I tested the power supply which you may recognize as the pcb for the john linsleyhood simple class a amplifier 1996 version from williams hart electronics. Jean hiraga super class a amplifier mono and stereo. As youd expect, image outline sharpness with the big 15inchers was less acute than over the albedos which i had hiraga listen to for a few tracks to help him acquire a baseline impression of the room and system. Jean hiraga 12ax7 ecc83 singleended kt88 tube amplifier schematic jean hiraga s singleended kt88 tube amplifier schematic with 12ax7 ecc83 tube input stage. Jean hiragas super classa amplifier electronics infoline. This is then often taken to even more extreme levels by audiophiles of today that can get large capacitors relatively cheaply compared to the cost in the seventies when the. I am very pleased with the sonic results of this amplifier. However, most interesting in a circuit is not the circuit itself, but its. It been driving my tannoys with ease while the arc was in the hospital. With the exception of the output transistors and their driver transistors, this diagram can be remade starting with other transistors of european. As mentioned in my short hiragapost a while ago, i have also been trying my hand at hiragas le monstre design.
This is a set of two pieces of pcb of a stereo class a amplifier with ultrafi sonic quality. However, due to the unavailability of the original power transistors, i opted for a more robust output stage using toshiba 2sa1943 and 2sc5200 complimentary transistor pairs. Based on some customer feedback, we have change the collect resistors to noninductive 1 ohm 5w type. Internally there are bitumen and felt liners, a cross brace with strategic tuning slots and a downfiring port thats slotloaded into the integral plinth. This is a good ic with many built in features like low harmonic distortion, short circuit protection,thermal overload protection etc. Honestly some amp excelled in some area but overall the 20w had a. Hiraga 20w classa amplifier reworking riki buckingham. The 20 watter is one of the best transistor amplifiers in the world, the sound is very smooth and airy, almost tubelike. Schematic diagram of a simple 7 watt audio amplifier using tda2003 amplifier ic. This amplifier was original built into an old car amplifier chassis using the original 12v to 24v smps. The red monstre is built on a set of pcbs from ebay seller jimsaudio.
This kit have everything what you need to make your own a class 30w amplifier. Jean hiraga s super classa 30w amplifier schematic and pcb i used the original board layout shown in the magazine article figure 1 as well as the original driver transistors. Internally there are bitumen and felt liners, a cross brace with strategic tuning slots and a down. For this circuit, this accommodation constitutes a practical.
Jun 09, 2019 nice work there, have you got any experience of the super class a hiraga. Ivex software free demo of their pcb and schematic software bbyists. As the schematic reveals, there is a lot of opportunity to play around. This ic is a upgrade version of tda 2002 amplifier ic. Ive build several hiragas 20 watt amplifiers and le monstres too. This is our collection of diy and hifi audio schematics. This amp is designed for high 1f capacitors and 12v rechargeable batteries. Subtitled an homage to the we 25 b, the piece celebrated classic simplicity in amplifier design, specifically a western electric amplifier that used a single gain triode. The biggest collection of hiraga manuals and schematics. This page was last updated on 16 july 2001 back to index the monster revisited. Ive build several hiraga s 20 watt amplifiers and le monstres too. To further improve the robustness and thermal stability of the amplifier, we put in 12w. Sep 02, 2014 jean hiraga s super classa amplifier 30 watt classa sony vfet output. Does somebody can tell me which psu is adequate for 20w hiraga.
In 1985 jean hiraga wrote an article in two parts presenting, among other things, a design for a very simple mosfet amplifer called the nemesis. General description this is an exceptionally well designed amplifier, with a lot of power reserve, high fidelity, low distortion, good sn ratio, high sensitivity, low consumption and full protection. Found 200 records in search of high efficiency speaker asylum 1. Having all these almost ideal characteristics this amplifier is likely to become the basic building block of your future. Jean hiraga super class a amplifier our stefano bertoncello is building a hand made clone of the jean hiragas 20w super classa amplifier.
It is the simplest of circuits should anything go wrong. The monstre is a simple 8w class a amplifier that originally ran off a huge 12v battery supply. Please be carefull with those devices due to high voltage loaded inside the capacitors. Honestly some amp excelled in some area but overall the 20w had a better sound.
I had it directly against the hiraga monster, the gainclone and the pass f5 and liked the 20 watts better. March 16, 2018 by bonsai in amplifiers, power amplifiers. A build of jean hiragas 20w classa amplifier project using current. Mono and stereo is a magazine in continuous evolution, frequently delivering content most relevant to our readers. Its quite a rare beast, is big, heavy, class a but doesnt cook the room. However, due to the unavailability of the original power transistors, i opted for a more robust output stage using toshiba 2sa1943 and 2sc5200 complimentary. Jean hiraga 12ax7 ecc83 singleended kt88 tube amplifier schematic. Arch nemesis by nelson pass introduction a poster of einstein once said, things should be made a simple as possible. Even using fairly standard 3 way speakers in a large room, surprisingly there is ample power. What strikes the most is the ability of this amplifier to differentiate between instruments and noises in the sound stage. Jean hiragas super classa amplifier diyaudioprojects.
