Hi Mike, Probably just smoked T4, the voltage sampling transformer in the SWR bridge. That's probably a simple repair.
73, Bob, N6CM On Sun, Jun 29, 2014 at 8:23 PM, Mike Lewis <[email protected]> wrote: > So about 20 minutes prior to starting another successful Field Day with my > trusty K3 I powered it up for the first time after connecting everything > had > just started some tests when my buddy starting yelling that I was letting > some of the magic smoke out of the radio. Sure enough, there was smoke > coming out of the back of the radio. I dived over and pulled the power. To > make a long story short, I was running an S9 31' vertical antenna base > tuned > with an SG-231 autotuner, with the auto tuner powered over the coax using > DC > blocks. The exact same config as I ran with last year with wonderful > results. Unfortunately this year in my excitement I carelessly installed > the > DC block at the radio end BACKWARDS, sending the 13.8v from my 30 switched > supply right into the antenna jack. After the incident I powered back up > with my finger on the off switch to try to assess the level of damage. The > radio puts out some power, but the SWR is infinite even into a dummy load. > I > am not sure of the status of the receiver input chain as I didn't want to > put it back onto a real antenna. > > > > So I am just wondering before I open it up what kind of damage I might find > and what kind of options I might have for repair. Has anyone heard of this > sort of a bonehead mistake? Any ideas on what I might have fried? Given > this > is a mechanical assembly only kit is there any chance any of the parts are > going to be user serviceable? I love the radio and I'm hoping it is at > least > salvageable. > > > > Thanks for any insights, > > Mike/KE0MF > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
