@tombo56
Hi again,
I am almost done building the R21 supply boards!
For a single channel/monoblock, I have an amp I am building that requires +/- 40VDC @1.5A quiescent. I will be using either 400VA or 500VA for each monoblock and with a rectifier board based on LT4320. According to my calculations it appears that a transformer with 32V secondaries would be appropriate with enough headroom for supply variation and mains variations.
Do you agree?
Thanks,
Anand.
Hi again,
I am almost done building the R21 supply boards!
For a single channel/monoblock, I have an amp I am building that requires +/- 40VDC @1.5A quiescent. I will be using either 400VA or 500VA for each monoblock and with a rectifier board based on LT4320. According to my calculations it appears that a transformer with 32V secondaries would be appropriate with enough headroom for supply variation and mains variations.
Do you agree?
Thanks,
Anand.
Yes, I agree.
With that load of 400-500 VA transformer and nominal 32V secondary voltage, expected voltage before regulators is about 42V – 43V max.
With that load of 400-500 VA transformer and nominal 32V secondary voltage, expected voltage before regulators is about 42V – 43V max.
@tombo56
Boris!
Thank you so much for your magical supplies! What a wonderful build experience! Love the green/red LED indicators!
This will work great on my upcoming monoblocks I am building.
Relevant details for other diy’ers: Caps used are KEMET 22mF, Mundorf AG 2200uF slit foil and Sonicap 2.2uF.
Thank you @birdbox @codyt @Vunce @ItsAllInMyHead
Kind regards,
Anand.
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Hi Anand,
I’m happy to see such a superb build. It will provide an excellent performance, no doubt.
You could eventually, add an another output connection wire between R21 module and the main supply board. You have two input interconnections and one for output, while 3 connection points are available for input and output (visible on the last picture). But, it is good as is now.
I’m happy to see such a superb build. It will provide an excellent performance, no doubt.
You could eventually, add an another output connection wire between R21 module and the main supply board. You have two input interconnections and one for output, while 3 connection points are available for input and output (visible on the last picture). But, it is good as is now.
Fantastic assemblies Anand!
Top notch components 😉
Couple more MadMax R21 modules going out in the wild. The out of regulation red LED indicators are such a neat tuning feature, Tombo nailed this one.
Looking forward to see what amplifier these become the foundation of power for.
Top notch components 😉
Couple more MadMax R21 modules going out in the wild. The out of regulation red LED indicators are such a neat tuning feature, Tombo nailed this one.
Looking forward to see what amplifier these become the foundation of power for.
Look carefully ;-) There are grey 18AWG wires next to the Mundorf caps that connect the output to the board as well. I thought of using red wires which would be much more visible!
Overall 15AWG each for input, output and ground.
Best,
Anand.
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