"Fleetie" ...
http://cgi.ebay.com/LOT%2F2-RAYTHEON...20111004r23386

I'm having a "stupid moment": They are sold as pentodes, yet have
only 5 leads. What about the heaters? Well, the heater connections
must be exposed, else they wouldn't work, so what about the other
2 electrodes?


Martin - obviously missing something

Battery stuff, directly heated, so the filament is also the cathode.
On a penthode G3 is almost always connected to the cathode.
Could be something like:

1 f
2 f + g3
3 g1
4 g2
5 anode

Arie de Muynck