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Old 13th April 2007, 06:02 PM   #1
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Question Ccs

I've been searching for a site or information on Gary Pimm's CCS's outlining how to calculate circuit values for specific loads. Can anyone please help? The attachment will be the victim of the CCS.
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Old 13th April 2007, 09:39 PM   #2
jeapel is offline jeapel  Canada
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hi here is:
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Old 13th April 2007, 09:49 PM   #3
jeapel is offline jeapel  Canada
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here is the guide
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Old 13th April 2007, 09:55 PM   #4
jeapel is offline jeapel  Canada
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other option are:

C4S CCS from bottlehead company

and cascode with DN2540 (i don t try)

but i prefer the sound of C4S over Gary
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Old 13th April 2007, 09:59 PM   #5
jeapel is offline jeapel  Canada
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i forget :-)

the good point for Gary ccs is the mu-follower output
for low zout and very good bandwidth to drive next
tube stage
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Old 13th April 2007, 10:23 PM   #6
Ryssen is offline Ryssen  Sweden
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I would use one with Leds instead of 1N4004.
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Old 13th April 2007, 10:41 PM   #7
forr is offline forr  France
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Hi Ryssen,
I got oscillations using the scheme with two LEDs in series. It was cured using a 1 kOhm resistor instead of Led1. I then discovered that Morgan Jones has done the same thing.
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Old 13th April 2007, 10:55 PM   #8
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Here is mine:

Click the image to open in full size.

You may use a P-channel FET instead of the upper transistor.
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Old 13th April 2007, 10:59 PM   #9
Ryssen is offline Ryssen  Sweden
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Quote:
I got oscillations using the scheme with two LEDs in series.
I didn´t Click the image to open in full size.
done several of them.Know meny people done this.How did you notice that?

Tried one with a zener diod but strange noise at high frekvensys,Leds sounden much cleaner..

Wavebourn:How do you calculate R2 and R3 in your schema?
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Old 13th April 2007, 11:04 PM   #10
Irakli is offline Irakli  United States
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Hi Guys,

Walter Jung just published I really nice article about CCSs in AudioXpress. I recommend everybody to take a look at it
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