Hello. Is the filament glowing visibly after one minute of power on?
Is the filament fuse still good? Can you confirm current flows there? If all above check positive, in dark room do you see the green shade of the beam out of the screen? My kit draws less than 2A, I am quite sure. 650 mA go to the filament (1A before conversion?!), the rest for HV. Is there any component getting hot? I reversed a voltage regulator... Paolo Il Mer 19 Mag 2021, 23:31 John Snow <jroperk...@gmail.com> ha scritto: > Tried it with a 12V 3A and 12V 4A power supply, can't get either 8SJ31J > tube I have to light up from turning R21 Intensity. > > Both power board orange bulb and control's red led light up though, > > I've ordered a 12V 5A power supply hoping that'll sort it. > On Wednesday, 19 May 2021 at 21:31:08 UTC+1 John Snow wrote: > >> Forwarded the documentation on, rotary control board turned up, I'm on to >> calibration >> >> On Wednesday, 19 May 2021 at 20:01:19 UTC+1 gregebert wrote: >> >>> My kit arrived today WITHOUT instructions. Damn! If anyone has an >>> electronic copy, please let me know. I'm contacting the seller. Nothing I >>> could find on their website. But at least I dont have to worry about the >>> CRT connections because they prewired it for me. >>> >>> On Tuesday, May 18, 2021 at 7:59:23 PM UTC-7 John Snow wrote: >>> >>>> Assembled all of it & somehow managed to misplace the rotary control >>>> board. >>>> >>>> They've made a few near-substitutions in the parts list, notably the >>>> XYZ board part #46 - 1 piece 510K is now a 1M resistor, this was the last >>>> one I soldered, presuming uprated intentionally. >>>> >>>> There's a few more with non-standard banding, but multimeter confirmed >>>> values. >>>> >>>> Also the Control board has downrated the capacitance of #6 from 330pF >>>> to 300pF and of parts #9 - now 10V instead of 16V rating, presumably >>>> availability. >>>> >>>> The fuses are 1A and 2A fast-acting fuses, annoyingly must be >>>> desoldered after they've blown, unsure of the voltage tolerance. >>>> >>>> Hoping the control board turns up, otherwise I have a paperweight I >>>> can't tune. >>>> >>>> On Tuesday, 18 May 2021 at 18:29:09 UTC+1 Pruttel wrote: >>>> >>>>> Replying to myself: since I couldn't attach, I've put two photos >>>>> online: https://possob.xs4all.nl/sylvania/ >>>>> >>>>> Any help is appreciated! >>>>> >>>>> Iwan >>>>> >>>>> On Tuesday, May 18, 2021 at 7:14:56 PM UTC+2 Pruttel wrote: >>>>> >>>>>> Since this is a CRT topic, I thought I'd ask it here: I got a >>>>>> rectangular Sylvania CRT at a HAM flea market quite some time ago, but I >>>>>> cannot find any info on it. I wanted to attach a photo of the tube + >>>>>> label, >>>>>> but the google website won't let me? The type is SC3015P1B, serial >>>>>> 2391113. >>>>>> Googling that type gets me nowhere, except supplier-partslists. It might >>>>>> be >>>>>> military supply? >>>>>> >>>>>> It looks to be like the 3BGP* tube, like in this document: >>>>>> https://ia800407.us.archive.org/26/items/bitsavers_sylvaniadaataSheets_13046152/Sylvania_CRT_Data_Sheets.pdf >>>>>> The pins are actually already connected to wires some 20cm long, and >>>>>> the pins are completely sealed in white caulking-like rubber. >>>>>> >>>>>> Anybody have some info on this tube? >>>>>> >>>>>> Iwan >>>>>> >>>>>> On Friday, December 11, 2020 at 10:42:35 PM UTC+1 Pramanicin wrote: >>>>>> >>>>>>> Did anyone else on the list buy one of those recent CRT clock kits >>>>>>> that was listed on eBay? >>>>>>> >>>>>>> like this one... >>>>>>> >>>>>>> >>>>>>> https://www.aliexpress.com/item/4001330655526.html?spm=a2g0s.9042311.0.0.1a084c4d8VxYDr >>>>>>> >>>>>>> I have a kit, but they never shipped the instructions, so if anyone >>>>>>> has some that would be great. >>>>>>> >>>>>>> Thx, >>>>>>> >>>>>>> Nick >>>>>>> >>>>>> -- > 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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/c5303f79-3e41-4d42-8be3-033e7119a530n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/c5303f79-3e41-4d42-8be3-033e7119a530n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CABj2VaaukV7LfhPwYmNfUJ_xfGLVfpE8GBGpEd5nmbgWETiRNw%40mail.gmail.com.
