Nice! First CCS.

Brit01 · 20th December 2009, 11:40 AM

Have never used a CCS before despite members swearing by them.

Hooked up a CCS on the anode of one of my simple common cathode linestages.

Using a SV83 as the CCS. OK maybe inefficient but not worried about that. Getting a nice stable 190V from the CCS.

Very nice indeed.
Bass amongst other things significantly improved.
Never had much success using 6N1P's but now it really shines with the CCS on the plate.

Also replaced the cathode resistor/cap bypass with some yellow leds. Got a perfect 1.85V on both cathodes.

SY · 20th December 2009, 11:52 AM

There's a great synergy between CCS and LED bias, too. Welcome to the Dark Side.

Geek · 20th December 2009, 12:32 PM

Congrats!

Try a CCS on some "worthless tee vee toobs" as well and you'll hear the magic genie come out of the bottle

Cheers!

Brit01 · 20th December 2009, 12:49 PM

Thxs SY/Geek.

Trying a variety of music and really liking this.

I had an issue with humming before thinking the transformer was damaged, but it seems to have cleared up using the CCS. Strange.

Now to try with some different tubes

But the lady of the house wants to go out

Well an excuse to enjoy my classic alfa romeo and hear those sweet weber carbs singing.

SY · 20th December 2009, 01:08 PM

Using a CCS will dramatically improve the power supply rejection, so that may be why you have less hum.

Brit01 · 20th December 2009, 02:31 PM

QQ

mu stage

Looking at this article above I see he takes the output of the gain stage between the cathode of the CCS penthode and RK2 (V2's cathode resistor) at the point where the cap is.

I am taking it off from the point below the cathode resistor.

What difference would this make?

So far I'm getting good results. (took the CCS design from Pete Millets low mu amp).

Gluca · 20th December 2009, 06:55 PM

It depends on what you are driving. BTW I did always prefer the plate output. Give solid state CCS a try, you will never come back.

Gianluca

Brit01 · 20th December 2009, 07:17 PM

So I'm assuming we take the output from the plate or above the cathode resistor depending on how hard it is to drive?

dhaen · 20th December 2009, 10:09 PM

I think the cathode point has a much lower impedance, so is preferable.
My amp OnRyoku 845SE does this.

Brit01 · 27th December 2009, 06:12 PM

tweeked design:

my best sounding amp to date.

Correction. R5 is 910 ohms Holco.

20th December 2009, 11:40 AM	#1
Brit01 diyAudio Member Join Date: Jul 2008	Nice! First CCS. Have never used a CCS before despite members swearing by them. Hooked up a CCS on the anode of one of my simple common cathode linestages. Using a SV83 as the CCS. OK maybe inefficient but not worried about that. Getting a nice stable 190V from the CCS. Very nice indeed. Bass amongst other things significantly improved. Never had much success using 6N1P's but now it really shines with the CCS on the plate. Also replaced the cathode resistor/cap bypass with some yellow leds. Got a perfect 1.85V on both cathodes.

20th December 2009, 11:52 AM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	There's a great synergy between CCS and LED bias, too. Welcome to the Dark Side. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

20th December 2009, 01:08 PM	#5
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Using a CCS will dramatically improve the power supply rejection, so that may be why you have less hum. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

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20th December 2009, 12:32 PM	#3
Geek diyAudio Member Join Date: Sep 2004	Congrats! Try a CCS on some "worthless tee vee toobs" as well and you'll hear the magic genie come out of the bottle Cheers!

20th December 2009, 12:49 PM	#4
Brit01 diyAudio Member Join Date: Jul 2008	Thxs SY/Geek. Trying a variety of music and really liking this. I had an issue with humming before thinking the transformer was damaged, but it seems to have cleared up using the CCS. Strange. Now to try with some different tubes But the lady of the house wants to go out Well an excuse to enjoy my classic alfa romeo and hear those sweet weber carbs singing.

20th December 2009, 02:31 PM	#6
Brit01 diyAudio Member Join Date: Jul 2008	QQ mu stage Looking at this article above I see he takes the output of the gain stage between the cathode of the CCS penthode and RK2 (V2's cathode resistor) at the point where the cap is. I am taking it off from the point below the cathode resistor. What difference would this make? So far I'm getting good results. (took the CCS design from Pete Millets low mu amp).

20th December 2009, 06:55 PM	#7
Gluca tarmac ripper diyAudio Member Join Date: Nov 2004 Location: Back to Italy	It depends on what you are driving. BTW I did always prefer the plate output. Give solid state CCS a try, you will never come back. Gianluca

20th December 2009, 07:17 PM	#8
Brit01 diyAudio Member Join Date: Jul 2008	So I'm assuming we take the output from the plate or above the cathode resistor depending on how hard it is to drive?

20th December 2009, 10:09 PM	#9
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	I think the cathode point has a much lower impedance, so is preferable. My amp OnRyoku 845SE does this.

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