The original transistors used by hiraga are no longer available. Hiraga kaneda solid state preamp with phono mm location. Jean hiraga 12ax7 ecc83 singleended kt88 tube amplifier. Jean hiragas super classa amplifier 30 watt classa sony vfet output. One can make all progress which one wishes in the field of electroacoustics, it will nevertheless remain that all these systems always return to an. We offer several kits of different designes based on the genius designes jean hiraga has done.
What transistors did you use in that build the original schematic looks to specify y grade 2sk170j74 which arent exactly easy to source. Kakav sam, naopak, prvo sam napravio slozenije pojacalo vece snage pa tek onda jednostavnije i slabije. On the onken bass enclosure, the impedance goes up to nearly 70 ohm, between 15hz and 50hz. Power hiraga power supply for the le monstre amplifier. An electrostatic loudspeaker 100% personal design with trapezoidal shape, registated design in 1982. Jean hiragas singleended kt88 tube amplifier schematic with 12ax7 ecc83 tube input stage. Jean hiragas super classa amplifier diy audio projects. Jean hiragas 20 w class a design became something of a cult amplifier in the 1980s in the audio community and constructors from europe, australia, japan and the usa praised its sonic performance. I bought this from jake the last year as a standby amp, but need funds.
One can make all progress which one wishes in the field of electroacoustics, it will nevertheless remain that all these systems always return to an impossibility. Sound jean hiragas classa 8w amplifier you will be very pleased with the sonic results of this amplifier. The hifisonix kxamplifier is a 28 watt class a diy current feedback cfa power amplifier featuring low. Thats the only solid state product i use, and only because tubes are to noisy at such low levels. In 1985 jean hiraga wrote an article in two parts presenting, among other. Mar 29, 2018 hiraga 20w classa amplifier re working posted on march 29, 2018 march 29, 2018 by rixsta this amplifier was original built into an old car amplifier chassis using the original 12v to 24v smps.
Jul 02, 2015 sound jean hiragas classa 8w amplifier you will be very pleased with the sonic results of this amplifier. They have a good reputation for sound quality, but this is not an aspect i have been able to verify personally. Schematic by jean hiraga described in laudiophile, a disappeared highend french revue. A very simple design where each element has to be chosen with extreme care. Jean hiraga super 30w classa amplifier schematic and pcb. Le classe a diy jean hiraga super 30w class a amplifier. Jean hiraga classa amplifier new fifth 5 individual project part two final. It was apparently created as the demo amp for a certain speaker manufacturer hence the expolinear badge. Power hiraga power supply for the le monstre amplifier pcb. We offer you for all designes serveral kits and materials. Jul 08, 2016 jean hiraga classa amplifier new fifth 5 individual project part two final. Jean hiraga classa amplifiers the following two designs by jean hiraga were originally published in the french magazine laudiophile. With a number of different kt88 tube amplifiers we have had good results using new production jj kt88 blue glass and genalex gold lion kt88 tubes.
Ovaj projekat je trebao da bude pokazna vezba kako sa sto manje novca, bez preterivanja, napraviti pojacalo a klase koje pristojno zvuci. Hiraga manuals, schematics and brochures hifi manuals. Hiraga s now available creation is an oldfashioned broadshouldered big box in butcherblocked 30mm solid beech dress and a plethora of unsightly screws around back. The modification ended up taking 4 days instead of the 4 hours i. We offer you for the hiraga amp 20w serveral kits and materials. A tube amplifier for electrostatic headphone based on a schematic from stax julyaugust 1993 pages 58 to 66. Due to a much better power margin, thermal drift of resistance due to temperature variation is minimized.
A build of jean hiragas 20w classa amplifier project using current production. I will open it up and check it out tomorrow on my day off. The amplifier is called super 30w class a which implies it can gives 30w of power with operation in class a. Hiraga kaneda solid state preamp with phono mm classifieds. Having read jean hiragas article construction of a 20w classa amplifier and in copies of the old french magazine laudiophile, i was interested to hear for myself how le monstres bigger brother. This is a kit of class a amplifier with ultrafi sonic quality. Jean hiragas super classa 30w amplifier schematic and pcb i used the original board layout shown in the magazine article figure 1 as well as the original driver transistors. Ive got some of the jims audio boards with the onboard frontend regulation somewhere. The ideas expressed herein are the opinions of the author expressed under his first amendment rights and therefore their value and truth should be determined by the readers for themselves. Mount the main rectifier bridge d4 on the bottom side of the pcb as shown in the layout drawing. Hiraga is probably most known for his le monstre design a small 8w class a amplifier and for his use of massive amounts of capacitance in the power supplies.
At the present time it is difficult to find diagrams of high quality class a amplifiers, moreover, the circuit described offers many benefits, in particular a great simplicity of construction. The classa amplifier site hiraga 20w classa elliott sound. Diy hiraga 20watts class a amplifier for sale canuck audio mart. If you have built any of these circuits, we would love to hear from you so send us your comments. Feel free to send us your hifi audio schematics and we will add them here. After building and listening to jean hiragas le monstre, a 8w classa amplifier, i wanted to build le monstres bigger brother the 20w class a amplifier. With this power, the rate of distortion reaches practically 1%. It is precisely in these regions that the amplifier must best control the loudspeaker. A very high performance 28 watt class a current feedback amplifier. This uses the original transistors except the output transistors which are newer mjlmjwtypes but the. Amplifier schematic diagrams, free amplifier schematic diagrams software downloads, page 3.