[AMPS] 3-500Z grid to filament resistance?

[charlie.ocker@tellabs.com (Charlie Ocker)]

Greetings,

I suspect that one or both of the 3-500z's in my SB-220 (original Eimac
bottles, date code 1977!) may have a grid to filament short.  I've
measured about 11 Kohms with my DVOM while the tubes are still in the
socket.  I've heard that I should be seeing around 100 Kohms.

Can someone confirm what the grid to filament resistance of a good
3-500z should be?

Many thanks in advance,

73,
Charlie  N9CO

--
FAQ on WWW:               http://www.contesting.com/ampsfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm