I was given the unit from a friend that hadn't used it in 15 years, as with everything old I generally change electrolitics and any other checks I know before firing something..i did exactly that, pass thru swr remained the same 1/1.2 with dummy load engaged, bias voltage manually keyed was .54v, ohms at base 1.9..yes, I saw that as maybe a bit high? Anyhow when switching to antenna to test, immediately when I turned on power the input 10uh rf choke smoked..it has been replaced before I can see. Any ideas as to what to check next? I have the replacement chokes..antenna issue maybe? It's an Antron 99 grounded to copper pin to earth yet im.sure my metal roof is in its groundplane..still working to get that another 10 ft higher soon..so what do o check next? Any input is much appreciated, thanks!