DIYAUDIO LLC 3. Once the enclosure is assembled, it is time to give it a surface finish and add the protective hardware. To seal the wood, you should first appl Of course, an extra 200 MA might be fine, depending on the transformer. (The load resistances discussed here are for one tube--since this project uses two, then 1/2 these values are equivalent within the circuit.) This is a standard two-stage preamp. With this in mind, I decided to do what any maker would do, design and build my own guitar amp. A second "presence" control, if you will(NOTE: I tried it, but the amp became "farty", so I ripped out the NFB loop right away.). About: Industrial Designer. Trinity Amps offers an economical Do-It-Yourself way to build you own Trinity Amp such as the Trinity 18 Watt sIII, 18 watt v6 Head, TC15 Head or Combo, Tweed Deluxe 5E3, TRIWATT Custom Lead Head or Combo, Tramp Combo or Head Kit. Although p2p soldering is not very difficult, it does make the wiring a lot more complicated. I harvested a piece of 150 x 60 x 2 mm aluminium sheet from a discarded PC. If you are still having trouble, don't hesitate to drop a comment and I will try to help you. WebMonoprice 611720 20-Watt 1x8 Guitar Combo Amplifier - Black with 86dB of Gain, 1/4 Inch, Headphone and 3.5mm Aux Mp3 Inputs for Electric Guitars. See pic 3. We now have Elekit TU8600 in stock. But during the testing phase the switch wasn't wired. Finally, an Ampeg B15 Kit!! In other words, I was just insecure about me as a maker of Serious Amplifiers. ), nearly 80% of the output of a 6V6 can be achieved with a 50L6 (~4 watts for a 50L6 vs. 5 watts for a single-ended 6V6 tube.) The only drilling that is needed with these is to bore out the hole for whatever transformer you are using. Here's the entire schematic (V0.2), with a few changes-- The whole schematic is now a single graphic.-- One of the power amp cathode bypass resistors has been reduced from 50uf to 20uF. Interviews. This instructable is in the Amps and Speakers contest so, if you consider it worthy, please vote for it. This is why it is important to add the screw terminals, as they ease assembly and repair. Good old "Ohms Law": I*R=E (Current * Resistance = Voltage.) I described the making of my Serious Amp as good as possible, including the mistakes and successes. 110V : 2000 (ohms) M41 (I only used it because I had it lying around. Then switch in an extra 15uF on both with a DPST switch. Universal Power supply Work from the center outward, pushing any air bubbles out with a brayer.Cutting and gluing the cornersHere's a quick tutorial on the corners (there may be other types, but this technique worked OK.)-- Glue the front of the piece, wrapping the vinyl over the edges and around the back. I know a thing or two about analog electronics and I can read and understand electronic diagrams, but I never made something from scratch that connects directly to a wall outlet. Consider starting with a bare circuit board from ebay, or a kit, or even a completed board. Burson Audio V5I Hybrid Opamps have also been restocked. The wallwart was already on hand. An attractive alternative: change the hard-wired caps from 40uF and 15uF to 10uF for each. Grid stopper resistors were added, simply because they are on the Angela project, and the old Gibson schematics, too. Many acoustic guitar amps now come with built-in effects processing that enables you to augment your guitar's sound with reverb, echo (aka delay ), and/or modulation effects that can run the gamut from thickening up your sound to lending it an almost psychedelic feel. It helped that the gutted TV also included a (mighty big) inductor. This release features Lundahl LL2785B transformers and an Alps RK27 potentiometer. 1 year ago I drilled a 20mm hole in the bottom of the case, so that the floor can ly flat on the case's bottom.In the floor, I drilled two 35mm holes to fit in the big capacitors and I cut away a rectangle to fit the mains filter.I used a tie-rap around the power cord on the inside of the box as a strain relief. All kits feature cabinets manufactured by Weber Custom Cabinets. 5W Soldano SLO 5 The transformer must be firmly screwed in with all the possible screws. So heres my tip: Dial in your sound in the rehearsal room, together with your bandmates. Hi, I read the section preamp supply B2 , step 6, and you are talking about 220 Ohms and 1K resistors, but on the general diagram we see 100K plate resistor stage 1 and 270K on stage 2. Ask Amp Man. Don't quite get your question? You need the length of the resistor's leads to mount other parts on. Here's a secret: mylar caps are polyester, mylar is just a proprietary name. The two-diode trick works only for AC--current flows through one diode at a time, dropping that half of the waveform by the diode's voltage drop amount. For this project, the only non-polarized electrolytic used were for the preamp cathode bypass caps. More harmonic content (2f): lower plate resistor If I ever make another amp, this is the part that I'll want to do better. However, there's usually a range between high and low bias extremes that results in the most "natural" amplified guitar sound. A negative charged grid repels electrons, so no current flows. I started with a 220 ohm resistor for the RC filter, but settled on a 1K value for a smoother supply. (in practice--rectified, filtered and loaded, it's about 190V, still excellent.) Did you make this project? It was modified, too, during building. I'm thinking 80 to 100 w. I want to keep it as simple as possible and not change what you have done too much. The secondary coils of the transformator must be connected. Let dry according to directions. Now I could plan on three tubes that would run with 6V heaters, and the TV transformer included a 6.3V secondaryWell, I just HAD to build this! It's also easier to keep a single-ended amp in "Class A territory." However, the extra gain was unnecessary. I found this the hardest part of the project. Finishing washer dress up the screws. The chassis supports and cross-brace were attached with a dowel joint.There might be easier ways to do it, but it's a nicely-hidden joint. Their kits are graded for difficulty and they do not recommend anyone attempting to build any of the kits that are rated at 3 or higher unless you have the assistance of a qualified amp builder or electronics technician. WebTrinity Amps offers players an economical Do-It-Yourself way to build you own Trinity Amp. If you find yourself dreaming about building an amplifier now and then, but are not sure about how to get it done: Read on! I have built IKEA based speakers (please Google) and am planning to build a pair of Marc Hennesy-style speakers, combining two full-range cabinets with one sub-woofer. To seal the wood, you should first apply a coat of clear lacquer, and then, to give it it's black color and bring out the texture of the material, apply 2 generous coats of black matt paint. Don't believe it when they say "it's not the voltage, it's the amperage that kills you"--because it's both. Share Watch on And this is the simplest, easiest thing to travel with as well. Also changed--originally, the preamp plate supply was slated to run on the same voltage as the screens. I'm looking out for perfed aluminium sheets of at least 1.5 mm. speaker, if desired.A small "beam blocker" circle was left in the center, to block the harsh treble that usually projects at a narrow angle straight from the speaker.Eight holes were drilled and countersunk for the mounting screws. Can you assemble a DIY Guitar Amp For FREE? Since it's controllable, I'm OK with that, for now. There's more cathode bypass capacitance that I normally care for. These 5U cases, you just put them together and bolt your boards in. Blues. I'm really enjoying putting the amp together. We'll never know for sure unless it's bench-tested, but I suspect this amp is running above 4 watts per tube, over 8 watts total. Solder the 100uF cap's minus side to pin 8 and the 10k resistor (picture 5). Much of the tone is formed here. In this case, I wish I had:--Used a heaver, possibly stock, metal chassis.--Substituted a 10 inch speaker.--Used a turret board, instead of point-to-point. However, this value is for one tube. Very nice write-up ynze! I'm not an audiophile and not an expert on amplifiers either. --Since the transformer was right at it's limit, the core (over) saturation gave it a very "Cream" sounding distortionunfortunately, chords and comping leads pushed it over the edge, and there was no definition, just muddy, nasty distortion. If it were amps alone, then even a AA battery can supply many times what's needed to stop a human heart. But the 2100 primary gave the amp a more gravelly, overdriven sound. In fact, one 12AX7 "went nuclear" and burned out (~$25 "down the tubes".) The cabinet was skinned with a roll of black vinyl that's been laying around here forever. I know the second amp build will be quicker and easier to build after I have the first one under my belt. I already had a very nice old model. Looking at the sometimes gorgeous designs, I realised I wanted to build one of these babies myself. Incidentally, it was the addition of the the LC filter (pi filter) that prompted me to add the standby switch--the initial inductance spike exceeds the 200V max of the 6DG6GT's, by a fair amount. I only drive one pair of Advents, while the Sansui drives the other pair and paradigm speakers. Look online for the Gibsonette schematic. were too large for any bit, and were also "nibbled," and then filed down to reduce any sharp burrs or edges.The rest of the holes were made with a stepped bit. I have used the 4U, and these 5U cases as well as Aliexpress cases. These plugs are also sold with an integrated power switch, about two meters of heavy duty power cable. CeriaTone Amplification sells affordable guitar tube amp board kits for the DIYer, amp shop or a boutique amp manufacturer. Absolute jaw dropper and dynamic wide sound stage. These are the same boards we use in our completed amplifiers. Torres Engineering sells tube amplifiers, parts, amp kits, guitar kits, guitar parts and downloadable plans for building and modding many guitar amp models. Product was exceptionally high quality and perfectly manufactured. No glue was used.Attaching the Baffle PanelA bottom cleat, made from a section of 1x2, was added to the cabinet.The front baffle panel was