WTB: PL-175A Beam Pentodes f/Johnson Thunderbolt Amp

[W0UI]

Want to Buy: A pair of PENTA LABS PL-175a
BEAM PENTODES for my Johnson Thunderbolt
Linear Amp. These tubes look a lot like the 4-400a
with similar charactoristics but are electrically
slightly different. According to an old ARRL
Handbook, they are called BEAM PENTODES
rather than, as the 4-400, a Tetrode.
If you don't have any but might know a source,
please let me know.
Thanks.
Woody
w0ui

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