Hello I'm a Slovakian student of electronics and I bought a brutal transformer for a low price . I got a 1500W 45W simetric transformer for 40 euro . I'm in search of a relay great sounding solution class A or tube audiophile sounding multichanel amp project please give me your thaughts
I think some sarcasm was missed.
Did you perhaps mean to say a 1500W or 1500VA +/-45VAC transformer?
Did you perhaps mean to say a 1500W or 1500VA +/-45VAC transformer?
Read back your message and ask yourself, what usefull information is there on the transformer 😕
And that from a student electronics, i asked myself, what are they learning today 🙁
Mona
exactly 1500VA +/- 45V
Sorry in not the best in english Ketje didn't quite understand your question
Sorry in not the best in english Ketje didn't quite understand your question
1500VA is a BIG transformer.
What everyone is asking is what voltage and configuration the output wires are. Which of these is it ?
1/ Is it a single 45 volt AC winding (two wires)
2/ Has it two separate 45 volt windings (four wires)
3/ Is it a 'split' winding of 45-0-45 (three wires)
What everyone is asking is what voltage and configuration the output wires are. Which of these is it ?
1/ Is it a single 45 volt AC winding (two wires)
2/ Has it two separate 45 volt windings (four wires)
3/ Is it a 'split' winding of 45-0-45 (three wires)
active amplifier is the way to go. Make 2 capacitor banks.
Evantually you may really just use 30 W for tha amps doing nothing and 6 W for loud music, but its about, how can it supply small peaks / follow the signalexactly, that influence the quality of your sound.
Evantually you may really just use 30 W for tha amps doing nothing and 6 W for loud music, but its about, how can it supply small peaks / follow the signalexactly, that influence the quality of your sound.
two separate 45V windings yes a beefy capacitor bank is in plan
symetric winding means two windings of the same voltage but separated
symetric winding means two windings of the same voltage but separated
YouTube
eevblog bypass capacitors
maybe make 2 active and 1 subwoover. Have to think it through, each amplifier block would need its own set of bypass capacitors, optimised for the frequency range.
But there is one problem: when you swithc on, there is a huge current charging the transformer and the caps, so you may need some slow start option or wire a bulb tester in
Powering Your Radio Safely With a Dim-bulb Tester
this implies your electrical skills are better than your English skills. Or contact an electrician.
eevblog bypass capacitors
maybe make 2 active and 1 subwoover. Have to think it through, each amplifier block would need its own set of bypass capacitors, optimised for the frequency range.
But there is one problem: when you swithc on, there is a huge current charging the transformer and the caps, so you may need some slow start option or wire a bulb tester in
Powering Your Radio Safely With a Dim-bulb Tester
this implies your electrical skills are better than your English skills. Or contact an electrician.
the transformes has a 25 amp measured current spike on the primary side (230V)
so some kind of slow start will be neded
For bypass caps I think about 10.000uF per voltage rail or even more many caps to get a lower esr
I'm bit of a electrician so no problem there
so some kind of slow start will be neded
For bypass caps I think about 10.000uF per voltage rail or even more many caps to get a lower esr
I'm bit of a electrician so no problem there
The big problem here is the voltage. 45 volts AC means around 63 volts DC per rail.
Making AC coupled single rail amplifiers is a possibility, 63 volts is actually ideal for that, and having two physically separate windings means you could build a dual mono construction.
A soft start seems pretty much essential although at 1500VA the transformer is bigger than most. You would need to research suitable designs for that.
Making AC coupled single rail amplifiers is a possibility, 63 volts is actually ideal for that, and having two physically separate windings means you could build a dual mono construction.
A soft start seems pretty much essential although at 1500VA the transformer is bigger than most. You would need to research suitable designs for that.
If you want as many amps as possible class AB would be better due to efficiency. Are you committed to class A?
You mentioned P101, I presume you mean this Project 101 - High Power, High Fidelity Lateral MOSFET power amplifier it's a good class AB amp and would work well with your power supply
You mentioned P101, I presume you mean this Project 101 - High Power, High Fidelity Lateral MOSFET power amplifier it's a good class AB amp and would work well with your power supply
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The voltage of your supply limits your options for class A, I suggest you ask on the Pass Labs forum
to pass or not to pass that is the question
if it wouldnt be class a only what would you recomend me ?
if it wouldnt be class a only what would you recomend me ?
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