Hi Gary, Yep, it's a bummer!
WZ1M wants $260 to rewind the existing transformer. Peter Dahl sells a replacement for $285. I think that Dahl offers a better deal because it is a hypersil unit with a 500 ma CCS rating. I believe the original is rated 400 ma ICAS. Only drawback is the need for 4 new mounting holes. I replaced the tube recitifiers with solid state units shortly after purchasing the 500 (about two years ago). I also inserted thyristers in the primary leads to cut down on inrush current. I wonder if you have any further protective measures to suggest. 73 de Dave, W4QCU Oak Ridge, TN Gary Blau wrote: > Dave: > > Ouch. Sorry to hear that. > Sounds like WZ1M's offer to rewind might be attractive, unless you can > find another 500 xfmr somewhere (good luck!). That's a great rig so > it's worth the investment. > > Now, to find out why it went bad in the first place... > Best of luck. > > Gary > W3AM > > Dave Aabye wrote: > > > > Hello Gary, > > > > Thanks for the suggestion, which I believe has proven to be conclusive. > > > > I hooked my Variac to the primary and slowly increased the secondary > > voltage. > > The caps were disconnect from the rectifiers, so the transformer was "all by > > itself". At about 700 volts, the voltage started to jump just a bit. At > > maybe 750 v, the secondary emitted a puff of smoke with an accompanying > > hiss. > > > > I think it is clear that the transformer is shot. Time to call Peter Dahl! > > > > Again, thanks for your input. > > > > 73 de Dave > > _______________________________________________ > AMRadio mailing list > AMRadio@mailman.qth.net > http://mailman.qth.net/mailman/listinfo/amradio
