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Antennas : Magnetic Loop- Indoor QRP HF Loop Antenna
- 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
[ Hits: 323 | Votes: 1 | Rating: 10 ]
- The Z Match Using a Toroidal Core Coil
- Combined with Miniature Tuning Gang Capacitors, a toroidal core inductor is a means to assemble a compact Z Match assembly for Low Power (QRP) use.
[ Hits: 608 | Votes: 0 | Rating: 0 ]
- Small Panel Kits
- High performance, IPX7 waterproof small solar panels and battery packs to power radios, sensors, and other portable devices. Solar panels are UV and scratch resistant for long-term use in the field.
[ Hits: 329 | Votes: 0 | Rating: 0 ]
- HA8DU Antenna Tuners
- 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.
[ Hits: 396 | Votes: 4 | Rating: 7.5 ]
- Duracomm Power Supplies
- Power Solutions for Durable Communication Systems. Founded in Sep. 1992, DuraComm Power Supplies is a worldwide recognized leader in ultra-reliable AC-to-DC switch mode power supplies commonly used in the communications industry.
[ Hits: 139 | Votes: 0 | Rating: 0 ]
- Alpha Power Systems LLC
- Alpha Power Systems, LLC is committed to offering the highest quality of surge protection and power quality products, such us Backup UPS available with service second to none
[ Hits: 129 | 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: 1166 | Votes: 2 | Rating: 5 ]
- Icom IC-2720H One Page Operating Guide
- An operating guide for the com IC-2720H VHF/UHF Radio, includes Turning the power On or Off, Selecting the Output Power, Activating Memory Mode, Operating in Memory Mode
[ Hits: 405 | Votes: 0 | Rating: 0 ]
- FT CALC 1.3 - Ferrite Toroidal Core HF Calculator
- This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included.
The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.
[ Hits: 283 | Votes: 1 | Rating: 2 ]
- Keyhole Radio for Google earth
- The ultimate Keyhole Markup Language (KML) plugin for Google earth. Keyhole Radio is a unique and powerful RF planning interface, accessed by loading a Keyhole Markup Language (KML) overlay in Google earth.
[ Hits: 1973 | Votes: 8 | Rating: 5.88 ]
- Solar Powered 12V Ham Radio Station
- This article shows how to power an amateur radio station from solar power using four kits that have been designed to work together in a modular way, each kit provides a unique function.
[ Hits: 552 | Votes: 1 | Rating: 10 ]
- A Compact 600W Broadband HF Power Amplifier
- A 600W 1.8 MHz to 54 MHz power linear amplifier made using rugged MRF300 transistors featuring output power between 580W and 750W depending on band, power supply: 48V, 18A typical, 20A max
[ Hits: 596 | Votes: 6 | Rating: 7.33 ]
- Harris Platinum Solid State Power Amplifier for 50 or 70 MHz
- Harris Platinum I Solid State Channel 2, and 3 TV Amplifier Modules for use, on 50 or 70 MHz
[ Hits: 319 | Votes: 2 | Rating: 10 ]
- A cool KW linear amplifier for 50 MHz
- Larcan LoLo 1KW 6m Amplifier, is a cool power amplifier for 50 MHz thanks to the digital television revolution.
[ Hits: 577 | Votes: 0 | Rating: 0 ]
- Back-up Power For Your Home Station
- One way to keep your home station on the air during a power outage.
[ Hits: 417 | Votes: 0 | Rating: 0 ]
- DIY LiFePO4 Battery power for Amateur Radio portable operations
- An interesting article about a homemade LiFePO4 battery pack for ham radio operations, a 10Ah LiFePO4 based on Headway 38120 Cells
[ Hits: 277 | Votes: 0 | Rating: 0 ]
- Compact GO-BOX with a Raspberry Pi4, Elecraft KX2 and Kenwood TH-D74
- 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.
[ Hits: 321 | Votes: 2 | Rating: 9.5 ]
- The Micro20 III Pocket Size SSB RTX for 20m
- DK7IH QRP transceiver for 14 MHz. This small and compact home made transceiver with a max power output of 5W, the VFO module is based on the clock oscillator chip Si5351A by Silicon Labs ATmega168 and OLED 1306
[ Hits: 249 | Votes: 3 | Rating: 10 ]
- Cross Band Repeaters
- Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
[ Hits: 206 | Votes: 0 | Rating: 0 ]
- Anderson Powerpole Polarity Checker Project
- A polarity checker is a very useful item to have around the shack and in a go-kit. This project, inspired by a QST article on powerpole connector protection illustrate how to build a polarity checker.
[ Hits: 168 | Votes: 0 | Rating: 0 ]
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