screwed to the cleat at the bottom, and to the chassis supports at the top. 9. Finally, once everything is connected, it is time to add the speaker from the front, blocking access to the electronics, and test the amp. Plug More stages compensates for any gain losses. So how would I got about it. Incorporates Dumble style frequency specific feedback on the return gain stage resulting in lower distortion and more transparent sound. Placing two large diodes in parallel but opposite directions in an AC supply limits the voltage by the voltage-drop amount (.5 to .7V), just the same as one diode in a DC supply. I originally estimated the power output from the datasheets as approx 7+ watts. The mains plug, the fuse, the switch and the indicator LED are fitted in the case itself.Browse through the pictures to see what I did. Hey man, very impressed with this amp. Unfortunately, the filament secondary for my power transformer isn't a separate winding, and doesn't have a center tap. So the preamp supply was added.The Inductor for the LC Filter A choke input should drop the secondary voltage to 0.9 of the RMS (vs the 1.414 for a standard filter), so a 225V RMS AC secondary yields 202.5 VDC, also excellent. This would tone down the "ballsy-ness" a bit. The alternative way is to use the formula for output impedance: I highly recommend this amplifier. Initially my main concern was to keep the preamp tube far away from the power transformer. The kit was flawless (as always), the build guide by 6L6 was excellent and we must thank Nelson Pass for his generosity to all of us. KoiBoard - Fully Customizable Mechanical Keyboard With a Koi! It's possible. And theres a lot of 8 watt amps that scream as well if miked well of go into a desk. There's a long history of small practice amps with these tubes, yet they are generally ignored today. For 190V (we're somewhere between 185 and 190): Building the kits requires that you enjoy this type of work, know how to solder well, pay attention to instructions and details, and typically finish large projects that you start. This pc board is a perfect solution for helping prevent heat and mechanical damage to the potentiometer. http://sound.whsites.net/articles/audio-mixing.ht How to Make a Voltaic Pile - the World's First Battery, AI-assisted Pipeline Diagnostics and Inspection W/ MmWave. Really don't understand why the two 6v6's in paralell arent outputing more.I can't find any mistakes in the circuit. I tried using the Duncanamps "Tone Stack Calc" designer, but it's useful as a starting point only. What a stunning pre-amp!!! The drawing in picture 1 is an attempt to show how I set it up. To read our articles about building these amplifier kits please click on the category of interest in the orange menu bar above. For people who made Serious Amps before: Please leave your comments and tips for others. Connect the plus-lead of the 47 uF cap to the 680 Ohm resistor (pic 8). This is due to the sensitivities to wire placement, grounding schemes, and other parts related issues, troubleshooting the potential malfunctions and noises which can be very frustrating without the necessary experience and knowledge. That's what I'm calling "max presence." Honey Badger Finally, solder the wires to +V, -V and ground to resp. was done before I was happy with it. Standard 3 pin power cable (the one used in all PCs). To do this right, you must find out which wires to connect. The sheet was then held in between the clamping sides of a "Workbench," and bent downward to a 90 degree angle, with a heavy steel carpenters square. I intended to include a section here on using loadlines to design a preamp stage. --I tried both 1500 and 2100 ohm primaries. The red line represents our load resistance, somewhere near 3500 ohms (remember, for two tubes, that's 1700 ohms.) I think I'll hold off, and keep it general. Highly recommended! Typically, they supply a range of voltages for different purposes--a current source for the output transformer, voltages for the preamp tube plates, and sometimes (in this case) a separate voltage for the pentode screens. Doberman Music Products is the main sponsor of AX84.com the Cooperative Tube Guitar Amp Community. I used mylar caps. These are often called "voltage-dropping resistors," but their operation depends on the current draw of each stage. It's my first "serious audio" project ever. Excellent product, even if I am now in the development phase I already have good satisfactions. There are many options: build a kit, build from an existing schematic, or branch off like I did, and try something different. There's far too much interaction between the controls, too. Furthermore, the power supply includes some big capacitors which store quite a bit of energy even when the mains are disconnected. Again, some will argue the merits of carbon comp vs. metal foil resistors, etc. Hi--I built a mono LM1875 gainclone some years ago. Then mount both amps on the heat sink. It works well, but the groove is a bit wide (2.5 mm). He built a couple of them, but I have NO idea about them. Call. 1. To make things easier, I have grouped the reference files you will need as a zip download. Don't worry, the instructions for