Alex, Thank you for the advice. I have a colleague in Moscow who has a big experience with MV89A repair. 73 de Karen, ra3apw
> Date: Wed, 29 Oct 2014 14:57:17 -0700 > From: Alexander Pummer <[email protected]> > > Don't give up Karen, the Morion oxcos are relative easy to repair, you need > one coca-cola can, cut it is pieces until you get a very thin ALU foil, get > some > thicker carton wind around the box of the OXCO's box that way you have a > heat isolation between the OXCO's box and the vise, which you need to hold > it, but hold the OXCO that way, that the bottom part where the soldering is > fare away from the vise, and the can is upside down, "fire up" a relative > large > [ min. 100W] solder iron, if it has temperature setting set to the maximum > and if it is hot push it hard against the OXCO can, as soon as the solder > melted push a piece Alu foil into the gap [ there is a gap between the bottom > of the can and the rst of the can ] and move to the next part to melt the > solder. You need to push in at least 5mm long the Alu foil into the gap, if > you > get it all around, you could pull out the content of the OXCO can. > That is a double oven oscillator, depend what is the problem , you may have > to open the internal can also, usually it is "visible" if something is > broken, just > power up and follow the current paths, with meter and scope probe, it is > practical to temporarily disconnect the oven heating [ the large heater > transistor ]. > I fixed five of them, you need some patience and luck and you have to be > very careful. > 73 > KJ6UHN > Alex _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
