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
<http://www.radiotechnika.hu/images/811A.pdf>
My e-mail is:
[email protected] <mailto:[email protected]>
73
John, KI5HOC
On Tue, Jul 28, 2020 at 9:42 PM Rick Hiller <[email protected]
<mailto:[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] <mailto:[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
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--
Rick Hiller
*/e-mail: [email protected] <mailto:[email protected]>/*
*/Cell: 832-474-3713/*
*/Physical: 9031 Troulon Drive/*
*/ Houston, TX 77036/*
________________________________________________
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________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected]
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
