Originally Posted by north tex
The Magnum radios have had their share of problems. Make very sure that you keep the antenna tuned to less than 1.5 VSWR to keep the finals from overheating. A couple of friends with Magnums have had to have final power transistors changed because they overheat and fail. One had his done 3 times before he finally dumped the radio. His antenna was checked repeatedly but it still failed.
I swear with the old tube finals we didn't or rarely had that problem...way back when, when we also built stuff. I still have my old Heathkit DX-60 (or is it DX-90?) in my mom's cellar with my old Swan 350 (not built my me
High power SSB just pushed the old AM sets right off the airways.