high power

high power

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• QRO No-Tuner Multiband Dipole - Construction details of a multiband dipole that can can operate at high power levels, and match its 50-ohm coax feedline without a tuner
  [ Hits: 1508 | Votes: 2 | Rating: 4.5 ]

• A High Performance RF Choke for the HF bands - Home brewing a high performance, high power common mode choke for HF bands
  [ Hits: 152 | Votes: 0 | Rating: 0 ]
• RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
  [ Hits: 86 | Votes: 0 | Rating: 0 ]

• Home made High Power Magnetic Loop Antennas - Magnetic Loop Antennas for The Radio Operator with Limited Space, a two part series of articles on how to construct a magnetic loop antenna, including directions on selecting high voltage tuning capacitor
  [ Hits: 896 | Votes: 0 | Rating: 0 ]

• A QRP Transmatch ATU - A home made Antenna Tuner made with a simple inductor and a few spare parts. Despite the title, the author succesfully tested this ATU with higher power inputs.
  [ Hits: 204 | Votes: 0 | Rating: 0 ]

• Pro Audio Engineering - High-quality products for broadcast and amateur radio. Kx33 Low-RFI AC Power Supply for HF Transceivers, Elecraft Heatsinks, Fair-Rite Mix 31 Ferrites
  [ Hits: 119 | 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: 331 | Votes: 0 | Rating: 0 ]

• VA6AM Contesting Accessories - Custom built high and low power power band pass Filters, low band triplexers, triplexers and diplexers
  [ Hits: 119 | Votes: 0 | Rating: 0 ]

• Kuhne Electronic - High quality microwaves components for professional and radioamateurs. Power Amplifiers, Low Noise Amplifiers, Es hail 2 Converter Transverter, Signal Sources, Passive Components and Accessoires
  [ Hits: 106 | 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: 131 | Votes: 0 | Rating: 0 ]

• 2.3GHz to 432MHz RX converter for FT-817 - A very small receiver converter that can be plugged to the backside of the battery powered portable transceiver FT817 from Yaesu. A high performance receiver for 2.3GHz amateur radio signal
  [ Hits: 223 | Votes: 3 | Rating: 1.67 ]

• Yaesu FT-891 - HF/50 MHz 100W All Mode Transceiver. The FT-891 provides stable 100 W (25 W AM) high power output
  [ Hits: 435 | Votes: 2 | Rating: 9 ]

• Yaesu FT-7800R - The FT-7800R provides 50 Watts of power on the 144 Mhz band, and 40 Watts on the 430 MHz, and is designed for simplicity of operation along with high performance in the receiver section.
  [ Hits: 203 | Votes: 0 | Rating: 0 ]

• 600W LDMOS Power Amplifier - A comeplete home made 600W LDMOS RF power amplifier. Settings can be made on a 7-inch touch screen, and on this screen you can see a lot of useful information during operation, such as output power, temperature, SWR, and so on. The power amplifier includes 2 MRF300 LDMOS FETs and several built-in sensors. The amplifier also contains several types of protection functions like too high current, too high swr, too high temperature, etc.
  [ Hits: 885 | Votes: 1 | Rating: 10 ]
• 20 W HF Power Amplifier - A HF power amplifier with a push-pull of AFT09MS015N. The (small-signal) gain of the amplifier is around 26 dB in the lower HF band and goes down to about 24 dB on the higher end and still around 21 dB at 50 MHz. Its input matching is relatively good at the lower HF and degrades above 10 MHz.
  [ Hits: 175 | Votes: 0 | Rating: 0 ]

• How to Design an RF Power Amplifier - This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.
  [ Hits: 674 | Votes: 1 | Rating: 10 ]

• Homebrew 1 Watt 2.4 GHz Power Amplifier - This will show you how to add a RF power amplifier to your Proxim Symphony for under $50. The cost is reduced by using the existing components on the Symphony, such as the PIN diode switch, and just inserting a higher power final amplifier. Increase the RF output power of your wireless network card to 1 Watt.
  [ Hits: 159 | Votes: 4 | Rating: 6.5 ]

• How to convert Server Power Supplies - The practice of converting computer server power supplies to make a very high quality high power supply at low cost is attractive. It doesn't normally require any modification to the supply but the hard part is figuring out how to trick them into turning on.
  [ Hits: 822 | Votes: 0 | Rating: 0 ]

• 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: 207 | Votes: 0 | Rating: 0 ]

• A Modern Directional Power/SWR Meter - Every ham needs an RF power meter. Here is a high performance unit to build at home.
  [ Hits: 1564 | Votes: 2 | Rating: 5.5 ]

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