Ever since putting my antenna higher up in the air a few months back, after having no antenna up for at least two months prior to that, i have had a solid S-4 noise floor 24 hours a day 7 days a week.
no buzzing or anything, just general static at S-4 all the time.
This was on two different receivers with different circuitry, both using a 455khz second IF frequency.
one of them is a SSB radio and i noticed that the noise level dropped off significantly on SSB, but just wrote it off to differences in AM and SSB modes.
So, i happen to be working on a radio that uses a single conversion AM receiver with a 7.8mhz IF, and was amazed to find that when i connected it to my antenna, i was only reading 1/2 an S unit of static.
this is what i was used to seeing on all my radios many months back with my old antenna set up.
I thought it might just be a weak receiver but local stations are coming in at the same strength as always.
The only thing i can figure is that the difference lies in the 455khz IF.
Has anyone else had any interference that seems to only apply to radios using a 455khz 2nd IF?
if so, or really anyone who wishes to hazard a guess, what do you guys think this interference could be from?
I doubt it's from an actual AM broadcast station, as no one is building any new ones these days, and i have lived at this location for almost 8 years with no issues like this.
thanks in advance for any advice and information on where i should start looking for this interference source.
LC
no buzzing or anything, just general static at S-4 all the time.
This was on two different receivers with different circuitry, both using a 455khz second IF frequency.
one of them is a SSB radio and i noticed that the noise level dropped off significantly on SSB, but just wrote it off to differences in AM and SSB modes.
So, i happen to be working on a radio that uses a single conversion AM receiver with a 7.8mhz IF, and was amazed to find that when i connected it to my antenna, i was only reading 1/2 an S unit of static.
this is what i was used to seeing on all my radios many months back with my old antenna set up.
I thought it might just be a weak receiver but local stations are coming in at the same strength as always.
The only thing i can figure is that the difference lies in the 455khz IF.
Has anyone else had any interference that seems to only apply to radios using a 455khz 2nd IF?
if so, or really anyone who wishes to hazard a guess, what do you guys think this interference could be from?
I doubt it's from an actual AM broadcast station, as no one is building any new ones these days, and i have lived at this location for almost 8 years with no issues like this.
thanks in advance for any advice and information on where i should start looking for this interference source.
LC