[AMPS] AL-1500 Goes Bang!

km1h@juno.com km1h@juno.com
Sat, 28 Nov 1998 11:24:33 -0500




On Fri, 27 Nov 1998 23:52:47 EST K4ab@aol.com writes:
>
>Right in the middle of the CQWW contest my AL-1500 goes bang.
>
>Thinking that I might have lost a tube, I disconnected the anode 
>connector and
>turned the amp back on.
>
>After the warm-up period, the HV goes to the normal level, stays that 
>way for
>a couple of seconds, then returns to zero.
>
>There are no signs of any charred components.
>
>Any guess what's wrong?
>
>73,
>Larry K4AB

Contest Gremlins are out in force this weekend. 

Check the fuses and holders.
Check the 1N40007 safety diode on the HV filter board
Also possible a metering resistor opened up.
Check the bias Zeners before trying to fire up.

Also possible you had a failure on the timer/overload board but I would
start with the above . 
BE CAREFUL!

73  Carl  KM1H

>
>--
>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
>
>

___________________________________________________________________
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