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Unboxing a JBE ★ PL 504 television line output pentode vacuum tube. This valve is probably new & in its original box (NOS new old stock NIB new in box). The glass envelope has JBE ★ & PL504 printed on it in white. Printed on one end of the plain white box is PL504. The type PL 504 has a Magnoval 9 Pin B9D base & top connection cap. It has a heater filament voltage requirement of 27 volts & was first introduced in 1961. I don't know who JBE are or were. A rebrander or manufacturer? If you know please leave a comment on this video. For more information on this valve: http://www.r-type.org/exhib/aaq0571.htm (De Banks PL504 version) http://www.r-type.org/exhib/aaq0268.htm (Marconi PL504 version) http://www.r-type.org/exhib/aaa0422.htm (Mazda PL504 version) http://www.r-type.org/exhib/aaq0572.htm (Mazda PL504 version) http://www.r-type.org/exhib/aaa1787.htm (Mullard PL504 version) http://www.r-type.org/exhib/aaq0265.htm (Mullard PL504 version) http://www.r-type.org/exhib/abv0056.htm (Pinnacle PL504 version) http://www.r-type.org/exhib/abv0057.htm (Pinnacle PL504 version) http://www.r-type.org/exhib/aai0370.htm (Solus PL 504 version) https://www.radiomuseum.org/tubes/tub... (Philips PL504 version) http://www.r-type.org/pdfs/pl504.pdf (Philips PL504 Datasheet Pdf) Philips Factory & Date Codes https://frank.pocnet.net/other/Philip... For more information on old stores part numbers: https://frank.pocnet.net/other/Servic... Vacuum tube, thermionic valve, electron tube https://en.wikipedia.org/wiki/Vacuum_... Unboxing video of vintage electronic components. To watch more vacuum tube & transistor videos please click on the link below Playlist: • Unboxing Vintage Electronic Components In... Videoed on Tuesday, 15th March 2022 © Mike Fairman 2022 Worcester Thank you for watching. If you would like to buy me a drink or make a donation to my channel please click on the link below https://www.paypal.me/MikeFairman Thank you for your kindness & generosity. #UnboxingVintageElectronicComponents Unboxing Vintage Electronic Components