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Old 17th November 2007, 06:41 AM   #1
DF Plummer is offline DF Plummer  United States
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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.
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File Type: jpg ultimate amp-1.jpg (99.5 KB, 1544 views)
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Old 17th November 2007, 08:40 AM   #2
CharleyW is offline CharleyW
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Lacking a magnifying glass ...

I suspect you would get more replies if the attachment was readable.
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Old 17th November 2007, 09:15 AM   #3
soundbrigade is offline soundbrigade  Sweden
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Old 17th November 2007, 09:18 PM   #4
DF Plummer is offline DF Plummer  United States
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Default (Hopefully) Larger Image

Hi there!

Oooopppsss! I chose the wrong file; hopefully, here's a readable version:
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File Type: pdf control schematic121.pdf (97.5 KB, 654 views)
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Old 17th November 2007, 09:45 PM   #5
fierce_freak is offline fierce_freak  United States
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Seems interesting, but I'm usually wary of negative feedback.
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Old 17th November 2007, 09:51 PM   #6
7N7 is offline 7N7  United Kingdom
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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!

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Old 17th November 2007, 11:01 PM   #7
ray_moth is offline ray_moth  Indonesia
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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.
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Old 17th November 2007, 11:47 PM   #8
454Casull is offline 454Casull  Canada
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What's not English about "comprised of"?
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Old 17th November 2007, 11:55 PM   #9
7N7 is offline 7N7  United Kingdom
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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!

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Old 18th November 2007, 12:46 AM   #10
Andrewbee is offline Andrewbee  Jamaica
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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

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