It is very seductive to increase the capacity in order to have a low ripple, but doing so will increase the inrush current green. The ps8 circuit board was designed for those who need a highvoltage, bipolar power supply with two sets of regulated heater power supplies. How to design valve guitar amplifiers the valve wizard. The design of basic tube power supplies is actually very straight forward. Ps4 tube power supply on this small 4x4 in, extra thick 0. Apr 29, 2020 the most basic and crude form of power supply design is the one which uses a single diode and a capacitor. Variable dc bench power supply antique radio forums. Isnt a power supply that miscellaneous piece of a project that you ignore until. For example, if the input voltage to the regulator is 330 v, and the output is set to 180 v, with a load current draw of 40.
Training and spice modeling servicesa 2 day class, conducted monthly in. This first one uses a tube that was designed for one tube phonographs. Lt3080, lm317, lm334, lm336 design, pwm, dacs, adcs. Atx bench power supply convert a computer power supply duration. The environment gives you endtoend power supply design capabilities that save you time during all phases of the design process. Classa or b, cathode, fixed bias, and pushpull and singleended designs are covered, as are many frontend circuits.
This book offers a simplified method for designing tube power amps for audio. Starting from the left, we have a fuse, a transformer, a bridge rectifier, smoothing capacitor, and the load. Designing power supplies for tube amplifiers antique. Tubes require power applied to a small filament sometimes called a heater in order to function, as the cathode must be hot enough to thermally emit electrons, and that doesnt happen at. Includes designs using offtheshelf transformers and current production tubes. This power supply modeling software takes a lot of the heavy math out of power supply design and will even provide estimates on how much ripple a power supply will pass to your amplifier. Software for the hp 8903 audio analyzer make professional plots from this affordable audio test system. Tube power supply design its time for a little confession. Design simple linear unregulated mains power supplies, found in tube amplifiers, adjust all sort of settings and values with this neat software. The intention of this article is to discuss the general aspects of the regulated power supply design. Analog power supply design workshop biricha biricha. Classa or b, cathode, fixed bias, and pushpull and singleended. Modern solid state equipment utilises the highfrequency switchmode power supply design to both filter and regulate the output, however the extra complexity, cost and potential unreliability of a switchmode power supply may not be warranted for a tube hifi amplifier when a holistic view of power supply requirements is considered.
It means that the amplifier and the reference voltage do not need to feel the full voltage of the power supply. Tube amplifier power supply unit designer electronic circuits. Available on a cdrom and a downloadable version 4 megabytes. One omission that will be apparent to many readers is any reference to valve vacuum tube rectifiers. It has no sense to have the best tap if you have only few and spotted water to put through. Tube power supply a power supply should provide a precise voltage completely stabilized versus perturbations from any kind, coming both from the ac source or from the load. If you are registered for any of our workshops and find that you are unable to attend due to. Dc power supply board used with the nuclassd or class ab power amps look down the page opamp power supply used with the lr phono, look down the page. The total output is rated at 75 ma, but the voltage regulator circuit uses 15 ma, so the main output is down to 60 ma. I copied this design from a ham radio friend who has been using a similar power supply in his moonbounce amplifier vacuum tube of course for years without problems. The difference between a regulated power supply and a nonregulated power supply is simple. We have all the iron grounded to power line and earth ground for safety.
