As Andrew said, take care of SOAR. Don't just Increase rail voltages. as this is only transistorized design I would say Simulate it using Pspice. I would suggest you to add one 4700uf parallel to existing. this would help you to handle ESR of Caps. Also save bucks of buying new 10,000uf caps.Have you thought of modifying heat sink? wont increase in rail voltages also change the thermals of the design.
But now you have everything with you to build a complete new amp. So DIY the same amp and leave this baby untouched. ( also later you can compare who shows better workmanship. 😀)
But now you have everything with you to build a complete new amp. So DIY the same amp and leave this baby untouched. ( also later you can compare who shows better workmanship. 😀)
Hi Guys,
thanks a lot for your comments and suggestions!
I want to say one thing that might not be clear enough: I was never planning to increase the rail voltage of that little amp, only the VA rating of the transformer, that's all! In a larger enclosure I would also use bigger heatsinks, but only because of the increased hight of a new enclosure.
When it comes to "workmanship" I would say this is not exactly my style...
What I build in the past few years looks more like this:
1) Audio Sector LM3875 (with integrated USB DAC and remote volume control)
2) Elliott Sound Products P3A
3) UB Audio HighAmp 100 (with TDA7293)
4) Holton Precision Audio nxV200
5) A simple Passive Pre (build for a friend of mine)
Just some examples, and just for fun 🙂
Regards!
Martin
thanks a lot for your comments and suggestions!
I want to say one thing that might not be clear enough: I was never planning to increase the rail voltage of that little amp, only the VA rating of the transformer, that's all! In a larger enclosure I would also use bigger heatsinks, but only because of the increased hight of a new enclosure.
When it comes to "workmanship" I would say this is not exactly my style...
What I build in the past few years looks more like this:
1) Audio Sector LM3875 (with integrated USB DAC and remote volume control)
2) Elliott Sound Products P3A
3) UB Audio HighAmp 100 (with TDA7293)
4) Holton Precision Audio nxV200
5) A simple Passive Pre (build for a friend of mine)
Just some examples, and just for fun 🙂
Regards!
Martin
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Hi,
look at it the other way:
Build a 35+35Vac 600VA +-20mF/channel two channel stereo amplifier that puts out a maximum of 110W+110W into 8r0.
Try this for a few milliseconds or a few hundred milliseconds or even for a couple of seconds.
Now take the same amplifier, swap out the 600VA to replace it with a 35+35 200VA transformer. Swap out the +-20mF and replace it with +-4700uF per channel.
Now test that combination for maximum output power.
I will guarantee the medium and long term powers will be down by at least 2dB
The output devices will be under much less stress when the wimpy PSU is in place.
look at it the other way:
Build a 35+35Vac 600VA +-20mF/channel two channel stereo amplifier that puts out a maximum of 110W+110W into 8r0.
Try this for a few milliseconds or a few hundred milliseconds or even for a couple of seconds.
Now take the same amplifier, swap out the 600VA to replace it with a 35+35 200VA transformer. Swap out the +-20mF and replace it with +-4700uF per channel.
Now test that combination for maximum output power.
I will guarantee the medium and long term powers will be down by at least 2dB
The output devices will be under much less stress when the wimpy PSU is in place.
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