[Boatanchors] newbie question

[WA5CAB at cs.com]

This is an often repeated statement, implying that if the tube tester says 
the tube is bad but it still works in the set, the tester is wrong.  A tube 
can still work in a circuit but be bad.  Meaning in most cases that it's 
gain is lower or much lower than the minimum acceptable for the type.  So if 
the tube tester result is ignored, the repair person never figures out what's 
wrong with the radio.  Moral of this story is that if you have a good tube 
tester and it says a tube is bad, believe it.  

On a somewhat related subject, several of us have run enough tests over the 
years to confirm that the I-177 and TV-7 setting chart settings for the 1R5 
are wrong.

In a message dated 06/30/2013 19:01:43 PM Central Daylight Time, 
rbethman at comcast.net writes: 
> Others have already pointed out that the *best* test for a tube is the 
> circuit it gets used in.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480