Because the commoncathode resistor is so large in value, invariably a negative power supply rail is required. Its schematic entry and design management system also includes footprint information for operation with the bartels autoengineer pcb layout and route software. Good power supply design is as important to an amplifier as the ampifier circuitry itself, and while there are literally dozens and dozens of books on switching power supplies there appears to be nothing of. Psu designer ii is designed to help you with the design of simple linear unregulated mains power supplies, as often found in tube amplifiers. The on board power supply uses fred diodes for the bias negative voltages. In the above pic the large valve at the right end corner of the chassis is the rectifier which converts ac from the power tranny to dc. So summarizing our design we have a supply utilizing a transformer 550vct secondary, a 6ca4 rectifier tube, and a 47f input capacitor. The power transformer or pt receives the 120 volt ac supply from your wall socket and ramps it up to two or three times that amount in the first stage of many that provide the voltage that the tubes run on. Power supply design for vacuum tube amplifiers matt renaud, january 2012 introduction its time for a little confession. With one tube atop another and a single heater power supply, the top and bottom heaters cannot share the same heatertocathode voltage relationships. I have been asked to provide some information on power supply design for tube gear, particularly the tradeoffs involved in solidstate versus vacuum rectification, chokeinput versus capacitorinput filters, and various types of capacitors. Poweresim free smps switching power supply transformer. Biricha wds power supply design tool biricha digital.
If it is too high, you may hear it the kawoom when switching. This tutorial presents an easy way to predict the precise dc output voltage you will get from a particular power transformer and reservoir capacitor assuming you. Design, build, and testing of a laboratory linear power supply with constant current control and arduino avr microcontroller control. Vacuum tube power supply design diy audio projects. Switcherpro online or desktop design software allows you to design power supplies with texas instruments tps40k controllers, lowpower dcdc converters and swift tps54xxx pointofload stepdown dcdc products. Wds has been designed as the ultimate toolbox for the power supply design engineer. It would be an understatement to say that this software will more than pay for itself and the time it takes to become proficient in its use the. Click here to download the macos versions of the software approx 3372k bytes. Load regulation is good and we have ample rectifier margin to ensure good operation and long tube life. I started to write sister pcb, but the 5y3 tube rectifier made me change my mind. In a nutshell, this program is a virtual workbench for singleended tube amplifier output stage design. The heater runs directly from the power line requiring no transformer or dropping resistor. Online calculator linear power supply designer changpuak. I copied this design from a ham radio friend who has been using a similar power supply in his moonbounce amplifier vacuum tube of.
Meanwhile, the pt also produces a lowvoltage, but highcurrent, 6. Nov 26, 2011 dave shows you how to design a simple constant current and constant voltage lab power supply that can be either software picavr et. The longtail phase splitter forgoes the negative feedback loop and uses a largevalued, commoncathode resistor to establish its two phases of output signal. The new improved webench power designer makes designing power supplies easy. Modern solid state equipment utilises the highfrequency switchmode power supply design to both filter and regulate the output, however the extra complexity, cost and potential unreliability of a switch. Solid state, vacuum tube types 5ar4, 5r4ggygyagyb, 5u4ggagb, 5v3a, 5v4gga, 5y3ggagt, 5z3, 6au4gt, 6ax4gtgtagtb, 6ca4, 6d22s, 6de4, 6x4, 6x5gt, 6w4gt, 83, ez80, ez81, gz33, gz34, gz37. In the kicad schematic, the part numbers and digikey tm links are listed already. Tube amplifier power supply unit designer electronic. The heater runs directly from the power line requiring no transformer.
Tube amplifier power supply unit designer software psu designer ii is designed to help you with the design of simple linear unregulated mains power supplies, as often found in tube amplifiers. However, to assist in the discussion, the development of a sample power supply to deliver volts at a. You can get this tube and the other parts you need from antique electronic supply. A trio of software programs for the intrepid tubephile. Starting from the left, we have a fuse, a transformer, a. Graphical power supply design this tutorial presents an easy way to predict the precise dc output voltage you will get from a particular power transformer and reservoir capacitor assuming you actually have the transformer available to measure, when delivering a certain current to the load. Powerwitts is an educational tool that allows you to try the most useful alternatives for the various parts of the circuit, building on the experience of the worlds best power supply designers. To clarify the various concepts, many practical examples use el34, el84, and 12ax7 vacuum tubes to design the various parts of the circuits and to compute the values of. Power witts is an educational tool that allows you to try the most useful alternatives for the various parts of the circuit, building on the experience of the worlds best power supply designers. The post details how to design and build a good work bench power supply circuit right from the basic design to the reasonably sophisticated power supply having extended features.
