guitarist Brent Mason. This approximates the OD entrance on several known OD amps. To get a Steve Vai tone, keep Treble low, Bass high and not too much Gain. The #005 version of the SSS is the most coveted SSS circuit since no online schematics or layouts are available. One turns on/off reverb and tremolo. The Classic is based on the 60'-70' tone stack and the Modern is the Sky. 00 USD has a sound that is polished and less aggressive then this but if you listen carefully to the Mantra at very low gain settings the overall effect is very, very similar. When the gain stage is kicked in, the amp gets rich in harmonics and delivers a bit more bite. These amps were handwired and are easy to mod to improve the sound. Ask the Experts. Simply Roll-off Tone Stack F. Dumble modified several of his older amps with a new tone stack he was developing, known as the skyline EQ because it's output viewed on a scope resembled a city skyline. They take quite a bit of time to build and they have to be built correctly to sound right. The Dumble tone stack is basically an Fender/Marshall tone stack with lots of switches added which shift the frequency response in various ways. How do Diezel keep schemes of it`s the tone stack until you get that sound. So since I did a layout for the Tubeworks 903 I thought to myself if it's basically a tube pre-amp I thought why couldn't the tone stack be modded to that of some legendary amps. And here is a video I made to demonstrate some tonal difference between the two tone stack approaches. See why the Tweed Deluxe 5e3 remains the first choice of top musicians. Amp Questions/Troubleshooting. This is the third in a series of simple tweaks and signal flow 'exercises' for the Fender Hot Rod Deluxe (HRD). 63 Cameron Ccv 1A Cameron CCV100 (Ch 1: Clean) An amp its creator Mark Cameron calls “one pissed off amp. This put the tone stack before the dirt section. The HRM amps added another tone stack after the dirt section, usually using internal trim-pots. One turns on/off reverb and tremolo. A breakdown of the Umble circuit will reveal a conglomeration of several schematics available on the internet (see the Dumble Amps section of Schematic Heaven for a nice assortment). including the 6SN7 as a SSRP circuit with no tone stack for the MIDI guitar synth in parallel to the regular guitar. Circuit Analysis and Wattage Lesson 14. There is a mod for adding Top Boost to non-TB 30's. There are two mini toggle switches on the front panel for Mid Boost and Rock/Jazz and the Volume control can be pulled out for a brighter sound. This set will allow you to complete a Marshall 50 watt or 100 watt JTM45 or pre-post Plexi as well as a Vox AC30 amplifier. It features 100w of 6L6 Power (1/2 power available of course). The #005 version of the SSS is the most coveted SSS circuit since no online schematics or layouts are available. This area of the circuit goes a long way in shaping the amp’s “voice. The FET level is adjustable using trimmer potentiometer inside the amplifier. Each voicing is the perfect combination of negative feedback loop topology and HD preamp and tone stack modeling. There is an optional "Boost" switch in the schematic that essentially cuts out the tone stack from the circuit like the Princeton's Mid control, allowing the full range of frequencies to pass thru like a Tweed amp; I tried this, but reversed it. Weber Speakers Homepage --- Loudspeakers, components, and equipment for the vintage musical instrument enthusiast. The right tone in the wrong player's hands results in a poor experience. The HRM Dumbles have a fixed Marshall tone stack at the output of the lead channel. The circuit doesn't share any commonality with any pre-existing Dumble-inspiried pedal. The Two-Rock Jet had this in spades, on both the clean and the dirty. What would you do to match an amplifier to Yngwie Malmsteen's style? See chapter 18, 'Swede. This design is known for its fat and harmonically rich clean tone, and a complex, smooth overdrive tone with a nice mid range push. The most popular amp is the jazz voicing, which is based on Robben’s Dumble #102 circuit. The clean channel has an entire new boost circuit. • View All Cabinet Dimensions •. Richard Kuehnel's website AmpBooks. By popular request, Fuchs Audio Technology is now providing service, maintenance, and custom modifications to select tube amplifiers. It has a classic Marshall plexi / Tweed Bassman cathode follower tone stack but there is a unique feed back circuit on the front gain stage which does not allow the first gain stage to compress as. There are quite a few variations on the 80's circuit, some more appropriate for jazz/fusion playing and some more for country or blues playing. (Both the channel and tone stack can be altered with the included footswitch. The Pro comes with two foot switch boxes. This gives a little scoop to the mids. They tend to preserve the guitar’s natural tone and retain the player’s dynamics. Increasing the 100k slope resistor to 150k seems to make the tone stack work more effectively, and you can also try replacing the audio taper 250k treble pot with a linear taper 250k treble pot. Just add an SPST ON/OFF mini-switch to the Mid pot's (or 6. Think Robben tone then note it has a touch more on tap. In fact, this "how should I set things?" question is the number one question we get here. 02 Carvin Legacy VL100 Legacy 1, 100w, EL34. The Persuader from MOD Kits DIY (available at modkitsdiy. With 30 watts, it's loud enough to use on my gigs. Tone Controls for The Real McTube Look at the picture that's the control, which I use for the Real McTube, I put it in between R8 and RV2/R9 of the circuit. I usually do uncommon stuff. - Mesa Boogie Amps (primarily the early ones) - Dumble style amps (at least the clean section; some clones that follow the Dumble HRM schematic have a tone stack in the OD section too but it doesn't have a recovery stage like the clean section. We added a tone stack that you can switch out and a mid. MESA/Boogie is a leading innovator of guitar amplification technology whose product line includes the Mark V®, Dual and Triple Rectifier®, Lone Star®, TransAtlantic®, Mini Rectifier®, and most recently the new Mark Five: 25™, CabClone™, King Snake™, Recto®-Verb™ 25, Bass Prodigy™ Four:88, Bass Strategy™ Eight:88™, and full line of overdrive and now equalizer pedals. One for the bright mixer cap and one in the tone stack. This design is known for its fat and harmonically rich clean tone, and a complex, smooth overdrive tone with a nice mid range push. Dumble Clean: Pair a Blackface Clone with a Compressor. The preamp tubes go too asymmetric for midrange frequencies. Included in the kit are all of the components necessary to to get your amp in top shape and the detailed instructions to make the changes easy. Development of the power amplifier culminated in the design pictured in Figure 4. We added a tone stack that you can switch out and a mid. Going down the tone-hunting rabbit hole of amplifier building. This of course is nonsense as Howard built all his amps to order and were tuned specifically to the guitar player. The character of the 5E3 is very unique. Modelled after the later 90's and beyond ODS amps. Schematic can be found here. I can't speak for Dumble but Ken Fischer would spend a week or 2 with eack amp swapping our different caps, resistors, tubes, whatever. Try the BMP tone stack on various pedals and amps and you can quickly tell if it is removing to much signal. - If you want a different tone response, try changing the values of the tone stack caps. This article chronicles our initial impressions in what is presented here as the Top 42 Best Guitar Effects Pedals of Winter NAMM 2015. It arrives as a collection of parts to be assembled into a powder-coated purple, pre-drilled Hammond-style cast-aluminum box. I have built 2 Strokes, pretty much by the book. FX Return Left has dummy patch cord inserted to turn off left speaker. Original schematic can be found on Revolutiondeux. Dumble Ods AMP, SSS Amplifier, Electric Guitar Amplifier manufacturer / supplier in China, offering 1983 Dumbles Clone Ods Overdrive Special Handwired Point to Point Guitar Amplifier Head 50W, 5f1a Champ Handwired Guitar Combo Amplifier 5W (G-5), Single-Ended Classic a Champ Handwired Vacuum Tube Guitar Amplifier Combo 5W and so on. The more I look at this, the less that I like it, and it will get rewired tonight (July 12). Presence Bypass - Dial in just the right amount of brightness or remove the presence control from circuit. Development of the power amplifier culminated in the design pictured in Figure 4. He had 2 of these amps. I'm just after what other peoples experiences with speakers that suit a dumble type circuit but feel free to ask your own speaker related questions. Powering the circuit with higher voltage tightens the sound and produce a more agressive sound too. AB165 circuit which is very crunchy and bright. com an exhaustive ressource about amp technology Duncan Amp:Tube data, tube amp schematic links & software like "Tone Stack Calculator" etc Fender Amp Field Guide: the tube amp lover's bible: lots of info on Fender tube amps, schematics and much more Unofficial Ampeg page. $50K for a Dumble is stupid. This is a common request we get here at Make’n Music. If I was to buy a Dumble clone amp it would not be a Andy Fuchs amp. The legendary one is the "Blue Sky Circuit" again IIRC. The FET level is adjustable using trimmer potentiometer inside the amplifier. Amp Questions/Troubleshooting. Amp Specifications: General: Make: Dumble Year of Mfg: 1978 Model: OD-100WR, Overdrive Reverb Special (OD Post Reverb) Tone stack: Passive Treble, Middle, Bass. Just not what I want from this amp, especially with the new EQ curves working so well. Tone Controls for The Real McTube Look at the picture that's the control, which I use for the Real McTube, I put it in between R8 and RV2/R9 of the circuit. BOOST - this, like the works of Alexander Dumble, bypasses sections of the tone stack to give a bolder present tone. Life is also simple when you come to change the output tubes, as the circuit uses a self‑biasing, cathode‑bias topography, which means you simply drop in a new pair of tubes and carry on playing. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: