The blackstar studio 10 el34 packs an el34 power tube. Not my favorite tube but the mullards in my sound city make for a great combination. Unique split design enhances power supply design, high separation of left and right channels, clear sound field and no background noise. El34, 6l6, 5881, 6ca7, and 6550 are among the possible choices. With the help from a program that calculates opts to a hifi level, i made 2x ultra linear opt for el34 pushpull config. Hoffman amplifiers tube amp forum, layout software. The internal design of this tube is slightly different than of its main competitor the 6l6 more on that later. Evh 5150iii el34 50w 1x12 tube guitar combo amp black. A combined input stage and driver drives the output valve, and a transformer matches the valve and the speaker system.
If youre interested with classic circuit and classic components, then you should try this circuit. If you want to build a tube amplifier and you dont want to just copy someone elses circuit it might be a good idea to learn how to design it. Description 2 x 12w tube amplifier with el34 and dynavoice dm6 loudspeakers. You might prefer some gooey soft tube sound and a vintage el34 amp design will deliver that. For sale is a fully restored pair of theta two monoblocks tube amps. They were used in our retail showroom and never abused.
There is a computer program that comes with this page to help you. Blackstar studio 10 el34 1x12 10watt tube combo amp. Need vacuumtube circuit components audio electronics. Tube cad is intended as a guide to understand and design tube audio circuits. The tough jog is to make the panel drawing on their cad software, but to.
El34s feature a pentode design and are at the epicenter of whats referred to as the british amplifier sound. Mts amplifiers are designed to accept a variety of different tube types. A great sounding el34 amp is a joy to listen to all day. You will therefore appreciate the fact that while all three software programs are serious wellthought out products, they are written expressly for the hobbyist and are easy to use. Designed with flexible and independent dualconcentric controls that allow for gain and. What are the best quality el84 and 12ax7 tubes for a hifi. El34 pushpull tube amp kit tu8340 adopted semiautomatic bias adjustment system which allows users to adjust the bias simply by pressing buttons even if the model takes on the fixed bias method no need of manual adjustment every time of tube rolling. Our website and phones are open, but shipping may take a few extra days, for the safety of our team. New production el34kt77 questions steve hoffman music. For additional tube amp design and construction tips, see my design and construction tips and suggestions for vacuum tube amplifiers.
Any queries, comments, suggestions, complaints, please stick em on the forum. Schematic of a class ab tube power amplifier with negative feedback. The evh 5150iii el34 50w 1x12 tube combo delivers signature harmonic overtones with increased dynamic compression and saturation to evoke a more modern british sound, all with the sustain and versatility expected from an amp bearing eddie van halens name. It is possible to emulate tube distor sound using software. This is a single channel amplifier mono of course with single input and single output. Homemade el346ca7 push pull tube amplifier with diy ultra linear hifi output transformers. El34 excels at reproducing horns and female vocals, with silky smooth texture. Lets look into the process of diy audio projects or making your own vacuum tube amplifier. Another example with a pair of el34 6ca7 being driven by the ecc8112at7 as a preamp and phase splitter in guitar amp style. The first two things to consider when beginning to design are. In audio amps, el34 tube produces that signature velvetsmooth mids. Another example with a pair of el346ca7 being driven. I currently design and build vacuum tube guitarbass amplifiers at home for both fun and profit.
Kt77 in audio amp gold lion kt77 is the hands down top choice for those who wants to get that something extra out of their el34 amps. El34 the el34 is a classic design that harks back all the way to 1953. And any company that tries to convince me that making their el34 out of blue glass with a coke bottle shape is going to make it. May, 2017 homemade el346ca7 push pull tube amplifier with diy ultra linear hifi output transformers. Discussion in amps and cabs started by lareplus, jul 24, 2012. These are important questions because they will dictate the choice of output valve which itself will dictate the design. Vacuum tubes wear out due to heat and high temperature. An easily constructed highquality singleended 8w amplifier using standard valves and the lundahl ll 1664 output transformer claus byrith 2002. This amplifier was featured on the january 2003 issue of the highfidelity audio. Whats the best el34 amp besides 8b i am looking for a tube amplifier with 4 tubes of el34 pushpull.
