other Pentoden-Beam Pentod.

EL12N Powertube with 12-pin steelsocket Y8A- it is made in Germany.
It is very similar to EL...

EL12N Pair Powertubes with 12-pin steelsocket Y8A-made in Germany.
It is very similar to EL3...

EL12N Quadset with 12-pin steelsocket Y8A- it is made in Germany.
It is very similar to EL34...

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Noval B9A 9-Pin tube-valve-base-Röhrensockel
PL 83 Power Pentode
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Noval B9A 9-Pin tube-valve-base-Röhrensockel
ECL 81 Triode/Pentode
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Magnoval 9-Pin base with 6mm Top Cap
maybe usable as elecrtro static driver tube
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Noval B9A 9-Pin tube-valve-base-Röhrensockel
=EL183 with heater 12,6V/0,3A
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Noval B9A 9-Pin tube-valve-base-Röhrensockel with 6mm Topcap
PL 81 (=21A6) Pentode
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