Whoah, thats really interesting! I have about 20 tubes with no triangle, 5 with triangle but with no number in it and 2 that have another number instead of the triangle! Guess im lucky? Here is a picture: http://farm8.staticflickr.com/7043/6883047229_891b1d8cbe_b.jpg
On Feb 15, 8:44 pm, "Dieter Waechter" <i...@nocrotec.com> wrote: > The triangle is a very very important sign for Nixie tube collectors. > in short: > No trinangle: pilot lot (rare tube) > "1" in triangle: quality category 1 (best quality) > "2" in triangle: quality category 2 (low quality) > "=" in triangle: bad tolerances (only for no-name products ect.) > "S" in triangle: special release > > There are some more interesting signs - I will explain later in a special > article in cooperation with Jens. > Dieter > > > > > > > > ----- Original Message ----- > From: "kay486" <luckyl...@gmail.com> > To: "neonixie-l" <neonixie-l@googlegroups.com> > Sent: Wednesday, February 15, 2012 7:28 PM > Subject: [neonixie-l] Re: two versions of Z566M ? > > btw, do you know why some of the Z566M tubes has the yellow triangle > with round corners stamped at back? Does it mean something or its just > sign of earlier/later series? -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
