freq meter
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Antennas : Antenna Calculators- Dipole Calculator in JavaScript
- Input the desired resonant frequency and it will calculate lenght in inches feet and meters
[ Hits: 4715 | Votes: 20 | Rating: 6 ]
- Comparison of Beverage antenna
- A ranking of receiving antennas based on noise being evenly distributed in all directions. These rankings are most accurate in the frequency range of AM broadcast, 160 or 80 meter bands
[ Hits: 2854 | Votes: 2 | Rating: 6.5 ]
- CobWeb multiband folded dipole
- The cobweb antenna it is basically a 5 band antenna comprising of 5 full half wave dipoles for each band - between 10 meters and 20 meters, the antenna is also resonant on 6M and can be modeled even for VHF frequencies.
[ Hits: 8620 | Votes: 0 | Rating: 0 ]
- Transmission Lines
- Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
[ Hits: 1272 | Votes: 0 | Rating: 0 ]
- 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: 5035 | Votes: 4 | Rating: 8 ]
- A & A Engineering
- Smart Battery Chargers, WeatherFAX, Color SSTV,GPS-Based Frequency Standard, Power/SWR Meter,
, Digital Frequency Synthesizers
[ Hits: 1704 | Votes: 1 | Rating: 1 ]
- OAK Hills Research
- CW transceiver kits, QRP, frequency counters, QRP wattmeters, Dummy loads and QRP Parts
[ Hits: 4428 | Votes: 3 | Rating: 6.5 ]
- BK Precision
- Power supplies, electrical testers, battery analyzers, cable tester, rf generators, spectrum analyzers, Digital/Analog Oscilloscopes, Multimeters , attenuators, frequency counter
[ Hits: 2181 | Votes: 0 | Rating: 0 ]
- Eliminate QRM from 6 meters band
- The circuit described below will substantially reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequencey by TREVOR, G3ZYY
[ Hits: 1567 | Votes: 1 | Rating: 10 ]
- 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: 437 | Votes: 0 | Rating: 0 ]
- 6-Meter Ham Frequencies
- Alan Muir, VE7BEU, on behalf of the Westcoast Amateur Radio Association,(Victoria) is assembling and submitting the 6-meter Repeater pairs in use to the BC Amateur Radio Coordination Council.
[ Hits: 623 | Votes: 1 | Rating: 10 ]
- Fox Delta Amateur Radio Projects & Kits by VU2FD
- Amateur Radio Projects & Kits for homebrewers, includes DDS,sound card interface,programmers, hamcom, frequency counter, RF Power Meter, modems and more.
[ Hits: 1299 | Votes: 4 | Rating: 10 ]
- Naptech
- 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: 489 | Votes: 0 | Rating: 0 ]
- HF Beam Calculator
- A javascipt online calculator for 2 and 3 element beam antennas.
Just input frequency and will diplay element dimensions and spacing. Measurements in Feet and Meters by G4VWL
[ Hits: 3438 | Votes: 27 | Rating: 5.45 ]
- RadioRaft
- RadioRaft decodes 10 different ARQ modes, 8 different FEC modes, Packet, Baudot, CW... It works with a Hamcomm interface or a radiomodem. RadioRaft offers automatic detection of modes, speeds and shift. It comes with a frequencymeter/baudmeter included, it has signal frequency tracking and a bit by bit display mode. Very easy to use. practical and fast.
[ Hits: 19836 | Votes: 40 | Rating: 6 ]
- Audio Spectrum Analyzer - OscilloMeter
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- Audio Spectrum Analyzer for Real-time, FFT, OscilloScope, Frequency counter, voltmeter, noise and distortion meter, phase shift meter. Multi-Tone Sound Frequency Sweep Generator. White, pink noise.
[ Hits: 89790 | Votes: 328 | Rating: 6.2 ]
- 50MHz frequency counter, V-meter
- Circuit schematic PCB and photo documentation on building a 50 Mhz frequency counter
[ Hits: 6605 | Votes: 10 | Rating: 4.55 ]
- LC METER
- Inductance and Capacitance meter using``Frequency Shifted Oscillator
[ Hits: 11456 | Votes: 21 | Rating: 4.86 ]
- FM Morse Code Keyer
- A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency.
[ Hits: 2133 | Votes: 3 | Rating: 3.33 ]
- DSP-10 2-meter DSP transceiver
- The DSP-10 is an amateur-radio, software-defined 2-meter transceiver that can be built at home. It operates not only on SSB, FM and CW, but also on four Weak-Signal modes. Features are tailored to operation on VHF, UHF and Microwave frequencies. By W7PUA
[ Hits: 15569 | Votes: 39 | Rating: 8.03 ]
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