TRANSMITTERS
Category products that transmit radio frequency H.F BANDS
TRANSMITTERS
100Watt Dummy Load (20xResistors Array)The dummy Load uses 20 1Kilo-Ohm 3 watt non-inductive resistors in parallel to achieve 50 Ohms over a wide frequency range. It is submerged in oil to allow somewhat extended operation during tuning or repair procedures. The advantages are: (1) It's cheap, only 2 PCB's act as the connection (2) It provides a very pure 50 Ohm resistance load through 30 MHz and beyond, (3) You can easily add power measurement and rig testing capability.(PCB has a place to install on board a diode and a capacitor ) This one is conservatively designed for rigs that have power output levels up to 100 watt. I built it into a one-quart paint can, readily available at Ace Hardware for about 89 cents. Supplied pcbs can be easily assembled with readily available resistors carbon film .. What is Included 2 x PCB'S ( No Resistors Included )
TRANSMITTERS
40M CW TRX QRP Pixie Kit 7.023-7.026MHzThe Pixie radio is a very simple -watt 40-meter CW transceiver. It is a QRP crystal-controlled unit with a basic straight key input and minimal components. An Amateur Radio license is required to use this kit and to transmit with it. Once built, it has a fixed transmit frequency of 7.023 MHz. The receive frequency can be shifted a few hundred Hz using the variable potentiometer. Specifications: 7.023 MHz crystal supplied BNC antenna connector Straight key input 800 mW to 1 watt output at 9 12V DC LM386 audio amp for headphones or small 8 ohm speaker QRP power: 1.2W with a 40M antenna SWR 2.0 What's Included Supplied as a kit.
TRANSMITTERS
45W SSB Linear Power Amplifier CW FM HF Radio Transceiver Shortwave DIY Kit45W HF Linear Amplifier Module (3-30MHz) for SSB, AM, CW & FM. 40dB Gain (10,000x), 1-5mW input to 45W output. SMA interface, DC 13.8V. DIY kit (Heatsink not included). High cost-performance for amateur radio operators.
TRANSMITTERS
ADX-MINI QRP Antenna TunerWhat is it? The ADX Mini QRP Tuner, designed by Scott Baker (KJ7NLA), is a Pi-network antenna tuner. It features two hex switch arrays acting as a variable capacitor, plus four inductors with binary values (1, 2, 4, 8 µH) and switches across them to vary total inductance. The board also includes an SWR indicator circuit with an LED, allowing you to tune correctly and detect high SWR. Why did you make it? For POTA contests, this tuner is exceptionally small, lightweight, and gets the job done without bulky gear. What makes it special? This QRP antenna tuner is a versatile gadget that lets you easily tune any vertical or horizontal antenna.
TRANSMITTERS
QRP Dummy LoadThe QRP dummy load, equipped with an RF detector circuit, enables the utilization of a standard voltmeter to gauge RF power output, making it perfect for individuals adjusting homemade QRP transmitters. It also incorporates an LED indicator that illuminates when RF is detected. Even extremely low power levels, such as 50mW or lower, will activate the LED. This design takes a different approach by not directly connecting the voltage tap-off point across the 50-ohm load. This configuration ensures the protection of the connected radio, as nothing adverse will occur to the transmitter if the voltage output terminals are short-circuited. The QRP Dummy Load employs a collection of resistors to achieve a reliable 50-ohm match, with each resistor having a power rating of 2 watts. Consequently, the dummy load can handle a maximum power of 16 watts during operation. Although higher power levels can be tested briefly, it is crucial to consider the resistor's rating. Supplied Ready Built and T...
TRANSMITTERS
WSPR BEACON V2WSPR Beacon V2 HF transmitter based on ATmega328 and Si5351 with 3 BS170 output stage delivering up to 5W on 20m. Includes full menu system for configuration. Ideal for WSPR propagation studies and HF beacon operation.
