That is a shame. I have an old RCA tube manual I just found. I studied tubes and discrete transistors in tech school, then went to engineering school and got all digital. Right in the transition. Old,,,,,,,
KG5BBF - Chris > On Jul 29, 2020, at 2:18 PM, John Mechura via BVARC <[email protected]> wrote: > > > Well, > > I'll be dipped in s... > shaving cream. > > John, KI5HOC > >> On Wed, Jul 29, 2020 at 2:15 PM Gus Bernard via BVARC <[email protected]> >> wrote: >> John, Fondren EPO's tube tester hasn't worked for years. They'd love to >> have someone fix it - nice project for anyone intersted - call Chris. >> >> Gus, KG5OFB >> >>> On Wed, Jul 29, 2020 at 9:02 AM John Mechura via BVARC <[email protected]> >>> 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: >>> [email protected] >>> >>> 73 >>> >>> John, KI5HOC >>> >>> >>> >>> >>>> On Tue, Jul 28, 2020 at 9:42 PM Rick Hiller <[email protected]> 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 <[email protected]> >>>>> 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 >>>>> [email protected] >>>>> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >>>> >>>> >>>> -- >>>> Rick Hiller >>>> e-mail: [email protected] >>>> Cell: 832-474-3713 >>>> Physical: 9031 Troulon Drive >>>> Houston, TX 77036 >>> ________________________________________________ >>> Brazos Valley Amateur Radio Club >>> >>> BVARC mailing list >>> [email protected] >>> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> [email protected] >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
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