Single ended tube amp layout software

A trio of software programs for the intrepid tubephile. Kt886550 compatible single ended amplifier 5th jan 2014 using fladance mp player 8w rms. Single ended el84 tube amp information, guitar amp. A very important consideration in attempting to create an amplifier with a natural characteristic is. Single ended tube amplifier build 2017 part 8 youtube. A singleended guitar amp output stage is generally biased class a, in order to maximize the output power before distortion. Please visit my tube amplifier forum heres the place you can go to ask tube amplifier questions. Choke how ever is a bit gray territory for my knowledge. The major factor involving the design of this single ended output stage is matching an available output tube to an available output transformer ot, which can provide the proper impedance matching.

However, some previous experience with building vacuum tube circuits is highly recommended. It was created by aleksandar kitic, who has said that the amp was really designed for the first time builder, to provide results even with salvaged parts or the cheapest. Singleended triode set amplifiers have a cultlike following in audiophile circles, but their limited power output has limited their usability. One connection goes to the power supply, the other to the plate of the power tube or tubes. This design procedure and program works with either single ended or pushpull output stages. Recently added speakerheadphone switch and headphone jack. The first tube power amplifiers were singleended circuits using a single tube driving the primary of a transformer. Interestingly, the euphonious nature of the single ended triode set amplifier can be demonstrated even via mp3 files.

Tube amp schematics, tube amp information, tube amp projects. Set vs single ended parrallel audiogon discussion forum. I went through every tube in the tube cad library trying to get a voltage gain of 50 and a tube current of close to 10 ma. These high quality components are brand new and consist of triad filter choke, hammond filament. Apr 19, 2012 diytube 6l6 clementine single ended tube amp shannon parks, owner of diytube, has made a number of projects available since 2003 when the diytube st35 clone was made available. A single 4 amp slow blow fuse added to either of the rectifiers 5v heater line will protect the circuit ignore the second fuse in the layout, its not needed. Interestingly, the euphonious nature of the singleended triode set amplifier can be demonstrated even via mp3 files.

My understanding is that a lot of smaller amps have single ended designs. This is a singleended triode amp that i built using the 8 transmitting pentode, connected as a triode. By trying out several different sets of operating conditions in the computer i could eliminate hundreds of possibilities without playing with electricity. Most push pull designs produce more power than single ended amps do, and this can be a big factor for inefficient speakers. Unfollow single ended tube amplifier to stop getting updates on your ebay feed. This design was chosen for its relative simplicity compared to the more efficient but more complex pushpull output stage, in.

Revenge of the fallen and i was inspired to build an enclosure for a vacuum tube amplifier that incorporated the decepticon logo. This is a single ended triode amp that i built using the 8 transmitting pentode, connected as a triode. The use of a single tube in the output stage of the power amplifier is commonly referred to as a singleended design. This instructable will show you how to build a vacuum tube amplifier using parts salvaged out of old electronics and 2 purchased vacuum tubes. The sound produced by a singleended amp is rather unique. Just like the singleended version, the inductor must never be expected to give up more than twice the idle current. Where ao is the combined gain of tubes and transformer, vo is the output voltage, and vg is the rms voltage applied to one grid of a pushpull amplifier or the loan grid of a single ended amplifier. Prior to this build, i have builtmodded aftermarket gradostyle headphones, built my own headphone cables and interconnects, completed bottlehead kits, restored a tube tester, and made circuit modifications to my glenn otl. Singleended amplifiers normally operate in class a. At first i set up a simulation with a simple grounded cathode amplifier stage that used a resistive load. Since for power amplification it is usual to use pentodes or beamtetrodes, which produce predominantly odd harmonics, we can expect all. You can get a circuit board from them or you can build it point to point. At the right you set up choice of fixed or cathode bias.

The plate voltage is about 320 volts and the output stage is a classic singleended cathode follower. The first tube power amplifiers were single ended circuits using a single tube driving the primary of a transformer. From schematic to ordering parts to cab design, it is all here and explained in detail. Like a singlestage transistor amplifier the output is inverted, a rising. Even though 6l6 tube is used primary in guitar vacuum tube amplifiers, many manufacturers use this tube in audiophile designs. Seta single ended tube amplifier audio design guide. Diytube is both shannons small business located in central illinois and a closeknit forum featuring a handful of helpful and prolific members. Next select the type of bias fixed or cathode and power supply dc or ac. Assembly manual schematic parts list tubes and applications design simulations. Note that the primary impedance of 5k, which must be roughly twice of what we would use in a singleended version. The project details the build of a single ended 6l6 harp amp.

