[AMPS] SB220 Failure

[Dennis Ashworth]

Hi Folks:

I finally got around to wiring the shack in our new home for 220VAC, and
plugged in my vintage SB220 for 48 hours of CW contesting. After the
step-start circuit disengaged, there was a load pop and flash from the
high voltage section behind the meters. The amp had been off for six
months. I checked the
AC mains, and found 245V! The old QTH had 220-225V ... and the amp had
run flawlessly at this voltage for 15 years. My theory (and I am asking
your opinion) is that the old filter caps probably decided the 10%+ extra
voltage was too much! BTW, the diode board was replaced last year with
one of Harbach's.

Thoughts??

Dennis, K7FL
Battle Ground, WA

___________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]

--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm