19-09-2017, 06:32 PM
(This post was last modified: 19-09-2017, 06:40 PM by Murphyv310.)
Hi.
These two pictures are from this morning before I went out.
The CRT is running 4.5KV from a tripler and is displaying the German 180 line system (180/25P)
Results are better than I'd have expected, for such a long persistence tube the flicker is noticeable, with low EHT around 2Kv its not seen.
Still a lot to do but, I'm sure the project will work.
The cobbled in LOPT will be useless as scan transformer, it oddly seems fine on low frequency scanning, it's best on 180 lines. I think I will construct a blocking oscillator for line generation and perhaps use another Thorn jellypot, then add separate EHT. The 7BP7 is certainly bright and half an hour fiddling with the focus magnet has massively improved things since I took the photos.
