AVO Digital AVOMeter DA-114 nixie 4 digits multimeter 1972 скачать в хорошем качестве

AVO Digital AVOMeter DA-114 nixie 4 digits multimeter 1972

Another AVO i think it is a cool brand so i sort of look for this brand and ask my friends to do the same :-) I also really like NIXIE tubes, so this had the be cool, This only made me more sad, I am not able to fix this one the way it should be, main ADC multiplexing IC is called MC902 and i find no information about it anywhere, I am sure the multiplexing is stopped and blocked, most likely this ic is defective. I see 50.0Hz sine wave oscillator and 400Khz osc running, Opamp SN72748P, other IC i can not look up SN7274N, and SN72021 ---- #nixie #multimeter #vintage -- I use auto generated subs, i am sorry there are a few spelling errors, maybe one day they can do it better.. -- (Thanks to all my Sponsors / Traders / Swappers / Sellers / Buyers, without your support and constant flow of cool items in/out, none of this would be possible)