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- Is the National Calling Frequency actually used?
146 520 MHz is the national calling frequency for FM voice It's a "simplex" frequency, meaning that you call on this frequency and then listen for a reply on the same frequency (It is "national" in the US, but that does not guarantee that many people are actively monitoring this frequency!
- united states - Whats the difference between national calling . . .
The simplex calling frequencies (146 520 446 000 Mhz) are intended for FM simplex communication, while the other pair (144 200 432 100) are for SSB In general use, the term "simplex" implies FM modulation since FM is commonly used in both simplex and duplex operation
- What is a calling frequency? - Amateur Radio Stack Exchange
So, calling frequencies are well used For example, on 2-meters, you can agree to meet someone on 146 52 (2 meter simplex FM calling frequency) and then when contact is made QSY to some other open frequency It is not polite to tie up the calling frequency When I am mobile, the only VHF ops I do is hanging out on the 2-meter calling frequency
- Why is there a repeater on 146. 46? Isnt that a simplex frequency?
SERA Band Plan 146 400 - 146 585 includes " alternate repeater inputs" that covers my question perfectly The ARRL ought to provide the advice you've offered to everyone on their site, IMO The club rep told me "We can't hear you on 146 460 but the repeater can with a tower on top of the mountain " so I thought the frequency was clear
- Calculating Antenna Length on the FCC Exam vs. in Reality
If you find the wavelength for the given frequency, then just find the type of antenna (quarter-wave), take the appropriate fraction of the wavelength, and convert said quantity to the appropriate units For example, the wavelength for a 146 MHz signal is 2 05 m, multiply by 39 and you have 80 inches
- Should I chose a vertical or a horizontal HF antenna?
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- united states - Choosing simplex frequency as a technician - Amateur . . .
146 52 National Simplex Calling Frequency; 147 42-147 57 Simplex; 70 cm 432 10 70-cm calling frequency
- digital modes - Help Identifying RF Data Protocol - Amateur Radio Stack . . .
I hope this is the correct place to ask At my university, we've been picking up some strange transmissions on 146 66625 MHz in the engineering buildings The noise persists at nearly full strength between 146 66125 and 146 67125 before completely dropping off Using directional finding we've isolated it to a large steam pipe in the basement
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