Any chance the documentation could be shared to all? Thanks Ian
> On 22 May 2021, at 04:14, Bill Stanley <[email protected]> wrote: > > > OK, that was quick. Opened the box, all parts appeared to be in good shape, > but no documentation of any kind. If I could prevail on the other builders > for a copy of the instructions/schematics, it would speed up my build. > > Thanks; > -Bill- > > >> On Friday, May 21, 2021 at 6:23:56 PM UTC-7 Bill Stanley wrote: >> Toss another kit on the barbie.... >> >> My kit arrived today so I will be building it over the weekend. Watching the >> comments closely. >> >> -Bill- >> >> >>> On Friday, May 21, 2021 at 5:14:24 PM UTC-7 gregebert wrote: >>> I have an Aneng UT61e; cheap but quite good. One of my scopes has a pair of >>> 100x probes that lets me look at a few kV, but I was too lazy to bring it >>> up today. If I run into problems I'll post some screenshots. >>> >>> After installing the diff-amp transistors and Q1, current-drain increased >>> to 360mA. >>> >>> I suggest you bench-test your power-supply board by itself first; >>> disconnect all cables, and jumper J5-4 and J5-5 together to enable the HV >>> supply. Make sure all generated voltages are correct, especially the 300V >>> supply (should be around 305V per the instructions). >>> >>>> On Friday, May 21, 2021 at 4:10:55 PM UTC-7 John Snow wrote: >>>> Paying full attention - what model DMM do you have if you can't directly >>>> connect it? I have an 87V I'm happy to connect as it's rated for 1KV. >>>> >>>>> On Friday, May 21, 2021 at 11:38:27 PM UTC+1 gregebert wrote: >>>>> UPDATE 1: I built the power supply/driver board and completed some basic >>>>> testing. I installed all components EXCEPT the transistors for the >>>>> diff-amp that drives the CRT. The standby current at 12V is zero. The HV >>>>> supply can be enabled by grounding the POWER_ON signal; that causes the >>>>> inverter to run and the current is 170mA. The neon bulb is on and it's >>>>> supply is 306V; the +5 and -5 supplies also work. The filament supply >>>>> voltage on my scope is about 500kHz, somewhat sinusoidal, and about 17V >>>>> pk-pk, which is about 6.3 Vrms for a pure sinusoid. The HV is beyond the >>>>> range of my DMM so I had to put a 10meg resistor in-series to double the >>>>> range (inaccurately, because it's a 10% resistor) and measure around 1270 >>>>> VDC. >>>>> >>>>> Next step is to build the other board. Stay tuned. >>>>> >>>>>> On Thursday, May 20, 2021 at 7:34:52 AM UTC-7 John Snow wrote: >>>>>> >>>>>> I've been checking over solderjoints, hoping to find a Q or U with a >>>>>> solderbridge, no luck. >>>>>> >>>>>> Ah, I hadn't made the connection - I found your build guide before, it's >>>>>> what made me decide to order one. It's been useful for making A or B >>>>>> comparions for anything standing out. >>>>>> >>>>>> I've also been checking over the circuitboard hoping to find a Q or U >>>>>> inverted, but they're all following the soldermask guides. >>>>>> >>>>>> There's no breakout for and ground VCC_300 to easily probe? >>>>>>> On Thursday, May 20, 2021 at 8:10:06 AM UTC+1 Paolo Cravero wrote: >>>>>>> John, >>>>>>> pictures of my build are here: >>>>>>> https://ik1zyw.blogspot.com/2020/10/kit-oscilloscope-clock-8sj31j-review-3.html >>>>>>> >>>>>>> The code on the HV board is the same. I think I reversed a 79Lxx, but >>>>>>> the smell of it burning was too obvious and I cannot tell what the >>>>>>> effect was on the CRT. >>>>>>> >>>>>>> I do get intermittent failure probably caused by a cold joint at a >>>>>>> ground point that was not designed with thermal relief and it took me a >>>>>>> while to solder. >>>>>>> >>>>>>> Paolo >>>>>>> >>>>>>> >>>>>>>> On Thu, May 20, 2021 at 12:49 AM John Snow <[email protected]> wrote: >>>>>>>> Hi Paolo, >>>>>>>> >>>>>>>> no filament glow after one minute powered on, >>>>>>>> >>>>>>>> both fuses continuity checked, they've not blown >>>>>>>> >>>>>>>> I'm getting 60V across the indicator bulb. >>>>>>>> >>>>>>>> Which voltage regulator did you reverse? >>>>>>> >>>>>>>> -- >>>>>>> >>>>>>>> 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 view this discussion on the web, visit >>>>>>>> https://groups.google.com/d/msgid/neonixie-l/3f6e2a4a-ed6d-485d-9ccc-a0dfc157b451n%40googlegroups.com. > > -- > 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 view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/cccf50e1-f8bd-4b6e-a5ea-98e05e945f7cn%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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