Can see down the road seems there was variables how good performance some builds and their layout gets, therefor share that in past we many time guided by specialists to get sense point as forward to load as possible maybe with remote wire, and performance will measure much better. Not specialist myself and have not lab gear to confirm but see below what was suggested to application as this and 78/79xx plus LM series, below schematic is half part taken from schematic into post 147
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Hi,
I am have some problem trying to open the gerber files under the MCN Gerber viewer, do you experience the same thing?
Regards
I have tried to open schematic in post#1, with different browsers but to no avail. Curious what's behind that closed door, Anybody...
I did not know folks can't see the schematic. Here it is reposted from DIYA server.
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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.
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.
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Isn't it great that those convertors do actually work - I've always been a bit hesitant because of the expected 'noise' but .....
This may sound a bit weird but try replacing that 10,000uF cap with maybe a 2,200uF one or even a 470uF, particularly if you happen to have those Nichicon BPs (the green ones)
As you have noticed, there's a whole variety of C-multipliers - one that's not often seen these days is the 2 transistors in series version- not sure where details would be now but some other reader might be able to locate it
This may sound a bit weird but try replacing that 10,000uF cap with maybe a 2,200uF one or even a 470uF, particularly if you happen to have those Nichicon BPs (the green ones)
As you have noticed, there's a whole variety of C-multipliers - one that's not often seen these days is the 2 transistors in series version- not sure where details would be now but some other reader might be able to locate it
I tried using with various size uF caps on the Cx which im drawing +/-18V at 5amps per rail for a total of 10 amps per class A monoblock. Later it was simmed and showed maybe an improvement of 1 maybe 2 db across the audio band. I just went with low esr caps and on C7 I paralled 5 x 1000uF, just because...
I think the difficulty may lie in getting HV caps - look for industrial motor run caps which are 50uF and 250v or 450v even.
Vishay makes a 600v n channel MOSFET in TO247 package:
http://www.vishay.com/docs/91473/sihg22n60e.pdf
There may be a lack of P channels so basically make two identical N channel cap Mx and connect in series to get positive/negative.