[R-390] Tube testers and other babblings

[Joe Foley]

> 
>   Is the B&K tester worthy and accurate ? If not, is
> there a certain tester 
> that would serve
> me better?
++++++++++
A tube tester will not INSURE that a tube will work in
a certain circuit, it will only tell if the tube is
"working".  The TV-7 military surplus tester is a good
alternative, yours should be Ok, too.  The thing about
military surplus equipment is that it could be given
to a high school graduate with a couple of electronics
courses under his belt and the appropriate manual and
he could get the job done.

So, now is the time to get some tube oriented manuals
so you can "catch up" on the technique for testing
tubes.  Or,..... just ask more questions here, they
will come up as you get more into this area of the
hobby.


> 
>   All of the tubes I have bought look new. Should I
> test them all? Does 
> testing the tubes
> put wear on them?
++++++++
Yes, somewhat, not seriously though.  You only need to
test them when you get ready to use them.  You might
take a sample of the tubes just to determine if the
whole load got dropped or shipped poorly.  It'd be
best to test tubes of the same type to keep from
wearing the switches out on your tester, they don't
make them anymore either.


> 
>   Most of the tubes I bought are JAN tubes. Some are
> GE. I also got some 
> 5814A's made by
> National Gold Line.
+++++++++
Its considered rude to rub your good fortune in our
faces like this,..... unless, of course, if you paid a
rediculously high price for them, then,.....of course,
it would NOT be rude of US to laugh our butts off.



 Is it OK to use the National
> tubes if there are some 
> JAN's or GE's
> already in the radio or does it matter if one would
> mix and match?
++++++++
NO, definately NOT, the National tubes will RUIN your
radio, send them to me, I will dispose of them so that
no other radio tech will make the same mistake.



> 
>   Lastly, some of the tubes that I bought are dated
> back to the 40's. 
> Should I save these?
> It seems that they would be collectible.
+++++++
NO, we don't "collectible" anything here especially
tubes!  Only audiophools do that.

Joe

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