[image: Remember.JPG] Here....use this. Roy W5TKZ -- 73
On Wed, Jul 29, 2020 at 10:26 AM Jimmy Vance via BVARC <bvarc@bvarc.org> wrote: > Thanks for the info John. I will pass this information on to the > individual who has the tubes > > 73 > --jv > na5d > > On 7/29/2020 9:02 AM, John Mechura via BVARC wrote: > > 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* >> > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing > listBVARC@bvarc.orghttp://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >
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