frequency547 links - and 9 categories
Antennas : Antenna Calculators
- Input the desired resonant frequency and it will calculate lenght in inches feet and meters
[ Hits: 4517 | Votes: 20 | Rating: 6.00 ]
- Vertical antenna for Vacation
- Vertical Vacation Antenna for 80, 40 and 20 Meter-Band, by Herbert OE3BMB
This antenna is a full size λ/4 for 20m and 40m band, and a shortened λ/4 for the 80m band.
Generally on the 40m band the SWR is under 1,6. In 80m and 20m band at the resonant frequency the SWR is about 1,1.
[ Hits: 4821 | Votes: 4 | Rating: 8.00 ]
- Petlowany Antennas by K6NO
- WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length
[ Hits: 3350 | Votes: 9 | Rating: 6.22 ]
- Provides technology and solutions for the electronic test and measurement, optical, rf and microwave, wireless, wired, telecommunications. Make Frequency Counters, Antenna and spectrum analyzers, power meters, signal generators
[ Hits: 681 | Votes: 0 | Rating: 0.00 ]
- Keithley Instruments Inc.
- Digital multimeters, power supplies, frequency counters, RF analyzers, signal generators
[ Hits: 506 | Votes: 0 | Rating: 0.00 ]
- Victor Electronics
- Accredited oscilloscope manufacturer for over 20 years produce digital oscilloscope, multimeters, frequency counters
[ Hits: 759 | Votes: 0 | Rating: 0.00 ]
- TekNet Electronics
- Frequency conunters, multimeters, oscilloscopes, spectrum analyzers, power supply and RF network analyzers.
[ Hits: 936 | Votes: 0 | Rating: 0.00 ]
- Gage Applied Technologies
- 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.
[ Hits: 396 | Votes: 0 | Rating: 0.00 ]
- BK Precision
- Power supplies, electrical testers, battery analyzers, cable tester, rf generators, spectrum analyzers, Digital/Analog Oscilloscopes, Multimeters , attenuators, frequency counter
[ Hits: 2038 | Votes: 0 | Rating: 0.00 ]
- BCFMCA D-STAR System
- British Columbia Frequency Modulation Communications Association
[ Hits: 279 | Votes: 0 | Rating: 0.00 ]
- Low Frequency operations by W3EEE
- A squint at the world of LF
This website was initially thrown together to provide ready availability to data being collected from the measurement of a transatlantic LF (Low Frequency) path.
[ Hits: 346 | Votes: 0 | Rating: 0.00 ]
- Low Frequency Transmission Modes
- Article by W1TAG on operating modes used on low-banding.
The 2200 meter band (135.7 - 137.8 kHz) is only 2.1 kHz wide, so voice work on SSB or AM is out. Find out the best modes on LF
[ Hits: 350 | Votes: 0 | Rating: 0.00 ]
- Australian Scanning Encyclopedia
- Documents and frequency lists for australian scanning enthusiasts
[ Hits: 4467 | Votes: 14 | Rating: 2.79 ]
- Santa Barbara Scanner Frequencies
- Frequency allocation in Santa Barbara California
[ Hits: 846 | Votes: 0 | Rating: 0.00 ]
- Naptech buys and sells quality test equipment from hp, tektronix, including spectrum analyzers & peripherals, oscilloscope, frequency counters timers, signal generators, multimeters & voltmeters, RF & power meters, microwave amplifiers
[ Hits: 362 | Votes: 0 | Rating: 0.00 ]
- Nuhertz Technologies
- Leading supplier of low and high frequency electronic filter design products for the design of wireless telecommunications equipment, semiconductors and more
[ Hits: 1495 | Votes: 3 | Rating: 7.67 ]
- IBP - Beacon Monitor
- Linux program that helps one with monitoring the beacons of the International Beacon Project, by continuously showing which beacon is transmitting on which frequency, along with the distance and antenna directions by PA3FWM
[ Hits: 1168 | Votes: 2 | Rating: 5.50 ]
- The KB6IBB Utilities
- Ham radio frequency list consolidation software.
The Ham Radio database can house a unlimited number of records. Holding frequency information from DC to Daylight. The Radio Scanner Database is designed to emulate a radio scanner. A 5,000 record table is provided and is organized by channel number.
[ Hits: 849 | Votes: 1 | Rating: 7.00 ]
- Homebrew a CW Filter
- An home-brewed morse code CW filter with a central frequency of 800hz and a variable bandwidth from 230hz to 26hz by F5RDH in french.
[ Hits: 1596 | Votes: 2 | Rating: 2.50 ]
- Harmonic Converter for Spectrum Analyzers
- Extending the frequency coverage of spectrum analyzers, Harmonic mixer by Matjaz Vidmar, S53MV
[ Hits: 1112 | Votes: 1 | Rating: 8.00 ]
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