Dear Group, I have a bit of a strange question. My FT847 has nothing but S9 of noise on HF (I work mostly satellite these days so only just noticed it). I tried all bands but seem to be blighted with an S9 signal with or without the antenna connected. The other issue is when I tune to a strong AM station in the lower broadcast band 2.2mhz seemed to be the strongest +50db on AM but the audio is dreadful and sounds splattered, clipped and inaudiable. I have been using a passive loop on HF and I’m fearing DC or a strong signal has landed in the front end and done damage.?
Before I tear my radio apart to resolve this I wondered if anyone had pointers. I know the FT897 used to suffer with S9 all the time due to the 455khz ceramic filters going bad but don’t think the FT847 uses them.
? Any help would be really appreciated.
thanks in advanced,
de Spence M0STO?
see below the test gear on hand to resolve this.
test gear:
Marconi 2955 radio test set
Marconi 2022 Signal Generator
Rigol DSA1030A spectrum analyser
Phillips 3833 60mhz Scope
AF generator?
VVM
logic probe etc.
GDO
Spence G5STO