anyone got a hafler 9505 schematic?

lt cdr data · 10th April 2004, 06:58 PM

thanks

djk · 10th April 2004, 10:15 PM

http://hafler.com/techsupport/pdf/MAN0587E_9505_man.pdf

slowhands · 11th April 2004, 12:05 AM

The schematic page shows blank. Is this a software/browser issue, or is Hafler being coy?

djk · 11th April 2004, 05:34 AM

Got a new computer and OS on Friday, can't say for sure.

Everything looks different, no bookmarks.

Elso Kwak · 11th April 2004, 06:57 AM

Quote:

Originally posted by slowhands
The schematic page shows blank. Is this a software/browser issue, or is Hafler being coy?

The schematic is blanked out on page 8 and 9 of the manual. Too bad.

lt cdr data · 11th April 2004, 09:25 AM

I suspect its Hafler, I tried that.

Odd that they make the schematics available, then blank them out...

Why do the 'pro' firms print the schematics, yet the commercial hifi firms don't let you see them at all?

Credit to the pros. good for them.

Its not as though in a lot of cases the commercial ones are their own designs and in electronics, very little is new, I think its hypocritical.

pmkap · 11th April 2004, 05:26 PM

Dunno how close this is to the schematic you're looking for, its the 9300/9500 schematic...
http://k-amps.8m.com/cgi-bin/i/Power...afler_915c.jpg

slowhands · 11th April 2004, 05:54 PM

Quote:

Originally posted by lt cdr data
I suspect its Hafler, I tried that.

Odd that they make the schematics available, then blank them out...

Why do the 'pro' firms print the schematics, yet the commercial hifi firms don't let you see them at all?

Credit to the pros. good for them.

Its not as though in a lot of cases the commercial ones are their own designs and in electronics, very little is new, I think its hypocritical.

It is a currently shipping product. Perhaps they don't want to let their competition know exactly how to reverse-engineer their product. Many of the earlier schematics seem to be posted.

lt cdr data · 11th April 2004, 08:00 PM

its a fair point, sugden used to do that, and I think its a reasonable compromise, but even so, if the circtuit is in the users manual, someone who wanted to reverse engineer it, could easily do it, especially a competitor with funds for that.

djk · 11th April 2004, 08:35 PM

"Dunno how close this is to the schematic you're looking for, its the 9300/9500 schematic..."

That sure looks the same. Grounded output stage, j-fet dual comp diff inputs. A Jim Strickland design for sure.

http://patft.uspto.gov/netacgi/nph-P...=IN/strickland

10th April 2004, 06:58 PM	#1
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	anyone got a hafler 9505 schematic? thanks

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10th April 2004, 10:15 PM	#2
djk diyAudio Member Join Date: Feb 2001 Location: USA	http://hafler.com/techsupport/pdf/MAN0587E_9505_man.pdf

11th April 2004, 12:05 AM	#3
slowhands diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	The schematic page shows blank. Is this a software/browser issue, or is Hafler being coy?

11th April 2004, 05:34 AM	#4
djk diyAudio Member Join Date: Feb 2001 Location: USA	Got a new computer and OS on Friday, can't say for sure. Everything looks different, no bookmarks.

11th April 2004, 09:25 AM	#6
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	I suspect its Hafler, I tried that. Odd that they make the schematics available, then blank them out... Why do the 'pro' firms print the schematics, yet the commercial hifi firms don't let you see them at all? Credit to the pros. good for them. Its not as though in a lot of cases the commercial ones are their own designs and in electronics, very little is new, I think its hypocritical.

11th April 2004, 05:26 PM	#7
pmkap diyAudio Member Join Date: Aug 2001 Location: NYC	Dunno how close this is to the schematic you're looking for, its the 9300/9500 schematic... http://k-amps.8m.com/cgi-bin/i/Power...afler_915c.jpg

11th April 2004, 08:00 PM	#9
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	its a fair point, sugden used to do that, and I think its a reasonable compromise, but even so, if the circtuit is in the users manual, someone who wanted to reverse engineer it, could easily do it, especially a competitor with funds for that.

11th April 2004, 08:35 PM	#10
djk diyAudio Member Join Date: Feb 2001 Location: USA	"Dunno how close this is to the schematic you're looking for, its the 9300/9500 schematic..." That sure looks the same. Grounded output stage, j-fet dual comp diff inputs. A Jim Strickland design for sure. http://patft.uspto.gov/netacgi/nph-P...=IN/strickland

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