I have a President Lincon, all band which scans from 26 to 29 I think, it puzzles me greatly as to what those constant tones are that you notch out toward the end of the video. They seem to never stay in the same place frequency wise and drive me nuts when I am cycling through channels in the hunt for a distant voice. Where I live it seems there is none but me on air. NE Scotland east of Inverness. I have tried to google what the tones are but as a greenhorn i cannot find anything that makes sense. i hope to do my HAN licence at some point and no doubt they could tell me at the course but I wonder if you could enlighten me. Beautiful rig, much envy :)
Those carriers ("heterodynes") can have many causes. The one I showed in the demo is the carrier from an AM broadcast station, such a carrier is inherent to AM (amplitude modulation). But carriers can also have other causes, like other hams tuning their antennas (quite annoying sometimes) or they might be unwanted radiation from devices like switching power supplies or consumer electronics. For instance, my Ethernet switch causes quite a lot of interference carriers in the ham bands, at regular intervals. Ferrite beads did not solve it. You wonder how stuff like that ever got approved for FCC part-15.
Nice video very informative. Just have one question do you have to have 2 antenna coax connected to have the dual recieve features OR only 1 antenna? Thank you for anyone that would response to my inquiry? 73 de KH2ZZ
It will work with one antenna connected to one SO-239 input, but if you want to dual-listen to two different bands then the antenna should be resonant in both those bands, otherwise you might not receive much. Cheers.
The second receiver is used when ham radio operators are involved in a “contest” to see who can get the most contacts within the specific time frame. There are different classes available in each contest and one of them is “one person/2 receivers” so in essence, while you are waiting to make a contact with the first receiver, the second receiver is being tuned to find another signal to contact next. Then it goes back and forth back and forth for literally hour upon hour LOL it’s a lot of fun but it does take a lot of patience and persistence to do.
