<https://lh5.googleusercontent.com/-bBKS-KcSzyo/UEeSImQ3w2I/AAAAAAAAABM/RC1qFuR9VDY/s1600/05092012272.jpg>
<https://lh5.googleusercontent.com/-LuZ_6U4NvDI/UEeSRLSZntI/AAAAAAAAABU/Te3HtRTp2uM/s1600/05092012270.jpg> <https://lh6.googleusercontent.com/-DD9pSLuOZ08/UEeR_EQCR3I/AAAAAAAAABE/e7c35AB6gmU/s1600/05092012269.jpg> Hi there, i have just bought few new in box Z560M tubes, and i was quite surprised when i found one completely coated tube. I havent seen any Z560M by RTF that would have been completely coated, only those that are coated on top. The coating is much lighter, and the cathodes are little bit thiner, and one interesting thing, it has the *4* cathode bigger wider than the rest of the numbers, i never seen it on RTF tube before ( ZM1020 by Tesla have that too, and many more tubes im sure). Ive also noticed that the envelope is more sperical than the other tubes. There is also one (the only one i have) Z5600M i have from before, for comparison, it seems to have the same envelope, but the numbers are thick as with the common versions of Z560M, and it has the normal *4*. Other thing i found was that both Z5600M and the fully coated Z560M dont have the round getter anywhere inside them. But why im posting all this, *im not able to light up the fully coated Z560M * (and yet the half coated tubes work fine, so does the Z5600M). I cant see any crack in the envelope whatsoever, nor any signs of burned wires inside. The tube looks 100% fine, i just cant light it up! I havent tried to run it on higher voltage than 180V though. Does anybody know what could be the problem? The only thing i though of was some long time outgasing due to the lack of the getter, but i dont think thats the problem since the Z5600M works just fine without it. Any information about the tube would be highly appreciated. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/MsR4zFfMQNcJ. For more options, visit https://groups.google.com/groups/opt_out.
