Back in '82 - '83 my tv/radio/vcr/whatever repair shop was doing poorly. I sold my tube testing cabinet for $35.00 to a competitor so as to support my household for a bit longer. Actually a week, almost, with a bit of gas for the truck.
Unfortunately the malaise that I encountered was industry-wide and that competitor closed down in about six months, as did I and others. Many tube checkers may have gone to the landfill during this period, so would have inventories of tubes. I personally was offered the tube inventories of three separate competitors, for free, just to minimize the disposition of failing repair shops. My Mother's attic had room to put these in, but they were not all that much. These are not the high-demand numbers, just a snapshot of what moved slowly or was purchased by mistake and kept. Probably they could be useful if one could convert or re-design a stage so as to implement a similar tube (triode, pentode, etc.) instead of an unavailable replacement. But sometimes one gets lucky --- I have a "new" Raytheon 13DR7 tube. It is a vertical oscillator / vertical output tube, for a series-string B&W 1956 Philco Predicta TV. And it just so happens that I have such a TV in my (Mom's) attic that has vertical deflection issues. Someday... Sorry for the ramble, but the image reminded me and who else but Radio people would understand. I am fortunate to be in y'all's fraternity! 73 John, KI5HOC On Wed, Jul 29, 2020 at 12:29 PM Chris Luppens <[email protected]> wrote: > That brings back memories. > > > KG5BBF - Chris > > > On Jul 29, 2020, at 12:06 PM, Roy Storey via BVARC <[email protected]> > wrote: > > > <Remember.JPG> > > Here....use this. > > Roy W5TKZ -- 73 > > > > On Wed, Jul 29, 2020 at 10:26 AM Jimmy Vance via BVARC <[email protected]> > 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: >> [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] <[email protected]>* >>> *Cell: 832-474-3713* >>> *Physical: 9031 Troulon Drive* >>> * Houston, TX 77036* >>> >> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing >> [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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