majoco
Stirrer
I wonder why the Harris RF590 is tuned to an 80m ham frequency..... 
Finding the frequencies of a HF site
- Thread starter juneau
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n0nhp
Member
Probably because I was monitoring a "potential interference source" ;-)
I think you can just make out the top Sunaire was on 11175, another source of potential interference.......
Bruce
I think you can just make out the top Sunaire was on 11175, another source of potential interference.......
Bruce
Possibly this?
§ 97.401 Operation during a disaster.
A station in, or within 92.6 km (50 nautical miles) of, Alaska may transmit emissions J3E and R3E on the channel at 5.1675 MHz (assigned frequency 5.1689 MHz) for emergency communications. The channel must be shared with stations licensed in the Alaska-Private Fixed Service. The transmitter power must not exceed 150W PEP. A station in, or within 92.6 km of, Alaska may transmit communications for tests and training drills necessary to ensure the establishment, operation, and maintenance of emergency communication systems.
[71 FR 66465, Nov. 15, 2006]
§ 97.401 Operation during a disaster.
A station in, or within 92.6 km (50 nautical miles) of, Alaska may transmit emissions J3E and R3E on the channel at 5.1675 MHz (assigned frequency 5.1689 MHz) for emergency communications. The channel must be shared with stations licensed in the Alaska-Private Fixed Service. The transmitter power must not exceed 150W PEP. A station in, or within 92.6 km of, Alaska may transmit communications for tests and training drills necessary to ensure the establishment, operation, and maintenance of emergency communication systems.
[71 FR 66465, Nov. 15, 2006]
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There are two main factors I can think of. First is that I would want to use a wide bandwidth SDR - the wider the better so you can watch as much spectrum as possible at one time.
The other is activity. If it's used once in a blue moon, the effort of any means may be rather futile.
I wonder if an upconverter would work with the Scout for logging.
majoco
Stirrer
You would need to scan from say 3 to 30MHz and watch it all the time .....boring.
Winradio G33DDC would do the job but rather expensive for a simple task. How about an "untuned" receiver - just an antenna and a diode detector connected to a high gain audio amplifier - you'll have to listen from your car near the antenna to avoid getting all the mains hum and other interference. Similar idea to the "RF sniffers" that security services use to find bug transmitters.
Winradio G33DDC would do the job but rather expensive for a simple task. How about an "untuned" receiver - just an antenna and a diode detector connected to a high gain audio amplifier - you'll have to listen from your car near the antenna to avoid getting all the mains hum and other interference. Similar idea to the "RF sniffers" that security services use to find bug transmitters.
Its not on the AK emergency freq of 5.1675, basically no one is.
I have a WINRADIO G305e that I could devote to this search, I would have to put a rubber duck on it and leave it at the site in a pelican case under a tree. Any thoughts on logging software?
I have a WINRADIO G305e that I could devote to this search, I would have to put a rubber duck on it and leave it at the site in a pelican case under a tree. Any thoughts on logging software?
rfradioconsult
Member
Turn the AC breakers off, come back in a month.
Hmmm... leaving a semi-hidden case at a government communications site. Doesn't sound like a particularly good idea to me...
Leave a note at the site to have them call you... Lol
The area is heavily wooded, I would not leave anything on the site or actual government property, probably just in the general area. Plus, too many dog walkers come thru the area and my gear might grow legs.
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