[Amps] Burning in an 8877

[TexasRF at aol.com]

There was extensive coverage of this exact subject within the past two  
weeks. You might want to check the archives for some excellent advice.
 
73/k5gw
 
 
 
 
 
In a message dated 8/5/2008 11:10:31 A.M. Central Daylight Time,  
Craig.Anderson at saintpaul.edu writes:

I had  purchased a totally refurbished Henry 3K Classic-X (8877) amp from
Henry  just weeks before they closed their amplifier operation and I had
kept it  in the box knowing that I was eventually going to put a new 8877
in  it.  Since I had two Alpha 78's I really never had the need for  the
amp -- I just wanted one.  The other day I took it out of the box  and
plugged a new 8877 in and hit the switch and "pop" when the  high
voltage.  I hadn't burned the tube in and I thought only tubes  like the
4CX version with screen grids needed "gettering".   



The long and short of it is does anyone have an opinion  whether or not
the tube might have been trashed because of this flash  over?  I plan to
put it in a test fixture I am building with a blower,  filament
transformer and 8877 socket so that I can burn it in for 24-48  hours.
Since the amp has all new sheet metal, new meters, new knobs, new  front
panel and new Export plate transformer I have a few bucks invested  and I
wanted to sell it but wasn't sure how the tube might have been  impacted
by the arc over.



Craig  W9CLA

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