Is there any way to test a 211A tube, other than filament continuity ?

9/29/2009 3:16:26 PMAdamC

Other than in circuit ?

9/29/2009 4:03:26 PMRalph Schneider

:Other than in circuit ?Yes Adam, I have a very old Hickcock tube tester that will test all of the old triodes( 4 pin) and Pentodes, ect. it stops at the octal sockets. If you hunt around may be you can find someone in your area that has a old tester. Or if your in Nebraska bring your tubes over, I will test them for you, Ralph.
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9/29/2009 5:49:41 PMNorm Leal

211A is a transmitting tube with base larger than on most tube testers. The filament is made to operate on 10 volts @ 3.25 amps.

Here are the specs.

http://www.mif.pg.gda.pl/homepages/frank/sheets/049/2/211.pdf

If the filament lights and there is silver gettering on the glass most likely your tube will operate. With a lot of use there may be a brown color inside the glass.

You could check for emission between filament and grid but for proper testing need high voltage on the plate.

Norm

::Other than in circuit ?Yes Adam, I have a very old Hickcock tube tester that will test all of the old triodes( 4 pin) and Pentodes, ect. it stops at the octal sockets. If you hunt around may be you can find someone in your area that has a old tester. Or if your in Nebraska bring your tubes over, I will test them for you, Ralph.
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