Tube valve RSD AK2 79P40

Country:Europe
Brand:
Common type Europe tube/semicond.
Tube type: OCTODE Frequency converter Controlling (mu)
Identical to AK2 = 4M1 = TAK2 = TK2 = WE32 = NMO51 = O406 = VAK2 = RAK2 = 4A16_Ultron = TK24 = VO4S
Similar Tubes
Normally replaceable-slightly different:
A4GDR2
Heater different:
CK1 ; EK1
Other base:
AK1 ; AK2_B7 ; VO4
First year Mar.1935 Tube leaflet collection E.Erb Die AK2 kam später als die AK1.
First Source (s)
Mar.1935 : Philips Bulletin
15.Jul.1935 : Funk
Predecessor Tubes AK1
Successor Tubes 1936 EK2
Base Europe side contact P8A (Au P, 8SC) (Codex=Seo) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.65 Ampere / Indirect / Specified voltage AC/DC

Tube testé au lampemètre de service Centrad modèle 751

(info internet)