[R-390] R390-URR BFO Problem

[Flowertime01 at wmconnect.com]

Pete,

I do not know if the R390 and R390A BFO cans are exactly the same. Maybe 
someone with a couple of parts manuals would look these parts up and let us 
know.

The Chinese are making R390A reproduction parts including the BFO cans. I 
seen them on line one day while searching.

>From your mail, it looks as if you have determined the problem is inside 
the BFO can. yes the can comes open and can be serviced. Not a normal 
procedure as the bad can were just replaced as a single part.

In side is some solder joints and several parts beyond the moving slug in 
the coil. There could be a bad joint in there any where including a nicked 
coil wire that opens after some heating time. As the problem is related to "on 
time" it could be more of an RF heating problem than a DC current heating 
problem. 

As the BFO can are available as new and old used parts, You mite as well 
just find your self a new one either from some of the Fellows here on the 
Forum or from the usual commercial places. Fair Radio comes to mind.


Roger AI4NI</HTML>