each part are detai For both preamp stages, smaller cathode bypass caps will shape the tone in a brighter direction. So I had the choice between buying a cheap receiver while knowing I had all the parts for a much better amp or just get started building it. Not really hot, but I didn't play power chords for three hours straight, either. Of course, that's one advantage of the 12AX7--it's two triodes in a single tube. What differentiates our kits from others is: These are high quality DIY kits using the same parts that we use on our amp builds. At this bias level, some clipping occurs (allegedly) due to "grid current limiting," which is somewhat softer. To pick the right transformer, look at the data sheets for the power tubes. BitMo Mod Kits makes kits to modify amplifiers including BlackHeart, Epiphone Valve, Fender, Jet City and Vox models. 6DG6GT : 6V, Choice of components are alway contentious for tube amp builders. That's significantly lower voltage than most power tubes, which run at 300+ volts. My first layer of lacquer was too thick. In theory, this should add some compression to the amp. A tube amplifier has an inherent peak-to-peak asymmetry, which can be lessened or increased by varying the slope of the "loadline." We offer our Trinity built boards for your DIY project. If your speakers are so-so, save up for some new ones.BobI have a post on my blog about the amp I built.Your's is fantasticwww.mieviewscape.comwww.mieviewscape.com. Everything is included except solder. The effect the Cathode Bias Resistor has on gain is a little more subtle. The second stage grid-leak resistor is a more typical 220K. Simulations which yield nearly identical frequency responses sound VERY different when actually implemented. WebShop Guitar Kits Shop Bass Kits Shop BYO Specials. My biasing voltage is slightly less ("hot" bias) than is noted on the datasheets. Finally, add the corner protectors to all corners, the handle to the right side of the amp, and the rubber feet to the left side and bottom of the amp. you could use eagle to design your pub it is drag and drop. Power tube cathode bias : 5 to 10 watts Once dry, they are trimmed flush (see pic 8). A decent set runs $75 or more.NOTE: When passing wiring in / out of the chassis, always protect the wires. But it might work on a trip or to play in the living room!Amazon LinksOontz Angle 3: https://amzn.to/3mJWTMlBugani 40 Watt: https://amzn.to/32XX2Uw3.5mm to 1/4\" adapter: https://amzn.to/3i4pEj410 ft 3.5mm cable: https://amzn.to/3i4pEj4Guitar: https://amzn.to/306kMnHMore DIY: https://www.youtube.com/playlist?list=PLSVfUQKkNUqbI2GiCnKlJGPeLtfCcweFJMore Gear: https://www.youtube.com/playlist?list=PLSVfUQKkNUqb0xIdDxT4yen6QebY_FoLDVisit Mark Zs Guitar School All courses 25% in September with coupon code MZSEP20Mark Zs Guitar School: https://mark-z-guitar-school.teachable.com/coursesBack In Black 40th Anniversary Course: https://mark-z-guitar-school.teachable.com/p/back-in-black-40th-anniversary-courseGet guitar tabs: https://tinyurl.com/2s3c7c2aPlease help support my lessons by donating here: https://paypal.com/paypalme/mzabel3350:00 Intro1:42 Assembly2:38 Demo#markzabelguitar #diyguitar Perhaps the same approach would work with two 50L6's, probably wringing 7+ watts from the pair--that would be a true test of their suitablilty. A parallel SE design would be a true Class A amp, too, with all the of the richness and aural mystique of the class (and more punch than my Kay. Once the enclosure is assembled, it is time to give it a surface finish and add the protective hardware. Shop now & build your own guitar! You Can DIY! To form the corner, first remove the excess by making two cuts.-- Cut the excess overlap, outward toward the back of the edge (cut #1.) They are very handy tools. Store Helpdesk (Non technical, order related assistance) If this is the case, open the amp and check that the audio chain is followed properly, that is, the input goes into the first module, the output from this goes to the next, and so on. Solder the 10k resistor between pins 4 and 8 (picture 4). I like your ethos, there's definitely a serious amount of snobbery, and "status posturing" in the tube amp universe, whether it be guitar, or Hi-Fi. great amp, fun to build as well. Shop now & build your own guitar! 6 years ago. WebSolder the 47uF cap's minus lead to the plus-side of the 100uF cap. As a general rule, a higher (cooler) bias voltage results in a harsher distortion. If you are thinking about building this amplifier, please don't hesitate! The top plate is made of 1/16 aluminum plate and the back plate is made of 1/4 aluminum plate. Uhhhmmmm You would need either an entirely different op-amp, or design a grid of at least four LM3886's to distribute the power. Colleen Fazio. The $15 spent here was well worth itA pilot hole is needed for the stepped bit, so don't throw out the normal bits. Most of the plywood for the cabinet was "reclaimed" lumber, scavenged locally. Try to cut the grounding wires as short as possible. After this project, layout for turret board makes perfect sense--tubes on the back, controls on the front and the component board between.So, additionally, the chassis layout sucks, too.