[Milsurplus] Need Tubes

[C.Whitaker]

de WB2CPN
It's old, but does anyone have an idea where tubes for
my little panel-mount aircraft LF receiver can be found?
Used for LF Beacons, Radio Ranges, and Control Towers.

14H7 (2)
14J7  (1)
14R7  (1)
28D7  (1)

Thanks,
73  Clete
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