| Filter caps - K100-2 [message #23034] |
Wed, 03 June 2015 17:06  |
gui_tarzan
Messages: 24
Registered: May 2015
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Junior Member |
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So the stock caps are 2500mfd, 50v and I have some 2200/50v but they're TINY compared to the originals. I know, they're large cans vs small radials, I'm just unsure if they're big enough physically or if it even makes a difference?
--Jim
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| Re: Filter caps - K100-2 [message #23035 is a reply to message #23034] |
Wed, 03 June 2015 18:15  |
chicagobill
Messages: 2006
Registered: April 2003
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Senior Member |
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Size doesn't matter. Well at least physical size doesn't.
The original Mallory caps were called "computer grade", which meant that they were designed to a higher standard than normal consumer grade caps. That is part of the reason that they have lasted so long.
Modern caps are much smaller than old caps, but the trade off is that they don't seem to last as long.
In the rare occasions that I need to replace them, I use the larger sized "snap-in" caps, which come in larger diameters. I will either build a small circuit board to hold the new caps in place that has screw in contact points to connect the original wires to or I use some sort of thick ring to adapt the smaller diameter caps to the size of the original cap clamps.
Some folks like to increase the value of the caps to double or triple the original ratings.
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| Re: Filter caps - K100-2 [message #23043 is a reply to message #23034] |
Thu, 04 June 2015 21:58 |
gui_tarzan
Messages: 24
Registered: May 2015
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Junior Member |
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Fortunately I didn't have to get into the caps, I cleaned the jacks and pots and the raucous hum went away so my guess is one of the input jacks wasn't shorting correctly.
--Jim
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| Re: Filter caps - K100-2 [message #23050 is a reply to message #23034] |
Fri, 05 June 2015 08:18 |
stevem
Messages: 4775
Registered: June 2004
Location: NY
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Senior Member |
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To this day I am still no sure that the original big can type filters do not make for less power supply sag at high output levels as compared to new smaller ones!
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