Also in the hoffman pages is the version i built using a 6v6 and the transformers from his site, along with a layout. Such a topology is pretty difficult to implement, due to a severe input voltage swing request over the power tube grid. Beside that, el34, el84, and 12ax7 vacuum tubes are used in many practical examples, to design the various parts of the circuits and to. Hoffman amplifiers tube amp forum, single ended el84. Once the gain and output stages were designed, i used duncan amplifications tone. Ive also heard several terrific single tube sets and pushpull amps as well. Singleended amplifier simply require much more care in design than pushpull designs. Why buy a single ended tube amplifier when you can build. This project is recommended for beginning vacuumtube doityourselfers. In a nutshell, this program is a virtual workbench for singleended tube amplifier output stage design. 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. The simple 45 began as the starting point for a super tube amp design. Ltspice1 was the primary tool used in development of the circuit design.

I used the original tube cad simulator to figure out a few things before i could build the driver stage. Stereo class a singleended audio amp handcrafted reisong a10 el34 hifi audio stereo tube amplifier singleend class a amp riverstone audio testedmatched pair 2 tubes 7pin ge jan 5654w fullytested vacuum tubes upgrade for 6ak5 6j1 6j1p ef95 ge 5654w platinum grade pair. Ecc83 and 6aq5a which is able to produce a good 6watts of unclipped power. In an effort to give a little back to the internet harp and tube amp communities, i have decided to offer this free project. The tube amplifier replaces a solidstate amplifier which was driven by a tube. Note that the primary impedance of 5k, which must be roughly twice of what we would use in a single ended version. They are usually used for relatively small amplifiers, e. Ive been eyeballing that schematic and while most of it makes sense to me id still like to have layout as a backup before i dive into this, ive built couple amp kits and many pedals but not amps from scratch. A single ended guitar amp output stage is generally biased class a, in order to maximize the output power before distortion. The problem is as complexity increases the more likely you are to make an assembly mistake and troubleshooting a complex amp can be extremely difficult for a beginner.

The power amplifier involves three stages, two of which use a 12ax7, and the last of which runs through an el34 pentode tube. A simple ab comparison is available on the sound clips page. Introduction the aim of this project is to overcome the traditional single ended vacuum tubes amplifier output stage limitation, adopting a cathode follower configuration. Oh one last hitng, i left off the nfb on both of my ga5s.

Angela super singleended layout telecaster guitar forum. We now have a hybrid amplifier, containing a tube frontend and a. The large rectangular cutout for the transformer was made with a nibbling tool. There are hundreds of pages of tube amp information on my library page. Jul 31, 2017 single ended triode set amplifiers have a cultlike following in audiophile circles, but their limited power output has limited their usability.

Singleended pentode mode, with primaryside feedback, and. Thoughts and opinions of a tube audiosingle driver junkie. You can use el84s if you like but i prefer the russian 6p15. Single ended class a operation is less efficient than pushpull. Singleended class a operation is less efficient than pushpull. This design was chosen for its relative simplicity compared to the more efficient but more complex pushpull output stage, in which output tubes are. Diytube 6l6 clementine single ended tube amp shannon parks, owner of diytube, has made a number of projects available since 2003 when the diytube st35 clone was made available. I have met several musicians who not only fix their tube amplifiers, but modify them, without any deep knowledge of how tube amplifiers works, let alone such concepts as transconductance or perveance. I used a small ot, i dont know its specs, other than it came from one side of a singleended el84 stereo hifi amp. I dont recommend a fuse on the power transformers bias tap because if it blows the power tubes will run away with max current and burn up. This is my first vacuum tube amplifier, original design by andrea ciuffoli. Select an output transformer and a power tube from the builtin libraries. If i had to pick the single best amp ive heard, it would be an old western electric pushpull amp.

I have met several musicians who not only fix their tube amplifiers, but modify them, without any deep knowledge of how tube amplifiers works, let. Output stage the major factor involving the design of this single ended output stage is matching an available output tube to an available output transformer ot, which can provide the proper impedance matching. Whats so irresistible about a singleended triode set amp. At the upper left you choose the tube type, and the number of tubes in parallel. Singleended classa tube amplifier design and construction. The project details the build of a singleended 6l6 harp amp. Unfortunately, the amp i heard cost more than three times the price of a kageki, and the kageki is not cheap. A number of recent visitors have registered surprise that we do not have any music playing in our workshop. There is a computer program that comes with this page to help you. Below that you choose from a list of popular output transformers. If you have 82 dbwm multi driver monsters, youll have a hard time finding a single ended amp that will drive them to acceptable roomfilling and realistic sounding levels.

