[AMPS] Thar she blows

[measures]

>
>? The failure of which components, Phil?  //   Most of the 3-500z
>failures that I have seen are due to a fil./grid short following a
>'big-bang'.
>
>I guess over the years I have seen all of the SB-200/220 etc. components
>fail. Nothing comes to mind that I have not seen crispy-crittered at one time
>or another. "Big bangs" take place because something has failed, changed
>value, degraded, or been mistreated. The "big bang" usually covers up the
>"tink" sound of the grid/fil. short. 

€  It seems to me that a grid/filament short can not cause a big bang.  I 
tried shorting the grid to fil. while the amplifier was keyed up and 
nothing happened - 

>A good piece of test gear for finding
>sources of big bangs is your nose...they usually stir up quite a stink 
somewhere.

€ True - usually R-supp.  

>Too many guys just replace the shorted tubes, and never find out why they
>shorted. I suspect tube manufacturers love this approach!
>
amen 

cheers, Phil

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com