An early Dutch EABC80 built while the factory was still turning out the coin base, a construction that vanished from the noval range almost as soon as it appeared. This is the valve that sat at the detector and first audio stage of nearly every European FM set of the 1950s.
EABC80 = 6AK8 = DH719 = 6LD12 = 6Г3П
Normally replaceable, slight differences: 6T8, 6TD31, 6TD35 - the European type carries heavier screening between heater and triode grid to hold hum down, but the two are otherwise interchangeable
Different connections: 6V8
UABC80 and PABC80 are the series-heater versions for transformerless sets, not drop-in substitutes
Introduced in 1952 to replace the American 6T8, the EABC80 packs a triode and three diodes into one noval envelope: two diodes and the triode share a cathode while the third runs on its own, which is exactly what a ratio detector needs, with the triode picking up the first stage of audio afterwards. The coin base on this example belongs to the earliest Philips noval production, where the electrode assembly is welded straight onto the pins and held by a thick glazed glass disc rather than by large micas pressed against the envelope wall. The seller's reading is that examples like this were assembled from coin bases left over once the factory had moved to the ordinary pinch, which is why they turn up so rarely on a type that stayed in production for another twenty years.
Coin base Dutch glass, unused and still boxed after seventy years. Restorers who know the construction will not need a second look.
SKU: 273