Is that 58 V measured from + to - rail, or from each rail to ground? No chipamp that I know of can handle +/-58 V.
National (TI) makes a driver IC, which requires separate output transistors plus a handful of other components, lme49810. That may be as close to a chipamp as you will get on +/- 58 V rails.
National (TI) makes a driver IC, which requires separate output transistors plus a handful of other components, lme49810. That may be as close to a chipamp as you will get on +/- 58 V rails.
There are several Sanyo STK series chip amps that can handle +/-58V DC rails...
If you design requirement is for 100+ Watts but don't need ultra low distortion those would fit the bill nicely. Some even have pretty low distortion figures, like the STK4048XI:
http://www.pablin.com.ar/electron/circuito/audio/amp205/stk4048XI.pdf
-Charlie
stk4046 kit -
STK4046V Two Channel Class AB Audio Power Amplifier IC 120 Watt RMS Liquidation | eBay
It can run 57vdc right ?
I'd like to see if I can get a protect circuit in the amp as well as if the thing will run the meters.
How is the thing for clarity ? has anyone heard a stk4046V amp
Thanks.
Srinath.
STK4046V Two Channel Class AB Audio Power Amplifier IC 120 Watt RMS Liquidation | eBay
It can run 57vdc right ?
I'd like to see if I can get a protect circuit in the amp as well as if the thing will run the meters.
How is the thing for clarity ? has anyone heard a stk4046V amp
Thanks.
Srinath.
I don't know if the STK series should really be rated that highly. They are after all discontinued, a bit bulky, and they predate the still not complete acceptance of chip amps within hi fi. They are also near impossible to re-source if something goes wrong.
How about unwinding one of your transformers a touch and bringing it down to a more reasonable voltage? Or using them as an original power supply for a regulator (though even then that's a fair voltage drop). You will of course end up with an even lower impedance transformer and something that probably has a higher Va rating than you could normally purchase.
How about unwinding one of your transformers a touch and bringing it down to a more reasonable voltage? Or using them as an original power supply for a regulator (though even then that's a fair voltage drop). You will of course end up with an even lower impedance transformer and something that probably has a higher Va rating than you could normally purchase.
Arguing about output voltage and builing amplifier that suits the power supply...
WTF you can rewind it cant you?
Even if transformer is welded you can grind the welds down and still take it appart and put i together as the small transformers are.
Then you find the chipamp you would like to hear.
WTF you can rewind it cant you?
Even if transformer is welded you can grind the welds down and still take it appart and put i together as the small transformers are.
Then you find the chipamp you would like to hear.
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Rewind the transformer ...
I really cant rewind the trafo. However - I have dead amps in many voltage ranges.
I also have a +/-38vdc - which I know is an easier fit. This amp and chassis etc are beautiful, power meters etc etc ... I want to use that if I can.
Cool.
Srinath.
I really cant rewind the trafo. However - I have dead amps in many voltage ranges.
I also have a +/-38vdc - which I know is an easier fit. This amp and chassis etc are beautiful, power meters etc etc ... I want to use that if I can.
Cool.
Srinath.
You might think about using a couple of L20D class D amp modules:http://www.diyaudio.com/forums/class-d/191739-my-design-l20d-irs2092-irfi4020h-200w8r.html. I did the same thing with an old case and supply recently.
If u r referring to the Leach amp also known as low TIM Leach amp, it works on +/-56 volts.
Leach Amp Plans - Part 1
Gajanan Phadte
I think I would focus on finding an amplifier that can handle the rail voltages that your transformer will generate. You are correct to think about the load, however, I assume you will be using the amp for music. In that case, the average current draw will be much less than the "full power" current, at least 10 times less probably. You can therefore use a smaller VA rated transformer, if you keep in mind that the peak power can not be sustained for more than short bursts (because the PS voltage will quickly sag).
I suggest that you take another look at the class-D amplifiers.
-Charlie
Build this one.
Feed it your +/-58V and in that case you can use just 2 pairs per side, 3 if you want to play it real safe.
http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter.html
Or this one.
Read the thread on how to adapt the basic circuit to different PSU and output power
http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-beginners.html
Both projects have successfully been built by many, offer PCB layout and the Forums are there for you to clear your doubts.
Feed it your +/-58V and in that case you can use just 2 pairs per side, 3 if you want to play it real safe.
http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter.html
Or this one.
Read the thread on how to adapt the basic circuit to different PSU and output power
http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-beginners.html
Both projects have successfully been built by many, offer PCB layout and the Forums are there for you to clear your doubts.
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