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dm70 tube

Abstract: DM70 dm701 Scans-0017819 htc one v
Contextual Info: PHILIPS DM70 TUNING INDICATOR INDICATEUR D'ACCORD ABSTIMMANZEIGEROHRE Heating: Direct by battery current, A.C. or D.C.; series or parallel supply. A . In battery receivers Vf = 1.4 V If = 25 mA One of the pins 4 and 5 should be connected to the earthed point of the detector circuit.