Just look here or schematic below;
DCPP Amp
Look for dotted square called B+ ripple filter.
Works like a charm, I often use it.
BR,
Eric
Attachments
IRF840's will do and easy to find - plenty of others - can also use plain transistors, maybe darlingtons, etc
Motor run capacitors are usually plastic film type and rated for 250Vac (roughly equivalent to 400Vdc).
Motor start capacitors are sometimes electrolytic. I don't recommend these even though they are rated for short term use on 240Vac mains systems.
If you need 300Vdc to 400Vdc capacitors, then motor run capacitors are about as good as you will ever need.
There may be some motor run caps rated for 400Vac (across the phases of a 3ph supply). These should be good for voltages upto 550Vdc, but do check with the manufacturer.
I have used these in my audio circuits with great success. They sound very nice. They are liquid filled plastic film and designed to be pounded by large 240vac currents for years on end. I don't think there is any reliability issue - just huge in size.
This is 50uF 370vac (520vdc?)
https://www.amazon.com/TEMCo-Motor-Run-Capacitor-RC0015/dp/B00FBRWUP0
This is 50uF 370vac (520vdc?)
https://www.amazon.com/TEMCo-Motor-Run-Capacitor-RC0015/dp/B00FBRWUP0
Strange. No I did not do anything strange. Try this one from eBay same thing.
50 MFD 370v Round AC Electric Motor Run Capacitor HVAC 370 vac v volts 50 uf
This is manufacture website:
https://www.temcoindustrial.com/rc0015-motor-run-capacitor-50uf-370-volt.html
50 MFD 370v Round AC Electric Motor Run Capacitor HVAC 370 vac v volts 50 uf
This is manufacture website:
https://www.temcoindustrial.com/rc0015-motor-run-capacitor-50uf-370-volt.html
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Actually, 'chat' was asking for components for a high voltage (150 - 250V) equivalent of juma's C-Mx on 1st post this thread - excellent performance can be expected from the 'motor' caps but there's no real reason that electro caps will still create a good result - what's that saying about 'a horse and a cart' ...
Apart from different circuits that have been suggested to me which I'll try them out. (I find changing PSU do effect the sound and it's a lot more fun than changing coupling Cap 😀)
The circuit in post 1 can be used for higher voltage provided appropriate components are used. However big 4700uf cap might be a problem. I'll try smaller value i.e. 470uf and see if I like it.
The circuit in post 1 can be used for higher voltage provided appropriate components are used. However big 4700uf cap might be a problem. I'll try smaller value i.e. 470uf and see if I like it.
I will have those 4x22.000uf 63V in CRC config in front of the two capmu
like that heatsinks
Is there a place where to buy
Is this applicable for a dual rail PS?
Can I use this configuration for a low current (< 100 ma) application that uses a dual rail power supply (+- 32 volts dc)? This is provided by a 25-0-25 AC transformer followed by a bridge rectifier and associated capacitors (9400 uF for each rail).
I just put another Easy Peassy Cap Mx into my SE Class A headamp. Using IRF540 MOSFET for 20v output. Fed by XL6009 step up DC-DC converter.
Bass authority seems to have improved noticeably. Amp was already quiet and now absolutely dead quiet.
Particulars: IRF540, 10k & 220uF cap and feedback, 1N4007 protection diode, 220R gate stopper, 1uF 230v MKT and 1.1R snubber, 10mF 25v output reservoir cap. Takes about 20 seconds to slowly turn on - so it's a nice soft-start feature to avoid turn on/off thump. Since current is only 100mA, using local heatsink for 400mW.
Can I use this configuration for a low current (< 100 ma) application that uses a dual rail power supply (+- 32 volts dc)? This is provided by a 25-0-25 AC transformer followed by a bridge rectifier and associated capacitors (9400 uF for each rail).
That should work just fine - I am using it for head amp with 100 mA current.
I want to build this capacitance multiplier, but I always prefer to use a PCB. Does anybody know where one can buy a PCB? If yes then please post the details of seller etc. Cheers,
Use a higher gm device.
Vertical mosFETs are generally higher gm, BJTs are much higher than all FETs.
Vertical mosFETs are generally higher gm, BJTs are much higher than all FETs.