John chauvin K5IZO used to have several tube testirs.Sent from my Samsung
Galaxy smartphone.
-------- Original message --------From: Chris Luppens via BVARC
<[email protected]> Date: 7/29/20 2:24 PM (GMT-06:00) To: BRAZOS VALLEY AMATEUR
RADIO CLUB <[email protected]> Cc: Chris Luppens <[email protected]>, John
Mechura <[email protected]>, Gus Bernard <[email protected]> Subject: Re:
[BVARC] tube tester 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,
KI5HOCOn 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,
KG5OFBOn 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], KI5HOCOn 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. HIJohn, HOC, is the tube guy.....he will know....73...RHOn 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
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-- Rick Hiller e-mail: [email protected]:
832-474-3713Physical: 9031 Troulon Drive Houston, TX 77036
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