In East Providence during the daytime, 1110 & 1220 mix to form a new signal on 1330 (mostly 1110's audio is only heard). Also, along the Wampanoag Trail 630 & 920 mix to form a new signal on 1550 and 790 & 920 mix to form a new signal on 1710. Anybody else getting these? Also, on a couple of longwave radios, 1110 can be heard at 210 (I forget the I.F. frequency for both radios but it could be 450kc. which could explain that (1110-210=900 & 450*2=900)). Who else is experiencing this?
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A.M. signals mixing
- Thread starter N1WVQ
- Start date
The latter two are probably "in the radio", as a result of little or no RF selectivity ahead of the converter of these radios.
The first one, though, with 1110 and 1220, is probably an "in the air" product where the image of 1110 at 1330 is reflected
"off of" 1220. On the n side of Chicago where we have 720 and 820, and a really nice image of 720 shows up at 920. But the spots where you can hear this are very limited.
This is for the same reason that on cheap shortwave radios, there were always two instances of where a station could be tuned in. With 455 lhz IFs, the image at 910 kc offset was almost as strong as at the "intended" reception point.
The first one, though, with 1110 and 1220, is probably an "in the air" product where the image of 1110 at 1330 is reflected
"off of" 1220. On the n side of Chicago where we have 720 and 820, and a really nice image of 720 shows up at 920. But the spots where you can hear this are very limited.
This is for the same reason that on cheap shortwave radios, there were always two instances of where a station could be tuned in. With 455 lhz IFs, the image at 910 kc offset was almost as strong as at the "intended" reception point.
Tom Wells said:This is for the same reason that on cheap shortwave radios, there were always two instances of where a station could be tuned in. With 455 lhz IFs, the image at 910 kc offset was almost as strong as at the "intended" reception point.
Thanks for shedding some light on this phenomenon.
This perfectly explains what happens on my ancient Hitachi TRK-W55H Shortwave boombox whenever I try tuning in WBCQ "The Planet", or any of the frequencies of WWCR Nashville.
Needless to say, on AM, this unit has just about ZERO sensitivity or selectivity.
N1WVQ said:Would that happen to be, by any chance, an '80s Ghetto Blaster? ;D NICE!
As a matter of fact...Yes....LOL.
It was a hand-me-down from a friend who thought I would appreciate the shortwave band on it, limited as it may be (it only picks up from 3.2 MHZ to 12 MHZ...but it's enough to tune in once in a while to WBCQ "The Planet", or to find out what Alex Jones is up to on WWCR....
Unfortunately, it's prety deaf on AM, and heavy amounts of intermod make it almost useless on FM.
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