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ID = 77426
Tube type:  Numerals- and Symbols indicating tube   Indication 
Identical to LL561
Similar Tubes
Other base:

Filament No heater

Symbolanzeige: + - ~
Uza max: 150 V, Ik: 1.5 ... 2.8 mA, Ub: >170 V;
Made in Poland

Dimensions (WHD)
incl. pins / tip
19 x 52 x mm / 0.75 x 2.05 x inch
Weight 7 g / 0.25 oz
LL561: Radio Fernsehen Elektronik 6/76
Egon Strampe

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