frequency range

frequency range

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• Common-mode chokes - Chart that present results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
  [ Hits: 607 | Votes: 2 | Rating: 4 ]
• RF Chokes - A chart presenting the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
  [ Hits: 906 | Votes: 2 | Rating: 7.5 ]

• 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: 668 | Votes: 4 | Rating: 6.75 ]

• T2FD Antenna - Terminated and twisted folded dipole - T2FD is a 600-900 ohms folded dipole, terminated with resistor. Feed impedance is coupled with 50/600 ohms voltage balun. It is a wide band antenna with rather low SWR over the full designed frequency range: antenna tuner is seldom needed.
  [ Hits: 489 | Votes: 0 | Rating: 0 ]

• Trapped vertical Antenna - This antenna is an omnidirectional and multiband and it is well suited for DX enthusiasts with limited space. Each of the parallel circuits (trap) behaves like an isolator on its resonant frequency.
  [ Hits: 357 | Votes: 7 | Rating: 2.71 ]

• HG7AN Antenna Analyzer - Antenna Analyzer plus 500 is a multifunctional measuring instrument, very useful for amateur radio activity. Its size allows you to easily take it for relocation as well. Frequency range: 100KHz - 500MHz. Access directly via WiFi. Includes a dual-channel signal generator
  [ Hits: 266 | Votes: 1 | Rating: 10 ]

• HF communication prediction tools - Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to predict usable frequency rage for radiocommunications between two stations allowing to specify frequency and date range. This tool allow calculation with different methods and algorithms
  [ Hits: 169 | Votes: 0 | Rating: 0 ]

• 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: 927 | Votes: 5 | Rating: 3 ]

• Maldol MFB-300 HF vertical antenna review - The Japanese-made Maldol MFB-300 HF vertical antenna offer extremely wide-band performance, with a specified frequency range of 1.0-60 MHz.
  [ Hits: 434 | Votes: 2 | Rating: 5.5 ]

• LAN-IQ SDR - Stand Alone Software Defined Radio, direct sampling receiver from 30 kHz to 1700.00MHz continuous frequency range, LAN interface for remote access
  [ Hits: 258 | Votes: 1 | Rating: 8 ]

• TYT MD-2017 Review - The MD-2017 is a dual band DMR and Analog handheld transceiver with a frequency range on VHF 136-174 MHz and on UHF 400-480 MHz
  [ Hits: 319 | Votes: 3 | Rating: 4 ]

• KG-UV8D Freq Limit - Mod software to expand the frequency range to the full authorized range of the radio and not beyond 134-174MHz 400-519MHz, it will not add the 2.5kHz step
  [ Hits: 711 | Votes: 9 | Rating: 7.56 ]

• Icom IC-2300H Modification - IC‐2300 MARS/CAP mod expanded frequency range 136‐174 MHz
  [ Hits: 2080 | Votes: 12 | Rating: 6.08 ]

• KG-UV8D Programming Software - Wouxun KG-UV8D Standard Programming Software. Used to adjust or expand the frequency range to the full authorized range of the radio and not beyond. 134-174MHz 400-519MHz This software will Not add the 2.5kHz step.
  [ Hits: 581 | Votes: 7 | Rating: 9.29 ]

• Online Signal Generator - An online audio signal generator application capable to reproduce different waveforms with variable frequency range
  [ Hits: 3483 | Votes: 44 | Rating: 4.84 ]

• Universal HF Tracker - The PCB can produce a High Frequency RF signal in the range of 1MHz to 12.5MHz using an AD9833 Direct Digital Sequence (DDS) frequency synthesizer. The signal can be modulated with different Weak Signal modes such as WSPR, JT9 and JT65 using our Arduino 5V/16MHz Pro Micro software.
  [ Hits: 145 | Votes: 0 | Rating: 0 ]

• DIY Ham Radio Loudspeaker - An interesting article on how build an optimal sounding communications loudspeaker capable to optimize sound reproduction at the frequency range from 150 Hz to 3 kHz.
  [ Hits: 524 | Votes: 0 | Rating: 0 ]

• Homebrew a High Performance SSB RTX for 14 MHz - This article describes the construction of a high performance transmitter and receiver for SSB (voice) communication covering the 14MHz (20 meters) high frequency amateur radio band with output range 15 to 20 watts and a top audio sound quality both on transmit and receive.
  [ Hits: 347 | Votes: 5 | Rating: 7.8 ]

• Simple 2.4 GHz SWR Meter - This is a simple 2.4 GHz SWR meter which is based around surplus microwave hardware which can be easily found. The main component is a MECA -20/-20 dB Directional Coupler which has a frequency range of approximately 700 MHz to 2.5 GHz.
  [ Hits: 144 | Votes: 2 | Rating: 6 ]

• SDR Receiver with RTL-SDR and Gnu Radio - This project is a Software Defined Radio Receiver. It has a frequency range of 24MHz 1.2GHz. It can demodulate AM, FM, USB, LSB with selectable bandwidths of 600, 2400, 2800, 3200 and 6400Hz. Using a simple RTL-SDR Dongle and Raspberry Pi 3 computer using GNU RADIO
  [ Hits: 485 | Votes: 1 | Rating: 1 ]

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