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Test digitronů v zesilovači /Nixie - tube test in my 2nd tube amplifier

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Published on Aug 18, 2008

digitrony: ZM1040 a ZM1041S. Dekadický digitron je buzen referenčním napětím ktere se reguluje potenciometrem, který je spřažen s tandemovým regulátorem hlasitosti. Obvod A277D spíná přímo bez spínacích tranzistorů segmenty digitronu. Ale nejde to na plnej jas digitronu : ten se nastaví velikostí odporu v anodě digitronu. Takhle už jsem zničil 4 A277D.
This video show test of two nixie-tubes Tesla ZM1040 and ZM1041S.
My amplifier contains four EL84 power pentodes, two double triodes ECC85 ( uses to signal invertor) , and two double triodes ECC83. It constitutes tone corector ( Bass and Treble). Two tubes in power indicator is EM80. Output transformers are homemade. Power supply have +350V DC to anodes EL84 and ~6,5V to heating all tubes in amplifier. Nixie tubes needs 180V DC to light. Particullar segments of nixie tube ZM1040 is driven by integrated circuit A277D ( approx. UAA180). Second nixie-tube ZM1041S display digits U, V, W, X, Y, Z ,+, -. It's conected to indicate inputs.

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