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Re: Cascode....hmmmm...have you considered/tried [message #9554 is a reply to message #9553]

Wed, 15 February 2006 14:27

Damir
Messages: 1005
Registered: May 2009

Illuminati (2nd Degree)

Unfortunately, I don`t have any 6H30Pi, ECC99 and similar "candidates".
I tried BP Raytheon 5687WA and E182CC (Philips and Amperex) I have.
Just looking in a few sheets of papers, full of measured numbers. I tried three cascode variations, with many little tweaks. Full "report" soon.
"Slightly romantic" SE 300B sound can be ("wickedly") described also as warm/distorted, limited on both frequencies extremes, slow, soft, compressed...

Every change is "interactive", and IME - it isn`t easy to find the "right" sounding driver circuit.
And without FFT/THD and frequency plots I can only suspect that "strident" E182CC sound have something to do with odd upper harmonics, or "warm", "dark" and "mushy" 5687 sound with some other (lower) harmonics/IMD... And yes, good soundcard is expensive. Expecting some NOS sockets, and more E182CC, 5687 and 6C45Pi tubes these days.
And yes, CCS can sound a little "dry"... this afternoon I tried CCS loaded 6J5GT driver, sound not bad, but (of course), A only 21.
P.S. I used AZ50 rectifier tube, my choice between all 5R4GYB, 5V4G/GZ32 and GZ34 tubes I tried...

"Besides, we WOULD drive ourselves crazy with FFT plots and THD values...LOL!"
Don`t tell anybody, but I don`t need that papers with numbers...nor I used schematics...it`s everything in my head...and not much of anything else...

http://www.youtube.com/watch?v=h1HGPpZ8-8Q

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[Message index]

		The Yokes on me By: Manualblock on Fri, 10 February 2006 19:04
		Re: The Yokes on me By: Damir on Fri, 10 February 2006 23:51
		Re: The Yokes on me By: Manualblock on Sat, 11 February 2006 09:10
		Re: The Yokes on me By: Damir on Sat, 11 February 2006 10:15
		Re: The Yokes on me By: Manualblock on Sat, 11 February 2006 12:08
		Re: The Yokes on me By: Damir on Sat, 11 February 2006 12:57
		Re: The Yokes on me By: Manualblock on Sun, 12 February 2006 06:47
		Re: The Yokes on me By: Damir on Sun, 12 February 2006 10:32
		What size is the coupling cap? By: Old Brown Eyes on Mon, 13 February 2006 13:13
		Coupling cap/grid choke, etc. By: Damir on Tue, 14 February 2006 06:51
		Cool, I'll let you know how mine turns out By: Old Brown Eyes on Tue, 14 February 2006 07:56
		Re: Cool, I'll let you know how mine turns out By: Damir on Tue, 14 February 2006 12:08
		Cascode....hmmmm...have you considered/tried By: Old Brown Eyes on Wed, 15 February 2006 08:28
		Re: Cascode....hmmmm...have you considered/tried By: Damir on Wed, 15 February 2006 14:27
		0,47µ/4µ7 By: Damir on Thu, 16 February 2006 06:43
		Re: 0,47µ/4µ7 By: Manualblock on Thu, 16 February 2006 09:00
		Re: 0,47µ/4µ7 By: Damir on Thu, 16 February 2006 12:16
		Re: 0,47µ/4µ7 By: Manualblock on Thu, 16 February 2006 14:35

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