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yo8tot

GU81m defect?

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Buna ziua,Am 3 tuburi GU81m noi la care cand sunt scuturate se aude cum se misca ceva inauntru. Mai am unul (tot nou dar dintr-un lot diferit) la care nu se aude absolut nimic. Primele trei pot avea probleme (probabil din cauza ca au fost supuse la socuri prea mari )?Andrei

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Buna ziua,Am 3 tuburi GU81m noi la care cand sunt scuturate se aude cum se misca ceva inauntru. Mai am unul (tot nou dar dintr-un lot diferit) la care nu se aude absolut nimic. Primele trei pot avea probleme (probabil din cauza ca au fost supuse la socuri prea mari )?Andrei

Pot misca cioburi de sticla, fragmente de filamente intrerupte sau numai slabite datorita intinderii lor. Mai poate misca soclul din material plastic pe care sunt fixati electrozii.
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Nu e neaparat ceva defect. Cineva spunea ca a auzit "sunand" si GU74. Suportii pe care sunt bobinate grilelepot avea oarece joc in piesele de fixare care sa difere de la lot la lot. La gu81 spatiul de sub anod este usorde inspectat mai ales cu filamentul alimentat la o tensiune redusa pentru a evita "orbirea".

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