Greetings, Unfortunately my tube tester is too new to test this tube. I would recommend contacting Chris at EPO, Electronic Parts Outlet, to ask him if his tube checker can test this tube; if it is listed on his chart. He has a stand-up tube tester such as would have been at drug stores of my youth.
The 811 is a triode, utilizing a thoriated tungsten filament as a cathode. As Rick suggests, an ohm meter check of the filament / heater should test for continuity. Then check for shorts between filament, grid and plate, there should not be any. Pins 1 and 4 are the filaments. Pin 2 is unused. Pin 3 is the grid and the plate is on top. Look and see if the plate shows signs of discoloration or overheating. If the silver getter coating inside the glass is silver and not white then the tube is holding a vacuum still. The specs are here: www.radiotechnika.hu/images/811A.pdf My e-mail is: john.mech...@gmail.com 73 John, KI5HOC On Tue, Jul 28, 2020 at 9:42 PM Rick Hiller <rickhille...@gmail.com> wrote: > Couldn't you simply just measure pin to pin and compare one tube to the > others? Find the odd guy(s) out that way. Then, stick them, one by one, > in the "tube testers" from Ameritron, the 811 or 811H. HI > > John, HOC, is the tube guy.....he will know....73...RH > > On Tue, Jul 28, 2020 at 9:18 PM Jimmy Vance via BVARC <bvarc@bvarc.org> > wrote: > >> One of the guys in KARS needs to test a few 811's, does anyone have a >> tester capable of testing these? >> >> >> Thanks >> --jv >> na5d >> >> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> BVARC@bvarc.org >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> > > > -- > Rick Hiller > *e-mail: rickhille...@gmail.com <rickhille...@gmail.com>* > *Cell: 832-474-3713* > *Physical: 9031 Troulon Drive* > * Houston, TX 77036* >
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