NOS in original, but destroyed boxes of rain, all same codes. Inclined square getter (one of the 1st versions made by Mazda!!!), matched pairs available. Military surplus, made by Mazda rebranded Cifte.
These directly heated AF & IF pentodes intended for use in small battery powered old portable and car radios ( Akkord Offenbach U54, Vidor Riviera, Storens Metro B, Philips Picknick, Minerva Portable, Grundig Boy Junior, Lorenz Weekend II, Telefunken Teleport, …) become very popular nowdays in battery preamplifier constructions and headphone amplifiers (Analog Squared Paper – Japan).
Click to see all PREAMPLIFIER PENTODES in stock