[Amps] BURNING IN A TUBE

[TexasRF at aol.com]

Colin, you are just bragging about the first few hours failure of a condom, 
 right?! 
 
73/K5GW
 
 
In a message dated 3/23/2013 8:23:54 A.M. Pacific Standard Time,  
k7fm at teleport.com writes:

The  article is neither relevant nor useful to a tube.  Any mechanical or  
electrical device is more likely to fail in the first hours of use.  A  car 
engine or aircraft engine or transmission or light bulb or ball point pen  
or condom is more likely to fail in the first few hours.  The best way to  
test it is to turn it on and use it.  

With regard to a vacuum  tube, if you just bought the amp with new tubes, 
the most likely time of  failure is when you turn it on, simply because it 
might have suffered damage  during shipment.  And, if it fails, the most 
likely failure will be a  crack causing a vacuum leak.  In that case, you turn 
the amp on and the  tube goes poof and dies.  Notify the manufacturer and get 
a new  one.  If the tube is cracked, nothing you can do will save it.   
Otherwise, if the tube is new, it should play and play and play.   

Anytime you turn a switch on, something may fail.  

There  has been ongoing discussion about tubes that are not new and have 
been stored  for years or decades.  In that case, how the tube is 
"conditioned" may  affect the remaining life.  

So, the website cited does not change  my opinion.  Turn the amp on and use 
it.

73,  Colin   K7FM
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