LM4702 meets up with 6550's

[jackinnj]

In the January issue of AudioXpress Bill Christie shows how to use National's LM4702 to drive a pair of 6550's.

 

[kevinkr]

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..

 

[astouffer]

Quite a bit with +/- 100 volt rails

http://www.national.com/pf/LM/LM4702.html

 

[kevinkr]

Quite a bit with +/- 100 volt rails

http://www.national.com/pf/LM/LM4702.html

Yeah that would provide quite a bit of margin..

 

[smoking-amp]

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.

Don