Each channel makes use of a single low noise tube 12ax76n11 at the input and proceeded by a power tube 6l6el34kt88 to accomplish power amplification. The power supply design diagram already provided on above tube amplifier circuit diagram. The downloads are at the glasswareyahoo store and the. The evh 5150iii el34 50w 2x12 tube combo delivers signature harmonic overtones with increased dynamic compression and saturation to evoke a more modern british sound, all with the sustain and versatility expected from an amp bearing eddie van halens name. Until i can run an amp into the sweet spot, the difference between one design and another is a bit academic. It uses 2 tube 6c33c, 2 tube el34 driver and 1 tube 12at7 pre. Tube amp doctor 6l6gc str premium selected vacuum tube, matched quad. Oddblocks classa pushpull kt88 tube amplifier 12sl7. How do you find a set of operating conditions that will work with 3 different tube families. This is the circuit diagram of 35w tube power amplifier with el34. Theres a page on how to use it with the vacuum tube models here. Class a single ended amplifier to reduce distortion. The output power varies from 3wrms to 8wrms depending on which type of output tubes are used and is a very good match with high efficiency 90db or beyond speakers. Tube bias calculator rob robinettes car and tube amp website.
If i play live again more often, ill probably buy another tube amp. The valve wizard single ended how to design valve guitar. It have to be experienced as a description is far from enough compared to feeling it in your chest. An easily constructed highquality singleended 8w amplifier. Also, i have previously posted some suggestions for a tube amplifier wiring color code that you can use during construction. The transformer model is the subcircuit that is used for the transformer symbol in the amplifier simulation. Evh 5150 iii 50watt 1x12 tube combo amp with el34 tubes demo. It was a very significant upgrade in sound even if the tube cost was more than the cost of the amp. Homemade el346ca7 push pull tube amplifier with diy ultra. The use of a single tube in the output stage of the power amplifier is commonly referred to as a singleended. Enter values in blue and click any calculate button select the tube type from the scrolling list. Mullard el34 pushpull tube amp schematic with dynacoa420. Nextone features a dualchannel design with clean and lead channels plus a shared threeband tone stack and presence control. Sound clips page tube amp sound clips and tunes of all types.
Sophia tubes, they arent building the tubes in america, just designed them here and having them built in china. Tube manufacturers revived kt77 along with design and sonics of the classic kt77. Also host the excellent magdemo transformer design software, and a host of useful newsletters on spice modelling. View all results for el34 tube amp at sweetwater the worlds leading music technology and instrument retailer. Here is the circuit diagram of the classic 5w tube amplifier with el84 as the final amplification component. Beside that, el34, el84, and 12ax7 vacuum tubes are used in many practical examples, to design the various parts of the circuits and to. Recently, when i was stocking up on nos for my main amps, i bought a mullard tube set amperex for the 12at7 for the jolida 302 in my office. If your tube isnt listed then pick one with the same max dissipation rate which is shown to the right in the tube list. As can be seen, the design of the seamplifier is simple. Each program is windows based windows 9598ment2000 and comes on cdrom. Universal loadline calculator for vacuum tubes vacuum.
Tube bias calculator rob robinettes car and tube amp. I desperately want to see vacuum tube components added to the list of available circuit components. Any vector program will work fine, like adobe illustrator, corel draw and such, but if. Design your own custom turret board or eyelet board. You can use el84s if you like but i prefer the russian 6p15. Evh 5150iii el34 50w 2x12 tube guitar combo amp black. Jan 20, 2018 description 2 x 12w tube amplifier with el34 and dynavoice dm6 loudspeakers. That is a coloration that you might find pleasant or amusing, but it can be a strong coloration. The amplifier worked from 1954 to 1989, whenever and went off, with an average lifespan of 15 read more. Bias meter on side panel, bias controls for each tube. Its deep as the internal hell, clear like tuned piano and makes a world of difference to enjoying music. The tube cad journals first companion program, tcj filter design lets you design a filter or crossover passive, opamp or tube without having to check out thick textbooks from the library and without having to breakout the scientific calculator. Design and construction of a pair of pushpull classa, ultralinear mono block tube amplifiers that can be used with several different power vacuum tubes including el34, kt77, 6l6gc, 6550, kt88, kt90.
