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Old Electronics

Build a valve amplifier

angelgilardi
hace 6 años
hace 6 años
Hello friends how are you? well, here Angel gilardi with the following query: I am trying to build a valve amplifier with EL34. approximately 100w. I request if someone has and can send me a schematic diagram for the subsequent manufacture of it. This equipment is for my home since I love valve amplifiers, it is not that it is old but it is very good !! from now Greetings to all .. !! Angel Gilardi electronic technician
Manuel H. Cortés
hace 6 años

The sound of the valve amplifiers is superior to that of the solid state.

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pr122
pr122
10.397
hace 6 años
hace 6 años
http://circuitos-amplificados-valvulares.blogspot.com/2013/07/amplificador-valvular-con-el34.html there are countless circuits, with these valves the number 3 will walk you with a magnetic capsule, but look at them all, as I tell you there are hundreds of circuits, the problem is always the exit traffic, since there are no winders left and buy it again they leave very expensive, well ... luck with the project, greetings
angelgilardi
hace 6 años

Thanks pr122. how are you friend? Yes, it is true ... there is no longer a winder and the sound as the audio quality, is superior to any solid state equipment as you said before. I started with the valves and with the Winco record players, in fact, I worked with the official Winco service in my city
Back in the year 1978 ... I'm really a fan of the valves and the old electronics. I was a winding of special transformers and I knew how to wind some of the audio mediamte the formula and later, the calculation of the transformer. I will try to make the audio traphos for this amplifier.

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pr122
pr122
10.397
hace 6 años

I have a UCOA output loop of the ampli A 60 with push pull 6L6 0 EL34, which I have to disassemble to wind it, since it has a branch of the burned primary, when I do it I can pass you the data since I plan to disassemble it very meticulously to arm it as is, but for now I don't have the time to do it, these amps were wonderful to be considered almost high fidelity, I was lucky to meet a DJ jockey in the 70 who used it with 2 Leea columns, master the sound greetings

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angelgilardi
hace 6 años
hace 6 años
Yes, I'm going to try to make the deals for this amplifier and comment. I estimate that in a week I have them and if I can contribute any more comments, I will gladly do so and provide old electronic information. Greetings to all! Angel Gilardi, electronic technician
pr122
pr122
10.397
hace 6 años

well, it is best to disassemble some old or burned traffic, count the turns, the measurement of the wire and re-manufacture it as is, if you are looking for formulas and ways to do it for the web, you will find how it happened to me with countless opinions that confuse you more than they help you, today due to the hi end the winding is different from what it was before, the windings are distributed in parts between primary and secondary so that the amount of wire is the same between the 2 branches of the pushpull, before it was simpler and worked without problems, I wish you good luck, regards

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NewPower Amplifier
hace 6 años
hace 6 años
Regards! I advise you to buy the set of transformers (source, audio output, filter choke), they are already calculated for the circuit voltage values that you use and sound perfect, since everything is expensive it is better to do everything at once , the source transformers can make them without layer to layer, but the audio output is necessary this method, if it is for HIFI better grain oriented, if it is for guitar for example they do them by cutting the frequencies used by this instrument. There are good winders in Buenos Aires, take advantage of them ..., I use Saint Vith and I never had problems, good armed. (Something important, a 50 watt real valve is left over for what you need, 100 watts is already a lot of power to which you can't often take advantage of it).

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