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Old 11th December 2007, 02:48 PM   #1
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Default LM4702 meets up with 6550's

In the January issue of AudioXpress Bill Christie shows how to use National's LM4702 to drive a pair of 6550's.
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Old 11th December 2007, 04:51 PM   #2
kevinkr is offline kevinkr  United States
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Default Re: LM4702 meets up with 6550's

Quote:
Originally posted by jackinnj
In the January issue of AudioXpress Bill Christie shows how to use National's LM4702 to drive a pair of 6550's.
Hi Jackinnj,
I just read that article and thought how clever, but then wondered why..

I also of course wondered how much voltage headroom is available in that driver design..


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Old 11th December 2007, 05:30 PM   #3
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Quite a bit with +/- 100 volt rails

http://www.national.com/pf/LM/LM4702.html
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Old 11th December 2007, 05:55 PM   #4
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Quote:
Originally posted by astouffer
Quite a bit with +/- 100 volt rails

http://www.national.com/pf/LM/LM4702.html
Yeah that would provide quite a bit of margin..
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Old 17th December 2007, 12:04 AM   #5
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Should make a nice low distortion differential test signal generator (driven by a sound card) for testing P-P output tube stages and differential driver tube stages. I just got some LME49810 chip samples in, good for 60 mA drive instead of the 10 ma for the LM4702.

a bit OT: I would like to see an amp using one of these driver chips with Thermal Trak outputs and also a Vbe generator with Hawksford Error Correction implemented.

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