power meter
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Antennas : Dipole- 40 meter portable dipole for QRP operations
- Schematic drawing and instructions for the construction of a simple portable dipole for use in low power and portable operations
[ Hits: 264 | Votes: 0 | Rating: 0 ]
- Homemade Magnetic loops antennas by F5RDS
- Basic magnetic loop antenna examples and loop aerials theory explained. This article inclued some interesting tricks on building magnetic loop antennas and an usefull excell sheet to help compute magneti loop antennas calculating power efficiency from 10 to 40 meters band
[ Hits: 256 | Votes: 0 | Rating: 0 ]
- Semi-automatic antenna tuner project
- Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
[ Hits: 291 | Votes: 0 | Rating: 0 ]
- DJ9PK SWR Meters
- This device was designed as an SWR and power meter for Radio Amateurs. In addition to SWR, it measures forward and backwards power, therefore can also be used as a wattmeter. With a large measuring range from 1 to 1000 watts, it is suitable for use from QRP to QRO
[ Hits: 200 | Votes: 0 | Rating: 0 ]
- PolEx Technologies
- Makers of the The Polar Explorer transmitter, which operates on 9 HF bands from 160 through 10 meters and is capable of 500 watt peak output power on SSB, CW, AM, FM and RTTY. It is intended to be used in conjunction with a transceiver.
[ Hits: 500 | Votes: 0 | Rating: 0 ]
- Ameritron AL-811 Panel Meter Lights
- A solutiom for the Ameritron AL-811(H) RF power amplifier, burnt panel meter lights.
A common failure with the Ameritron AL-811 and similar amplifiers is that the panel meter lights burn out prematurely. These bulbs are usually integrated into the actual panel meter.
The solution for this is to provide the meter backlighting with LEDs.
[ Hits: 1167 | Votes: 2 | Rating: 5 ]
- SW-3B QRP CW RTX
- The SW-3B is a Three-band CW QRP transceiver, Weight 180g, output power 5W at 12v, 2W at 9v, works on 40 30 and 20 meters band
[ Hits: 119 | 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 ]
- Power and VSWR Indication on the FT-817
- Reflected power and VSWR Metering on Yaesu FT-817, and proper interpretation of real values. The power output meter it is a relative indicator of the antenna match that the radio is experiencing. Reference table and how correctly read the values of the Yaesu internal meter.
[ Hits: 147 | Votes: 0 | Rating: 0 ]
- Transmission Line Details
- This utility program shows the impedance and reflection coefficient parameters (SWR, reflection coefficient magnitude Rho, or Return Loss RL in dB) at both ends of a transmission line and the details of power loss in the line. It includes built-in specifications for approximately 100 different line types. You can modify the specs to see how small changes affect the results or to specify custom lines. All program inputs may be changed directly or you can use spin buttons to make the changes.
[ Hits: 127 | Votes: 0 | Rating: 0 ]
- Digital SWR and Power Meter
- This module is an analogue and digital SWR and power meter/monitor, designed to replace analogue SWR and power metering in an AM Transmitter project.
[ Hits: 265 | Votes: 0 | Rating: 0 ]
- Portable SSB transceiver for 14MHz
- 20W portable handheld SSB transceiver for 20 meters band
[ Hits: 177 | Votes: 1 | Rating: 7 ]
- QRP 20m Transmitter
- The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP transmitter that can be used in combination of one of the simple receivers.
[ Hits: 151 | Votes: 0 | Rating: 0 ]
- SWR-Display
- The intention was to determine also very small SWR ratios with small power exactly. With this SWR meter, for example, the inputs of RF amplifiers with power <-20 dBm can be measured. In German
[ Hits: 142 | Votes: 1 | Rating: 8 ]
- Remote Power and SWR Meter Project
- Remotely monitor the output power and SWR of your station via a web browser. WT32/ESP32 based project, combined with a directional coupler setup. It reads two voltages which are supplied by the directional couplers. From these, the respective power is calculated with the help of a calibration data table to be created by the user.
[ Hits: 101 | Votes: 0 | Rating: 0 ]
- Measuring SWR at 1296 MHz
- Have you been looking for an easy way to measure power or SWR at 1296 MHz? One thing is certain, it is not easy - simply because the normal range of SWR meters that most of us have is not up to 1300 MHz.
[ Hits: 248 | Votes: 0 | Rating: 0 ]
- A Simple Field Strength Meter
- Mad your own simple FS meter. It is the simplest thing to make and is good enough to see if the antenna under test is radiating more power than your old ground plane, old mobile vertical or just radiating at all in a particular direction or in all directions.
[ Hits: 158 | Votes: 0 | Rating: 0 ]
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