OTL Asylum

Clipping, how could we possibly define clipping for OTL?

77.43.10.3

In Reply to: RE: I have to think it over posted by tubetvr on November 01, 2009 at 00:59:59

This is my point of view on the matter.
Clipping definition of OTL tube amplifiers depends on tubes performance, that is, how much current the tubes can deliver into the load.
Tube performance depends on tube manufacturer, year of manufacturing, tube ageing and the like.
In my experience Sylvania 6080 or Russian 6AS7 tubes are the best, as they can deliver (for a short time) more than 500 mA peak (as a matter of fact if I intentionally overdrive my OTL with four 6080 per channel the HT 2A retarded fuses blow).
But in order to maximize the life of OTL tubes is better to keep a reasonable safety margin.
For 6AS7/6080, whoever is the manufacturer or their ultimate performance, I think that they should never deliver more than 400 mA peak per triode.
This would put a practical 'soft clipping' definition at 400 mA /tube and 'hard clipping definition' at 500 mA / tube.

A final sad remark: unfortunately I do not think this approach will ever help to build better tube amplifiers.

Best Regards
Luca Cellai

ecc230

Follow Ups:

RE: Clipping, how could we possibly define clipping for OTL? - Tre' 20:58:00 11/11/09 (0)

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