help with sb 220

[JustinDePolis2]

The previous owner sounds like an absolute "NUT"! Let me get this streight, he shorted the pins of the tube with a screwdriver? What is this supposed to do? (it does nothing)


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[buckwhite]

hello, i have an sb220 that i am trying to get going again and need some help. after i got the amp i plugged it in and it had no output at all. i tried all the easy stuff and tried about three times to get it to work, all of a sudden when the amp was just sitting there it arced pretty bad, in the area of the tubes. i unplugged it and took it out of its enclosure. thats when i found the choke burnt. i later found the disconnected wire going to the circuit board and the bottom half of the resistor was rolling around in the bottom of the chassis. are all the occurences related? i know the cap not being connected could have something to do with the choke going out but what about the resistor? it is in 2 pieces and the middle is nice and charbroiled. this amp was shipped to me, is it a possibility that the leg of the cap was cold soldered and just came loose in transit? could this have caused this all? or maybe something else? what other components should i check? also, i need help locating one of those 50uh rf chokes. i didnt have any luck with an exact match at rf parts. any other ideas? part numbers would help a lot. i am going to try and add some pics to give everyone a visual about this... thanks, L8ter<hr />

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CDX-316

</p>Edited by: <A HREF=http://p067.ezboard.com/bworldwidecbradioclub.showUserPublicProfile?gid=buckwhite>buckwhite</A> at: 10/9/04 7:42 am