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Old 10th January 2004, 04:59 AM   #1
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Default Newbie question : Plate CCS

Can anyshows me how do we installed a CCS in order to replace Plate Resistor...
I've built GE-12B4A preamp... it uses 12K plate resistor, 500Ohm and 360uF on Cathode and it's running at ~15mA...

How do I replace this resistor with CCS circuit....
hope someone can show me how to do this...
Thanks....
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Old 10th January 2004, 11:57 AM   #2
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Depends on the CCS...

Some have 3 "poles" other 2 "poles"

If you have DN2540...like K&K AUDIO sells..for around $20 a pair there are clear instructions how to replace your resistor.

http://hometown.aol.com/kevinc927/index.html

I have a CCS with that mosfet listed on my site as well. It is the simple CCS.

http://home.zonnet.nl/horneman/mosfet.htm

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Bas
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Old 10th January 2004, 02:21 PM   #3
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Nice web site....
btw how much current and voltage can flow thgrough your design...?
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Old 10th January 2004, 09:07 PM   #4
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Hi Mas,

The designs are by other people I just put them up on my site :-) Hence the "funny" name for the CCS.

150mA max current and 400v is max voltage...but the max power dissapation is something like 15 watt. Meaning running it at 150mA will run it too hot very fast...(I think)

(See datasheet also on my site or do a search for DN2540)

But 15mA is well within its limits....

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Bas
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