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Old 16th September 2004, 04:34 PM   #1
hacknet is offline hacknet  Singapore
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Default MKP in the Powersupply.

i`ve come across the GE MKP caps that madisound is selling at resonable prices. are these caps any good for power supply filtering?

i`m intending to use the 10uf 400vdc in a 330v psu drawing 100ma constantly.

are these caps fit for the bill or am i better off with electrolytics?

Thanks!
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Old 16th September 2004, 06:06 PM   #2
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Default GE MKP Caps

hacknet,

I am not so familiar with those GE MKPs but I have used many times ASC MKP/OIL (www.angela.com)which are excellent performers for PSU.Although I have tried using them as a coupling caps in loudspk. XO and found in comparison with SOLENS MKP to be more fatigue and with grainy mids.I suppose GE are good for PSU and definitelly better in all aspects than normal elco's.If you go for elco's it would be cheaper.Depends how much money are you willing to invest for the amp.But before you buy GEs make price comparison with the SOLENs and ASCs.You will not make mistake in either way!
My 0.02$

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Yugovitz
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Old 16th September 2004, 06:31 PM   #3
hacknet is offline hacknet  Singapore
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it works out that the GEs are cheaper buy a small margin. i wonder how would they perform. its stated that the GEs have an ESR of 3 miliohms. is this good?
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Old 16th September 2004, 08:27 PM   #4
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Hi,

MKP caps are metallized polypropylene caps.

As long as the voltage rating is respected they'll work just fine in a PSU.
In fact they'll work better than almost any electrolytic cap thanks to their much lower ESR, they don't dry up either and don't require forming.

For adequate ripple filtering you're quite likely going to be needing more than 10F however.

Cheers,
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Old 17th September 2004, 03:26 AM   #5
hacknet is offline hacknet  Singapore
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oh, i forgot to state.

its going to be

30uf->30H->40uf

i`m building kt88 single ended monoblocks drawing 100ma at 330v. is this enough?
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Old 17th September 2004, 04:14 AM   #6
Alex S is offline Alex S  Singapore
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I built my 300B monoblocks with all polypropolene (Solen 630V) power supply. What's more, bypassed with Rel and MIT caps!

per monoblock:
100uF (2x 51uF) -> choke -> 150uF (10x 15uF) -> drop resistor -> 60uF (3x 20uF, for input stage)

but that was 10 years ago ('94) when I believed in 'overkill'. LOL!
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Old 17th September 2004, 11:41 AM   #7
hacknet is offline hacknet  Singapore
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i was thinking of overkilling too... but decided against it as i heard that too much capacitance actually kills the dynamics...
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Old 17th September 2004, 01:49 PM   #8
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Quote:
Originally posted by hacknet
I heard that too much capacitance actually kills the dynamics...
Just where *do* some people get the nerve to make up these ridiculous ideas, therefore misleading others??????
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Old 17th September 2004, 02:10 PM   #9
Magura is offline Magura  Denmark
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You can sleep well and with no concern about toomuch capacitance killing the dynamics...at least till you hit 200,000uF per monoblock....cuase thats what we use around here, and we got loads of dynamics

Magura
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Old 17th September 2004, 03:09 PM   #10
hacknet is offline hacknet  Singapore
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oh is that so!!

okay... now i`ll happily tonn more capacitance after the choke.... is what i`m doing that correct? is the a model supply i can look at?
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