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Old 20th December 2003, 05:05 PM   #11
diyAudio Member
Join Date: Mar 2002
Location: Canada
Default Probably not oscillating

If you have used the stacked BUF634 in high bandwidth mode they are going to throw out a lot of heat even when not driven. Three stacked ones in high bandwidth mode will run 45 mA undriven. See p. 5 of the info sheet.

There's no functional need to run in full bandwidth mode. A 300 ohm resistor for each BUF634 will give you 3 x 7mA and still good bandwidth. Norman
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Old 20th December 2003, 07:24 PM   #12
Join Date: Feb 2002
Location: As far from the NOSsers as possible
Default What's wrong with this picture....

"Passive Buffered"? How the hell did you determine that? It is either one or the other.

Stacked buffers?.....physically?......yep....Phred has it right.

If you can't drive your application with only one of these, you are in for problems.

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Old 22nd December 2003, 07:34 AM   #13
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Join Date: Oct 2001
Location: Sweden
Send a message via MSN to Flemming J P
>"Passive Buffered"? How the hell did you determine that? It is either one or the other.

I didn't come up with that name. It is a copy of http://www.stereophile.com/amplificationreviews/54/

I skiped one buf634, so I could fit input and putput resistors to the 2 that was left.

The guys at headwize stacks buffers, ok they drive headphones and not amps, but I thought why not try when I have them around anyway.
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Old 22nd December 2003, 04:42 PM   #14
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JP.......send me an e-mail, if you get the chance.

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