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68.46.2.82
In Reply to: Re: 6SN7 currently HiFi market oriented posted by Frihed89 on April 25, 2007 at 05:47:23:
May I remind you good sir, Mr. Frihed, that VT-231 is invariably a moniker given to 6SN7s by the military. They are generally speaking not different than the same civilian brand of that period. For a very good essay on this see Tubesellers link quoting our own tube asylum.
The truly ruggedized tubes are designated with a "W" and as in JAN CHS 6SN7WGT later versions had designations like WGTA etc. I am sure Len could shed some light on all this.
It does appear truly insane that such a well liked tube has so few current production choices. Can you imagine, the migration by manufacturers and consumers to a new production clone of a true round plate 6SN7 that sounded decent.
IMHO the Sino and EH tubes lack the fuller sound and richer tone of the most readibly available inexpensive old production 6SN7s.
Follow Ups:
Why don't you and I quit our day jobs, round up a couple million and start making these babies!
Why can't somebody make 6SN7s like they did in the early 1940s?And no one here has really got a good answer.
I am sure it's got something to do with economics, but what is it about the 6SN7 of that era that makes people NOT produce good copies?
Honestly when I see the same rare tubes come to market in bunches it is then that I suspect counterfiets or a stash was found and sold I am not expert enough to say. Some are simply too much of a pain in the a** to trouble with imitating. Rebranding is quicker and easier but the pros seem to catch them. With 6SN7s so many, as the late Carl Sagen would say, "billions and billions", were made, that there really isn't a pressing demand on the tube making industry to retool. Nor to make them well and have custom alloys or to try and reverse engineer the skills needed to justify the expense. It must have been some wierd press that welded round plates, possibly by a guy doing one plate at a time all day.
To Tom waits the investment may be only "small change". Whilst a fellow named Floyd says its "Money Money".
If I were to model this mathematically it would be a non linear algebraic proof ending up with an entropic fractal. But I'll leave that for you to figure out.
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