Lt3080, lm317, lm334, lm336 design, pwm, dacs, adcs, lcd. Nov 15, 2019 design, build, and testing of a laboratory linear power supply with constant current control and arduino avr microcontroller control. The voltage output of a nonregulated supply will change depending on amount of current drawn from it. It contains a rectifier and a power amplifier in the same envelope. John erringtons tutorial on power supply design skillbank. Vacuum tube audio amplifier discrete semiconductor circuits. Use switcherpro power supply design software to create, manage and share custom power supply designs. Switcherpro online or desktop design software allows you to design power supplies with texas instruments tps40k controllers, lowpower dcdc converters and swift tps54xxx pointof. Sometimes i get excited about my latest circuit and after looking for just the right tubes, output. Psud2 last updated 22112019 intro psu designer ii is designed to help you with the design of simple linear unregulated mains power supplies, as often found in tube amplifiers. The power supply actually has two different power outputs. I dont always spend as much time on my power supply designs as i should. Any convenient, safe connector can be used for the supply outputs. I simulated this circuit and found that it could give the required gain and almost the required output impedance.
Its schematic entry and design management system also. And, if we rely on the excellent work of those whove come before us. Webench power designer creates customized power supply circuits based on your requirements. This has been tried with dozens of tubes of several types, mostly 45s, 2a3s and 300bs. The power supply on a separate chassis solves the problem of the power tranny external magnetic field contaminating the valve amps electronics, whereas a monoblock does not. Datasheets for different inductors and the power fet. Include many smps and power electronics circuit, schematics, topologies, theory of operation, application note, circuit analysis, on line educational course material. The environment gives you endtoend power supply design capabilities that save you time during all. Tube operation is explained, as are circuit principles. In all, power supply designer designs, simulates and verifies your entire power system, or any analog, mixedsignal or mixedsystems design. Sometimes i get excited about my latest circuit and after looking for just the right tubes, output transformers, coupling caps, and low noise resistors, the power supply design becomes almost an. Interface technologies engineering software and services.
So a transistor circuit can be used to regulate 3000 volts by controlling a single tube and you. It must power a 12v dc motor which runs for long periods of time and in normal use draws a maximum of 2a from the supply. From power stage component selection to poles, zeros and controller coefficients. Contrary to the firmly held beliefs of some, they have exactly. A filter capacitor makes sure that after rectification, at.
Since a single diode will rectify only one half cycle of the ac signal, this type of configuration requires a large output filter capacitor for compensating the above limitation. Select an output transformer and a power tube from the builtin libraries. Founded in 1993, interface technologies provides engineering software and services to electrical engineers worldwide. This first part deals with rectification smoothing capacitors. I have been asked to provide some information on power supply design for tube gear, particularly the tradeoffs. Designing power supply circuits simplest to the most. For example, if the input voltage to the regulator is 330 v, and the output is set to 180 v, with a load current draw of 40 ma the beam power tube dissipates 330 150 v. Duncan psu designer ii now that you have a general understanding of what goes into a power supply and roughly what each part does, take a look at duncan psu designer ii software. Vacuum tube audio amplifier discrete semiconductor.
This power supply modeling software takes a lot of the heavy math out of power supply design and will even provide estimates on how much ripple a power. Guide to vacuum tube amplifier design this free guide discusses all relevant aspects for an integrated pushpull vacuum tube amplifier design, including the power supply unit. With the help of duncanamps psudesigner free software, we can easily. Dave shows you how to design a simple constant current and constant voltage lab power supply that can be either software picavr et. Poweresim free smps power supply design and transformer design, magnetic design, simulation, circuit analysis software. Good power supply design is as important to an amplifier as the ampifier circuitry itself, and while there are literally dozens and dozens of books on switching power supplies there appears to be nothing of value out there on the linear power supplies that we need to build tube amps.
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