SS CCS and distortion

Joshua_G · 2nd June 2010, 05:55 PM

A person I know with many years experience of designing and building tube amps told me that Solid State CCS, especially in the anode circuit, add high order harmonic distortion.

Does anybody have measurements results for SS CCS?

Globulator · 2nd June 2010, 06:13 PM

The real man's way of implementing a CCS is a huge B+ and a giant resistor, personally I'm not so much into adding silicon when a few tubes can do the job instead.

I'm still waiting for a nice pentode or double triode CCS implementation however, although I'm sure there must be one

SY · 2nd June 2010, 06:21 PM

Quote:

Originally Posted by Joshua_G

Does anybody have measurements results for SS CCS?

I've posted many here; a little searching will turn some up. Bottom line: your friend is full of it.

Check "guess the tube" thread for starters.

Joshua_G · 2nd June 2010, 06:23 PM

Quote:

Originally Posted by Globulator

I'm still waiting for a nice pentode or double triode CCS implementation however, although I'm sure there must be one

You van find some nice implementations on Allen Wright's website.

el156 · 2nd June 2010, 06:36 PM

Quote:

Originally Posted by Joshua_G

You van find some nice implementations on Allen Wright's website.

Hi Joshua!
It is a pitty you dont go ahead with your El156 project! Any particular reason? Costs? Power? You said to like the sound of el156 very much!
I am going on with mine,but only to finish next year,at the moment i am working with another one (EL34 PP).
Silvino

Irakli · 2nd June 2010, 06:44 PM

I agree with SY. One caveat is that the quality of CCS matters too.

Joshua_G · 2nd June 2010, 06:48 PM

Quote:

Originally Posted by SY

I've posted many here; a little searching will turn some up. Bottom line: your friend is full of it.

Check "guess the tube" thread for starters.

On "Guess that tube" thread you related to 12AX7 with very light load. How about tubes in real circuits? No added high order harmonics by SS CCS?

Joshua_G · 2nd June 2010, 06:49 PM

Quote:

Originally Posted by el156

Hi Joshua!
It is a pitty you dont go ahead with your El156 project! Any particular reason? Costs? Power? You said to like the sound of el156 very much!
I am going on with mine,but only to finish next year,at the moment i am working with another one (EL34 PP).
Silvino

The reason is cost.

Joshua_G · 2nd June 2010, 06:50 PM

Quote:

Originally Posted by Irakli

I agree with SY. One caveat is that the quality of CCS matters too.

Can you please elaborate on the quality of CCS?

Irakli · 2nd June 2010, 07:02 PM

Quote:

Originally Posted by Joshua_G

Can you please elaborate on the quality of CCS?

For example, a JFET or Depletion MOSFET with gate connected with source and with (or without) source resistor is not the best CCS one might design. It might be enough for some applications. The key is what the requirements are.

2nd June 2010, 05:55 PM	#1
Joshua_G diyAudio Member Join Date: Nov 2008 Location: Israel	SS CCS and distortion A person I know with many years experience of designing and building tube amps told me that Solid State CCS, especially in the anode circuit, add high order harmonic distortion. Does anybody have measurements results for SS CCS?

2nd June 2010, 06:44 PM	#6
Irakli diyAudio Member Join Date: Aug 2004 Location: washington, DC Blog Entries: 1	I agree with SY. One caveat is that the quality of CCS matters too. __________________ My System

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2nd June 2010, 06:13 PM	#2
Globulator diyAudio Member Join Date: Aug 2004 Location: Cambridge, England.	The real man's way of implementing a CCS is a huge B+ and a giant resistor, personally I'm not so much into adding silicon when a few tubes can do the job instead. I'm still waiting for a nice pentode or double triode CCS implementation however, although I'm sure there must be one

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