[Amps] 4CX1600B

[R.Measures]

>Yo 4CX1600B owners
>
>After many years of faithful service, (rode hard, put away wet), my QRO
>3k amp "banged" during the WW. Easy repair, the bridge rectifier for the
>-160 VDC control grid was shorted. Took longer to replace all the screws 
>holding the QRO HFDX-3K amp together then find and repair the problem. 
>
>If this was a 4-1000 in my home brews I would replace the parts and never 
>give a second thought to continue using the tube, but as it's a 4CX1600B I 
>replaced the tube with a new spare. 
>
>Anyone have a history on this tube? Once they arc are they ready for the 
>(as far as I can throw) pitch in the woods?   

***  I would not conclude that the tube arced until an autopsy is done.  
If you heard a loud bang, it is unlikely that it was caused by an an 
internal arc since an arc inside the envelope makes only a little sound 
outside the envelope.  
- - -   Does the circuit in which the 4cx1600 is used have a grid 
terminating R?  If so, is there an inductor in series with said R?  If 
so, how much L?  tnx.
>
>I could put it back in the amp and see what happens but next summer after 
>the contest season.

**  Rich -- If it proves to be a dud, I would like to disembowel it and 
publish the autopsy photos of the guts on my Web site.  
>