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In Reply to: Tesla ECC-803S - Info?? posted by Catfish Man on November 08, 2002 at 12:11:17:
HI my friend.
I think that it's gonna be some old (new) stock from Czechoslovakia. As you know, Czechoslovakia doesn't exist any more, the state split in 1993 into Czech Republic and Slovak Republic.
If you Have a chance to get it for $low, buy it, don't hesitate these are good tubes.
Is't it ECC 83S, I haven't seen ECC 803, I don't know.
Follow Ups:
Hi BV,The number I was given was ECC803S. I have not seen the tubes in person.
Can you tell me what NOS tubes would be close to these Teslas?
Thanks very much for your help.
CM
Equivalent replacement is 12AX7, 7025.
Hi BV,So do you think these were produced in the mid-1990's and do you feel they are simular to the Telefunken?
CM
Unfortunately,I don't know Telefunken tubes. I don't think that Tesla ever made any copies of any electron tubes.
You bet they did.Actually the earlier, still yellow ink marked ECC803S are the best TFK frmae grid copies ever made. Today's offered ECC83S frame grids are nearly the same deal, but, for whatever reason, are not as punchy and detailed anymore.
/Dieter
BTW: Tesla made lotsa other "copies" of Western tubes, incl. Philip's EL51. After all, Philips tooled them...
Hi Dieter,How do these compare with the newer production tubes such as the Ei Elite 12AX7?
Thanks,
CM
Clearly a much better tube. More detailed and lower noise floor too. Tesla's also are remarkably consistent.Anyway, the manufacturing of frame grid tubes requires much tighter QA and attention to detail than with ordinary types.
/Dieter
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