On Sunday, June 21, 2015 at 1:57:48 PM UTC-4, Dman777 wrote: > > What is the difference between the IVLM1-1/7 and IV-26 tubes type 1 tubes? > They look the same but the IVLM1-1/7 are more expensive. >
The IV-26 are longer (112mm base to nipple) than the IVLM1-1/7 (78mm). The 26 has slightly oval dots (actually clipped circles) on a clear substrate while the 1/7 has true round dots on a white substrate. Both seem to have been manufactured by ORZEP (Orel). There are some overlapping date codes, but the earliest date I've seen is on a 1/7 and the latest date is on a 26. All of the 1/7 dates I've encountered have been the older Roman numeral month form (IX-83), while 26's have been dated both that way and the newer 8903 YYMM style. The brightness curve on 26's is pretty bad - they don't hit full brightness for a few hundred hours (before that they're oddly streaky and uneven) and they start fading noticeably after some thousands of hours. I'm not sure about the 1/7, as I've never powered one on for long enough to tell. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/484fd1bf-6dd8-41e2-8971-203d78ad4f99%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