The first screen in tubecad shows the schematic of the output stage. I used salvaged transformers purchased well below online prices and 807 tubes which are still reasonably priced. It uses a single pentode as the driver a 12hg7 video amp tube, and a solidstate power supply with a microprocessor controller. Dec 12, 2019 i have decided to take on a big project, a fullsized, from scratch, single ended triode headphonespeaker amp. How to build a tube amplifier rob robinettes car and tube. My design involves a fourstage preamplifier, which uses two dualtriode. Understanding vacuum tube amplifier schematics basics. In cases like this, many people opt for a simpler solution that uses one 6v6 or el84 in single ended class a configuration, or use a double triode in pushpull configuration, but i wanted to keep as much of the character of the original slo, so i really wanted to preserve the topology of the power amplifier and use two power pentodes in push. Single ended amplifier simply require much more care in design than pushpull designs. Welcome to the hoffman amplifiers forum may 15, 2020, 11. The sound produced by a single ended amp is rather unique. At this point, i would not encourage anyone to download or use 2. Amps with parallel single ended outputs the gear page. The output transformer primary is not centertapped, having only two connections.

Im thinking hammond 125ese as ot and hammond 290bex pt would work. Make something unusual 6dg6gts in a parallel singleended configuration qualifies as. As it turned out, this is exactly what was needed to build a circuit using the 6cy7 tube which i had prototyped a few years before using that very transformer. Singleended class a all tube signal path, no feedback. Built in volume control and can be used with or without a preamp. I decided to build this small single ended amplifier based on 6l6 vacuum tube using a classic three stage single ended design. In this article a typical single ended tube amplifier circuit has been conversed. I think an amplifier builder should consult with himself and his amplifier before asking the reference books and authorities.

The companion signal generator program uses the sound card for an output. Sep 09, 2017 bg122 a video starting with the basics of reading schematics, slanted towards those involving vacuum tubes. Feb 18, 2019 these days any kind of valve amp attracts a premium price and i thought that building one for myself, daunting prospect though it was, would be a relatively economical route to take. After doing some research it seemed the perfect beginners project was the rh84 single ended amplifier. A very important consideration in attempting to create an amplifier with a natural characteristic is the selection of the gain devices. Using typical operating parameters, the 6v6 power tube, operating in triode mode, has an ideal load impedance of 5k ohm, and generates about 4. The tube amp library of information click the link above for tube amp info, schematics, board building information, projects, mods, transformer diagrams, photos, sound clips.

Singleended amplifiers tend to be bigger and more expensive than pushpull, but they have a more natural transfer curve. Keep those filaments lit, design your own vacuum tube audio. Sep 27, 2014 just like the single ended version, the inductor must never be expected to give up more than twice the idle current. Effectively, each output tube sees a load equal to half the primary impedance. This qualifies as cheap, so i decided to build a single ended 45 amp. This project is recommended for beginning vacuum tube doityourselfers. Had his amplifier been a classa design, either singleended or pushpull, then the highervalued choke might have sounded better. A singleended triode set is a vacuum tube electronic amplifier that uses a single triode to produce an output, in contrast to a pushpull amplifier which uses a pair of devices with antiphase inputs to generate an output with the wanted signals added and the distortion components subtracted. Buying a single ended tube amplifier may be an easier option, but building it at home can be fun and amusing too. Keep this in mind when choosing your first build, anyone can piece together a complex amp. The components for a single mono amplifier circuit are.

The three best sounding designs are presented on the this page. This guide discusses all relevant aspects for an integrated pushpull vacuum tube amplifier design, including the power supply unit. Angela super singleended layout discussion in shock brothers diy amps started by maito, oct 31, 2017. Building a brand new valve amplifier using the rh84 design and offtheshelf components. The configuration is built around two standard tubes viz. Spec said will be get 10w rms with 6l6 but actually never get 10w rms. But, i am not one who thinks only particular topologies work. We must first wear our scientist hat before we can wear our artists beret.

Like ones used for practice or di applications and can easily have a load built in to be used as a pedal for example, a surprise sound labs rock block is a single ended design, though it uses a preamp tube for a 1 watt output. Since 1999 welcome to almost 500 posts and to over 50 articles on amplifiers, tube based preamps, crossovers, headphone amplifiers, single ended amplifiers, pushpull amplifiers, circlotron circuit design, hybrid amplifiers, cascode circuits, white cathode followers, groundedcathode amplifiers, tube series regulators and shunt regulators, the aikido amplifier, tranformer coupling. I have decided to take on a big project, a fullsized, from scratch, singleended triode headphonespeaker amp. I needed a simple single ended amplifier with excellent sound. If the voltage has been entered as peak grid voltage or peak gridtogrid voltage the program converts it.