air freq
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Antennas : End-Fed : End Fed Half Wave Antenna- End Fed Half Wave Antenna Coupler
- A home made end-fed half-wave antenna coupler with antenna lenght calculator and counterpoise calculator based on center frequency. Includes pictures and drawings along to antenna homebrewing instructions with a home made on air wound transformer
[ Hits: 282 | Votes: 0 | Rating: 0 ]
- Chokes and Temperature changes
- The influence of temperature changes in Common Mode Chokes. To get an indication of the impedance behavior when the core temperature changes, the author tested a CMC by heating it with a hairdryer, and measuring its temperature with an infrared thermometer. When the CMC temperature rises from 30C to 90C, the frequency of maximal impedance shifts down from ca.10 MHz to ca.7.2 MHz, or by a factor 1.4.
[ Hits: 46 | Votes: 0 | Rating: 0 ]
- 20m Indoor Loop Antenna
- This antenna can gets you on the air on 14MHz, and it has a useable frequency range. The VSWR is almost perfect at the centre-frequency abd the design uses no expensive components.
[ Hits: 664 | Votes: 4 | Rating: 6.75 ]
- Collins 618F-1A VHF Aircraft Transceiver
- Restoring a 1965 Collins 618F-1A VHF aircraft radio. This radio was designed for light aircraft as an early frequency-synthesized radio built in 2 separate chassis.
[ Hits: 313 | Votes: 2 | Rating: 10 ]
- Radio Scout Frequencies
- Information on frequencies suggested as Scout amateur radio frequencies. These were initially suggested by the World Organization of the Scout Movement and their Jamboree on the Air organizer. As with all amateur radio frequencies they are a shared resource. If someone else is already on that frequency, move up or down to find a clear frequency for calling.
[ Hits: 45 | Votes: 0 | Rating: 0 ]
- Icom 706MK2G Repair
new
- After years of reliable performance, a 26-year-old Icom 706MK2G exhibited an unusual deviation during FM transmission, with the actual frequency being 10kHz off from the displayed frequency. Additionally, the power meter showed a sharp dip during transmission. Upon investigation, it was discovered that the FM VCO voltage adjust variable had become dirty and sluggish over time. By adjusting the variable capacitor and cleaning it with switch cleaner, the issue was resolved, restoring stable power output and accurate frequency transmission.
[ Hits: 15 | Votes: 0 | Rating: 0 ]
- Simplified Kenwood TS-850 AM Mod
- TS-850 is not much effective on AM since it does produce fairly clean audio, however while it does noticeably improve low-end frequency response
[ Hits: 443 | Votes: 1 | Rating: 10 ]
- FT991 MARS Mod
- This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
[ Hits: 917 | Votes: 5 | Rating: 3 ]
- Frequences aeronautiques
- Airband Frequencies collection in french PDF files by SWL FE10262
[ Hits: 546 | Votes: 3 | Rating: 7 ]
- Major World Air Route Areas Frequencies
- MWARA list of major world air route areas frequencies. A wide network of HF Frequencies has been allocated to provide voice communications between aircrews and ATC.
[ Hits: 753 | Votes: 3 | Rating: 7 ]
- Monitoring The Airwaves During Ukrainian Conflict
- This article reports and collect some frequencies used during 2020 Ukraine war and reported as being used by army forces. HF communications are still a crucial part of military communications and can ben monitored on web sdr radios available on the internet.
[ Hits: 528 | Votes: 3 | Rating: 9.67 ]
- Pittsburgh Area Aviation Frequencies
- A Western Pennsylvania Radio Guide
[ Hits: 194 | Votes: 0 | Rating: 0 ]
- Sports Frequencies - Including Aircraft
- US National Communications Sports Frequencies
[ Hits: 407 | Votes: 1 | Rating: 1 ]
- Intercept Radio
- The radio website that respects the Civil Air Patrol and their copyrights. Home of the world's largest radio/scanner frequency database, include live police scanner recordings
[ Hits: 505 | Votes: 7 | Rating: 8.14 ]
- RF Inductor Calculator
- This air-core solenoid style RF inductor calculator calculates the inductance, wire size, number of turns, and other parameters for an air-core solenoid inductor used in radio frequency (RF) circuits, based on user input of frequency, desired inductance value, and physical dimensions.
[ Hits: 98 | Votes: 3 | Rating: 7 ]
- Air cored inductor calculator
- Online calculator for Input coil data, LC Resonant Frequency and L match
[ Hits: 473 | Votes: 2 | Rating: 1 ]
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