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Windows signal function generator sotfware, offers 4 main channels, 4 modulators, 1 measurement generator, 1 frequency standard generator, Amplitude, phase and frequency modulation, can generates real band-limited signals

The RadioFrequency Program is a professional Software dedicated to all HAM, SWL and Radio Listeners. Freeware. Included is a Text-CSV dBase Converter. Connection to the ICOM R8500 Receiver. Special Scanning Feature. Special Search Feature x large dBase.

This circuit will let you look at the signal and frequency output of your transceiver.

A simple free running oscillator oscillating at the receiver\'s IF (intermediate frequency) beats with the incoming signals in either CW or SSB and the resultant audio frequency goes to the AF amplifier.

N3OX three meters Flex Vertical, a Short, Frequency Agile Vertical for 40 meters

Wikipedia page about amateur radio spectrum assigned to the amateur radio service

A sweep generator that produces a sawtooth waveform which sweeps the oscilloscope beam from left to right via its X input, and simultaneously the VCO frequency.

This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.

Sonogram is a highly flexible audio spectrum analyzer for the analysis of sound, music and speech signals in the frequency-domain using different algorithms.

Scanner radio frequency list for athens henderson county texas

FLMSG is a simple forms management editor for the amateur radio supported standard message formats. Form data can be transferred between computers either using standard internet email or via radio frequency broadcasts typically made by an amateur radio operator on your behalf.

A RF Probe circuit for the RADIO frequency experimenter to check the presence of a RF signal and also to measure its strength

Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service

Essentials or basics of RF signal generators or microwave signal generators, their facilities, capabilities and how they work.

Introduction to WSPR beacons. Article describe WSPR2 and WSPR15 beaconing mode and include a frequency reference table for both WSPR modes

BITX ver 3 kits, frequency counters, SDR PCB, spare parts and relate ham radio accessories by VU3SUA

An overview of coax cable often called coaxial feeder or RF cable, used to feed antennas and deliver radio frequency power from one point to another

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

The page provides circuit improvements for the Kenwood TS-440S transceiver, addressing issues such as distortion in SSB signals, limited transmit frequency coverage, lack of crispness in RX audio, and flat audio response. The fixes include adjusting bias, cutting specific components, and changing capacitors to improve performance.

An ARRL article collection about influence of radio frequency with pacemakers and other similar medical devices.

Convert any text in morse code mp3 file, you can choose speed from 5 to 50 wpm and tone frequency

Band pass filters, for radio frequency interference problems.

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.

Digital multimeters, power supplies, frequency counters, RF analyzers, signal generators

This calculator is designed to give the critical information of a particular beam antenna, in this case a three element Yagi, for the frequency chosen.

The resource provides coaxial cable attenuation data, listing signal loss in dB per 100 feet for various cable types across a frequency range from 1 MHz to 5.8 GHz. The initial table details attenuation for cables such as _RG-58_, _RG-8X_, and RG-213, with impedance values of 50 ohm or 75 ohm, at frequencies up to 1 GHz. For example, _RG-58_ exhibits **0.4 dB** loss at 1 MHz and **21.5 dB** loss at 1 GHz per 100 feet. A subsequent table expands on this data, including LMR series cables like _LMR-400_ and LMR-600, along with other types such as 9913F7 and RG214. This section covers frequencies from 30 MHz to 1,500 MHz, also noting the outer diameter of each cable. For instance, _LMR-400_ (0.405" diameter) shows **0.7 dB** loss at 30 MHz and 5.1 dB loss at 1,500 MHz per 100 feet. The final section focuses on VHF/UHF/Microwave amateur and ISM bands, presenting attenuation in dB per 100 feet (and meters) for frequencies including 144 MHz, 450 MHz, and 2.4 GHz. This table includes larger diameter hardline options like 1/2" LDF and 7/8" LDF, in addition to flexible coaxial cables. For example, 1/2" LDF cable demonstrates **0.85 dB** loss at 144 MHz and 6.6 dB loss at 2.4 GHz per 100 feet. DXZone Focus: Coaxial cable attenuation | LMR-400 | RG-58 | 5.8 GHz

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.

Experimental Longwave Transmissions from Tower Hill wayland Massachusetts Operator Name Warren, Ham Call K2ORS, Frequency: 137.7796 KHz

N1HFX project to improve PL tone encoder providing a more stable frequency

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.

The VersaBeacon is a frequency agile, modulation agile RF source using a DDS chip and minimal support circuitry. It covers a frequency span of 1MHz to 150MHz in 1 Hz steps and provides a variety of modulations

W3HH wide-band wire antenna Article in French. The W3HH antenna, also known as the Terminated Folded Dipole (T2FD), is a compact, broadband antenna for amateur radio. It operates at an angle of 20 to 40 degrees and covers frequencies from 3 to 30 MHz. The antenna features a total length of one-third of the wavelength at its lowest frequency and is fed using a 1:4 BALUN transformer for impedance matching. A termination resistor around 390 Ω optimizes performance, making it suitable for various amateur radio applications while being easy to construct and install.

KC5M frequency measurement with yaesu ft-920

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

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

A tutorial on using RF frequency counter, how a digital frequency counter works, includes frequency counter specifications and best practices in setting counter accuracy and resolution

Multi-frequency radio interferometers

News, frequency guides and programme information, on shortwave and other international media.

US global provider of innovative radio frequency (RF) solutions for spectrum monitoring and antenna applications. Specializes in Spectrum Monitoring, Communications Intelligence , HF/MF Broadcasting & Communication antenna systems.

Amplifiers, filters, attenuators, mixers, PLL, switches and frequency dividers, signal generators, power detectors, transimpedance amplifiers, variable gain amplifiers and more

Gage applied technologies designs and manufactures high-speed data acquisition systems, high-speed digitizers in pci / cpci / pxi or pc oscilloscopes, providing utmost measurement fidelity for high frequency signals.

We stock a range of two way PMR446 radios. PMR 446 is a license free frequency, which means that you can communicate for up to 3km (terrain allowing) without any call charges or license requirements. They can be used in most European countries and are ideal for holiday trips.

The New England Historical Radio Society Inc. is an organization dedicated to the preservation of commercial Morse Radiotelegraphy on medium and high frequency.

Nuand id the maker of bladeRF - the USB 3.0 Superspeed Software Defined Radio, 300MHz - 3.8GHz RF frequency range Independent RX/TX 12-bit 40MSPS quadrature sampling

Aka Circular Waveguide Antenna. This online antenna calculator let you plan your cantenna for the desired frequency of operation, giving the Can diameter you have available.

This calculator calculates the length and width of a patch antenna based on the frequency, dielectric constant of the dielectric and the height of the thickness of the patch antenna substrate.

This Frequency Counter Development Kit is fully functional with the included pre-programmed microprocessor

Inches and meters Javascript Wavelength Calculator allow to input a frequency in MHz and calculate wavelenght in several units considering also fractions of wavelenght and the velocity factor. Includes an usefull inch to meter converter

FMI provides superior solutions in the design and manufacture of frequency control devices including Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXO), voltage controlled crystal oscillator (VCXO), Temperature Compensated Crystal Oscillators (TCXO), crystal clock oscillators, high temperature oscillators, surface mount and crystal oscillator products, phase locked sources and more.

Transferring Radio Frequency Energy from Your Transmitter to Your Antenna by Don Keith N4KC