The circuit is interesting but i think it is hard to find the tubes. Singleended tubebased guitar amplifier by joe linn senior project. Discussion in audio hardware started by michaelxx2, sep 23, 2017. To use this calculator to compute your loadline, with parallel tubes, simply specify ntimes the overall load. Ltspice and vacuum tube models last updated 111107 17. Lowvoltage tube amp is great for beginners hackaday see more. Biasing an amp requires some knowledge of tube amp circuits and experience with high voltage. Oct 11, 2011 the largest difference from the transistor amplifier to the el34 tube amplifier is the bass. See more ideas about valve amplifier, vacuum tube and amp. A trio of software programs for the intrepid tubephile. If the file comes back as a load of text, best to use rightclick and save as on the link.
This tube amplifier designed in 1953 and worked from 1954 until 1989. El34the power tube found in the iconic british stack amps, the el34 is loved for its warm, fat tone and unmistakable rock crunch. You can get a circuit board from them or you can build it point to point. Theta tube amplifier el34 version for sale us audio mart. Because they are all different, they require different bias settings for safety then it goes on to describe how to set the bias the test point and trim pots are on the back of the amp for each tube. For those of you who still have old computers running windows xp 32bit or any other windows 32bit os, i have setup the download availability of my old old standards. You should build the two similar circuit to make it stereo. To protect the amp,tube and machine are packed individually. Among amplifiers employing two el34s per channel in pushpull, i suspect that a pair of marantz 2 monoblocks in good condition would outperform an 8b.
The el34 is known for its strong mids and aggressive character and infuses the studio 10 el34 with truckloads of warm british. You might prefer some gooey soft tube sound and a vintage el34 amp design will deliver. An easily constructed highquality singleended 8w amplifier using standard valves and the. Sep 23, 2017 you will find that the very best tube designs and the very best ss designs start to sound a lot alike, that is, they dont really have a sound of their own, rather they faithfully amplify the signal they are provided.
Hi, as i explained in a post in loadline calculator for power stages, when you attach a load to n parallel tubes, each tube simply sees ntimes the load. On idle, theyre all just a bunch of hum with rubbish tone controls. Other tubes planned el84, el34, kt88, 6v6, 6l6 and etc. Hello el34 baby huey builders, as suggested by scd in the. Its a pentode design, which means it has five elements cathode, anode and three grids.
Wait, wait maybe we should talk about why tube amps are worth this kind of trouble first. What sound are you looking to get from the power amp, and how much output power do you want. This guide discusses all relevant aspects for an integrated pushpull vacuum tube amplifier design, including the power supply unit. If you are uncertain that you are experienced enough to work on a live high voltage amp, please take your amp to a professional to get it biased. This design procedure and program works with either single ended or pushpull output stages.
If you have not been trained to work with high voltage then have an amp technician service your amp. Thus safe and simple bias adjustment is realized a dream feature for tube lovers. My preference for my home audio is my el34 mono blocks. A tube amplifier chassis contains lethal high voltage even when unpluggedsometimes over 700 volts ac and 500 volts dc. The calculator computes the loadline of of a single tube. I was asked by kegger on the ak tube amp audio forum if i was interested in designing a pcb based amp on the 6l6 output tube family. From glassware the publishers of tube audio design software. Unleash the highgain destruction of the 5150iii el34 from a handy 2x12 combo. Pcb version is a standard version, with 2x output transformers size 66x36 handmade version is a luxury version, with 2x output transformer size 76x40, inside components are soldering by hand, easily to upgrade handmade without tube version is same than handmade version, but without power tube el34 and rectifier 5z4p, but the preamp tube 6n2 is. These are important questions because they will dictate the choice of output valve which itself will dictate the design of the rest of the output stage and power supply. Keep those filaments lit, design your own vacuum tube audio. This amp puts out some amazing sound and has more than enough power at 16 watts per side. Taking the advantage of technical knowledge and expertise accumulated to date researching for over 20 years being attracted and absorbed in premium analog audio systems, lansing audio has been producing the highest quality vacuum tube sound systems. Among amplifiers employing two el34 s per channel in pushpull, i suspect that a pair of marantz 2 monoblocks in good condition would outperform an 8b.
Beside that, el34, el84, and 12ax7 vacuum tubes are used in many practical examples, to design the various parts of the circuits and to compute the values of the needed components. Due to its narrower profile, el34 tubes can run quite hot and tend to. If you want to build a tube amplifier and you dont want to just copy someone elses circuit it might be a good. Ltspiceswitchercad iii a nice easy to use simulator which is gaining rapid acceptance.
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