William T Chater power amp

lumanauw · 14th June 2006, 01:59 AM

Has anyone have a chance to heard a "40W all-mosfet power amp" designed by William T Chater? The article appears in Audio Amateur, and from searching in Google, seems not many words about this amp, but the remaining few contains words like "highly recomended"

How does this amp sounds? It is interesting because the design is not simple, and many servo's in 1 amp.

RetroAudio · 14th June 2006, 02:26 AM

it's a rather involved circuit with a high parts count. Probably so much so for most amp builders.

tiefbassuebertr · 5th May 2011, 07:39 PM

Quote:

Originally Posted by lumanauw

Has anyone have a chance to heard a "40W all-mosfet power amp" designed by William T Chater? The article appears in Audio Amateur, and from searching in Google, seems not many words about this amp, but the remaining few contains words like "highly recomended"

How does this amp sounds? It is interesting because the design is not simple, and many servo's in 1 amp.

Here the patent from this author
Bias control for power amplifiers
in this case also this thread could be of interest:
Only N-Channel MOSFETs (NMOS); better Audio from non complements by Audio Power?
I want to know brands with such an amplifier as commercial home audio product. Who knows more?

sandyhooker · 5th May 2011, 08:00 PM

I built this amp on PCB's from TAA. Had problems which were set straight with the Author's help. He was very willing to help with problems. I dont remember much about the performance which probably means it was'nt that special.VERY high parts count and as I recall there were iron beads to prevent oscillation. I doubt anyone would build it today considering what is now available in DIY Amp field. Odd but my recollection was '25 watts' out.

tiefbassuebertr · 08:47 PM

Quote:

Originally Posted by sandyhooker

I built this amp on PCB's from TAA. Had problems which were set straight with the Author's help. He was very willing to help with problems. I dont remember much about the performance which probably means it was'nt that special.VERY high parts count and as I recall there were iron beads to prevent oscillation. I doubt anyone would build it today considering what is now available in DIY Amp field. Odd but my recollection was '25 watts' out.

Interesting. Was it shortly after the publication of this magazine?
How old was Mr. William T Chater in those days?
If Mr. Chater is still working in electronics, he knows certainly any commercial brands, where this topology is inside.
Thanks for advices.
By post #40 about
Only N-Channel MOSFETs (NMOS); better Audio from non complements by Audio Power?
you will find a pic of cover from this magazine

sandyhooker · 5th May 2011, 08:48 PM

I believe He was retired when the article was published. He lived in S Calif near Carlesbad (Rancho Santa Fe ??). Somewhere I may have one of his letters (there was'nt EMAIL) which I recall to have been rather warm and very informative. Sorry I cant answer more.

14th June 2006, 01:59 AM	#1
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	William T Chater power amp Has anyone have a chance to heard a "40W all-mosfet power amp" designed by William T Chater? The article appears in Audio Amateur, and from searching in Google, seems not many words about this amp, but the remaining few contains words like "highly recomended" How does this amp sounds? It is interesting because the design is not simple, and many servo's in 1 amp.

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14th June 2006, 02:26 AM	#2
RetroAudio diyAudio Member Join Date: Mar 2004 Location: Everett, WA	it's a rather involved circuit with a high parts count. Probably so much so for most amp builders.

5th May 2011, 08:00 PM	#4
sandyhooker diyAudio Member Join Date: Dec 2005 Location: Arizona	I built this amp on PCB's from TAA. Had problems which were set straight with the Author's help. He was very willing to help with problems. I dont remember much about the performance which probably means it was'nt that special.VERY high parts count and as I recall there were iron beads to prevent oscillation. I doubt anyone would build it today considering what is now available in DIY Amp field. Odd but my recollection was '25 watts' out.

5th May 2011, 08:48 PM	#6
sandyhooker diyAudio Member Join Date: Dec 2005 Location: Arizona	I believe He was retired when the article was published. He lived in S Calif near Carlesbad (Rancho Santa Fe ??). Somewhere I may have one of his letters (there was'nt EMAIL) which I recall to have been rather warm and very informative. Sorry I cant answer more.

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