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Operating QRP at the lowest possible power during contest article by PA1B

TO2SP dx pedition Online log powered by qsodirector log system

HA8DU European manufacturer of quality amateur radio antenna tuners for HF Bands, from 10 meter to 160 meters band. Products includes manual and automatic antenna tuners, power handling till 3.5 KW. HA8DU produce even custom made variable capacitors and rotary switches.

A guide to properly use FT8 ALC and power when transmitting in FT8 Mode. Incorrect usage of power and audio from your computer may cause unreadable signals and transmit harmonics that can didturb other signals.

Specializes in providing portable power solutions. Custom battery pack assembly is primary function, but also distribute batteries for many battery manufacturers.

An article describing equipment needed to make portable operations evenin winter cold times. The article is completed by a nice video describing not only the radio setup but even the tent and power supply equipment

Manufacturer of precision equipment, Power meters Wattmeters

Power transformers for electronic, toroidals,three-phases

One way to keep your home station on the air during a power outage.

A linear regulated power supply 2A, 20 V designed mainly to get used to soldering and have something usefull as final result.

An interesting guide to installing software on a Raspberry for amateur radio use. This documentation cover the Raspberry Pi 4 version that whose hadware is powerfull enought to fullfill all requiriements for ham radio programs.

A QRSS beacon on 30 meter band project wind and solar powered based on a loop antenna.

PowerFilm, Inc. develops and manufactures thin, flexible solar modules for OEM, military and consumer needs.

Traveling Wave Tubes , Conventional Traveling Wave Tubes, Microwave Power Modules manufacturer

High Frequency Expermental Beacon "WV". The Beacon operates on the frequency of 13.55567mhz. This Beacon is very low power. It operates under Part 15 of the FCC Rules and Regulations. It transmits with only 1.5 milliwatts of power

Reducing and removing RFI Noise

50 Ohm Coax Antenna Power Splitter and Matching Network

Martek Power designs and manufactures a wide of high performance power supplies for various industries. Power supplies AC-DC, DC-AC inverters, DC-DC, EMI Filters

23 cm PA with Mitsubishi RA18H1213G

A non profit organisation run entirely by volunteers to promote Low Power Radio.

A 12V powered, 4x15 Watt quad audio amplifier

Test and measurement instrumentation, AC & DC power supplies, power sources and analyzers, data acquisition systems and boards

Can Home Solar Power and Ham Radio Coexist? It is possible, with minimal interference from the solar power system, provided you make some modifications.

PV Solar Panels, Photovoltaic Panels, Solar Power

Basic electronic circuit laws, capacitors, resistors, power circuits examples

Relays, controllers, power meters, fault recorders, power sensing products

Demonstrates the construction of a high-power 6-meter (50 MHz) amplifier, specifically designed for demanding modes like EME, TEP, and multiskip Es. It details the use of a _GU-43B_ tetrode in a grounded-cathode configuration, emphasizing the need for stabilized grid voltage and input capacitance compensation. The resource provides a comprehensive schematic, power supply design, and practical considerations for component sourcing, particularly for high-voltage and high-current sections. The builder achieved an output power of **1250 watts** with an anode current of 0.65 amperes and 3200 volts anode voltage. The article also covers the physical construction within a modified P6-31 enclosure, outlining the internal layout for RF and power supply sections, and includes photos of the completed unit. It highlights critical safety precautions for working with high voltages and reactive currents up to **20 Amperes** in the P-network.

Provide RF connectors, adaptors, antennas, accessories, mounts, coax, West Mountain Radio Products and Anderson Power Products available.

Worldwide leader in wind power generators

Selecting capacitors in RF power applications at HF by I0JX

Home of the repeater with the world's largest backup power supply

Haredata Electronics is your one stop shop for Power Supplies, Chargers, Battery Packs & Accessories. Power Supplies Chargers, Battery Packs , Power Supply Accessories , Haredata Electronics Limited,

Testing a linear regulated power supply using headlight bulbs for loading.

Attenuators, Couplers, Power Dividers, Terminations

The Japan Amateur Radio League (JARL) is cautiously watching new developments concerning the commercialization of Power Line Communications (PLC), while continuing to carry out joint experiments with a high speed power line communication promoters' alliance to reduce potential interference to radio communications.

High power, UHF, L-band, S-band, C-band, microwave frequency amplifier and oscillator devices, pulsed, CW, fixed-tuned, or tunable devices in the range of 600 MHz to 2000 MHz

RF Wattmeters - RF Power Measurement - Bird Wattmeters Telewave - Coaxial Dynamics Wattmeters - Daiwa Wattmeters

What is VSWR and why you should care, formal definition of VSWR and SeaSonde Measurements, formulas

A non profit organisation run entirely by volunteers to promote Low Power Radio.

A 3CX1500/A7 8877 144mhz W6PO amplifier, that running a little over 4kv on the plate, this Amp will do over 2kw out.

Anderson PowerPole 15/30 Amp Connector

Frequency Counter w/Selective Power Measurement, Microwave Sythesized Signal Generator

A home made magnetic loop for HF Bands. This small and compact loop is designed to support small power transmissions on HF bands, from 7 MHz to 21 MHz

A very compact and multifunctional digital amateur radio station for the radio operation at home, on the way or in the emergency radio implemented with a Raspberry Pi 4, an Elecraft KX2, a Kenwood TH-D74 and a USB GPS.

+/- 15 V, 1.5 A power supply project

Icom-PW1 Power Supply repair and improvements

Active Receiving Antennas, designed for reception of shortwave, mediumwave and longwave signals and VHF/UHF signals

Sell quality electronic components, equipment, and accessories. Test equipment, RF Modules, Power supplies, PCB, Stepper motors.

W8TN article on repairing an Alpha 87a power amplifier

A document describing the reparing and restoration of an old Heathkit SB-101 power amplifier