Ultimate Amplifier

DF Plummer · 17th November 2007, 07:41 AM

Hi there!

Has anyone ever built the Emory Cook/Gus Jose "Ultimate Amp" partly described in the attached? Is there any reason to build it now?

I have the rest of the article, the parts list and the schematic if anyone is interested.

CharleyW · 17th November 2007, 09:40 AM

Lacking a magnifying glass ...

I suspect you would get more replies if the attachment was readable.

soundbrigade · 17th November 2007, 10:15 AM

SHOOOT!

DF Plummer · 17th November 2007, 10:18 PM

Hi there!

Oooopppsss! I chose the wrong file; hopefully, here's a readable version:

fierce_freak · 17th November 2007, 10:45 PM

Seems interesting, but I'm usually wary of negative feedback.

7N7 · 17th November 2007, 10:51 PM

I would be quite interested to see the final circuit diagram and indeed the arguments for it.

Meanwhile, reading the first two paragraphs, the temptation to add (get on with it - ED) was almost overwhelming.

Bit of a waffler eh?

"But now, pilot lights in the eyes of circuit-designers ..."

Oh dear!

7N7

ray_moth · 18th November 2007, 12:01 AM

Never take advice from someone who thinks 'comprised of' is English!

I think the author is getting around to describing (eventually) how to add some current NFB to an amp that uses voltage NFB, to improve damping factor. In fact, a number of commercial amps did just that and they usually made the 'damping factor control' adjustable, to suit the speaker in use. Maybe the speakers of the day needed it, I don't know, but the idea seems to have been discontinued decades ago.

454Casull · 18th November 2007, 12:47 AM

What's not English about "comprised of"?

7N7 · 18th November 2007, 12:55 AM

Quote:

Originally posted by 454Casull
What's not English about "comprised of"?

"Comprising" or according to context, "Comprised" is enough; the "of" is superfluous - indeed tautological!

7N7

Andrewbee · 18th November 2007, 01:46 AM

quote:
"Comprising" or according to context, "Comprised" is enough; the "of" is superfluous - indeed tautological!

Somewhat akin to "foot pedal". English is indeed a strange language, even for the the native speaker. Imagine learning it as a second or third language.

Andrew

17th November 2007, 10:15 AM	#3
soundbrigade diyAudio Member Join Date: Feb 2006 Location: Vaenersborg, Sweden	SHOOOT! __________________ /Magnus

17th November 2007, 10:51 PM	#6
7N7 diyAudio Member Join Date: Jan 2003 Location: "La France Profonde"	I would be quite interested to see the final circuit diagram and indeed the arguments for it. Meanwhile, reading the first two paragraphs, the temptation to add (get on with it - ED) was almost overwhelming. Bit of a waffler eh? "But now, pilot lights in the eyes of circuit-designers ..." Oh dear! 7N7 __________________ Plug them in and light them up

18th November 2007, 01:46 AM	#10
Andrewbee diyAudio Member Join Date: Apr 2002 Location: Cayman Islands	quote: "Comprising" or according to context, "Comprised" is enough; the "of" is superfluous - indeed tautological! Somewhat akin to "foot pedal". English is indeed a strange language, even for the the native speaker. Imagine learning it as a second or third language. Andrew __________________ None of us are leaving this world alive. Enjoy it responsibly as you may.

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17th November 2007, 09:40 AM	#2
CharleyW diyAudio Member Join Date: Aug 2002 Location: Arlington, TX	Lacking a magnifying glass ... I suspect you would get more replies if the attachment was readable.

17th November 2007, 10:45 PM	#5
fierce_freak diyAudio Member Join Date: Jul 2007	Seems interesting, but I'm usually wary of negative feedback.

18th November 2007, 12:01 AM	#7
ray_moth diyAudio Moderator Emeritus Join Date: Jan 2004 Location: Jakarta	Never take advice from someone who thinks 'comprised of' is English! I think the author is getting around to describing (eventually) how to add some current NFB to an amp that uses voltage NFB, to improve damping factor. In fact, a number of commercial amps did just that and they usually made the 'damping factor control' adjustable, to suit the speaker in use. Maybe the speakers of the day needed it, I don't know, but the idea seems to have been discontinued decades ago.

18th November 2007, 12:47 AM	#8
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	What's not English about "comprised of"?

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