hf power

149 links - and 5 categories

BalUn for Delta-loop & Quad-loop antennas - This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.
[ Hits: 286 | Votes: 1 | Rating: 9 ]

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 ]

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 ]

R3KBO EB104.ru Amateur Radio Products - R3KBO is an amateur radio club producing and developing amateur radio kits and assembled products including HF VHF Power Amplifiers or RF Power Kits and amplifier parts, low pass filfers, band pass filters, sourge protections, splitters and combiners, antenna switches
[ Hits: 513 | Votes: 1 | Rating: 10 ]

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: 399 | Votes: 4 | Rating: 7.5 ]

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: 501 | Votes: 0 | Rating: 0 ]

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: 409 | 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 ]

M0VKK VHF UHF Liear Amp - A combined 1KW VHF, 500W UHF linear power amplifier homebrewed by M0VKK
[ Hits: 289 | Votes: 0 | Rating: 0 ]

Stone Creek Special 600 HF RF Amplifier - This is a Solid State Amplifier Project. It uses 4 MRF150 MosFet Power Transistors. The Power Supply Voltage is 50 VDC at 21.5 Amp. The max power available is 1,075 Watts. The Efficiency is about 65% +/- and runs Class AB Solid State.
[ Hits: 270 | Votes: 0 | Rating: 0 ]
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: 597 | Votes: 6 | Rating: 7.33 ]

432 MHz 100W RF Power Amplifier - This article describes the construction of a 100-Watt, 70 cm amateur band linear power amplifier. It is the result of a protracted period of experimentation during which I investigated a number of final amplifier stages from obsolete UHF FM 2-way radios.
[ Hits: 239 | Votes: 1 | Rating: 9 ]
100W UHF Linear Amplifier - This page details my building of a 100 Watt Power Amplifier for the 432 MHz Band based on two Motorola MRF646 transistors taking inspiration by Carlo Gnaccarini VK3PY, formerly VK3BRZ
[ Hits: 193 | Votes: 0 | Rating: 0 ]

VHF FM Power Amplifier - A 144MHz FM class C RF Power Amplifier based on a 2N6084 RF transistor, that can produce 50w output max
[ Hits: 518 | Votes: 2 | Rating: 4 ]

70cm Beacon - PLL synthesized 70cm CW beacon exciter. The exciter is built arround a slightly more advanced ADF-4351 single chip PLL synthesizer rather then (among amateurs) more popular Si-570 or Si-5351 integrated circuits. The exciter is capable of providing up to 250 mW of RF output power,
[ Hits: 130 | Votes: 1 | Rating: 10 ]

HF-MT Dummy Load by VK2KVV - A handy piece of test equipment useful for HF bands, can absorb a 200W modulated carrier for almost 2 minutes. It is housed in a tin and part filled with dry sand that helps in power dissipation
[ Hits: 735 | Votes: 0 | Rating: 0 ]

Experimental HF 6-band SSB transceiver - An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front panel backlight.
[ Hits: 709 | Votes: 14 | Rating: 9.86 ]

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 ]

70cm Mini Transverter - A low cost, low power microwave transverter so that you can operate easily on 70cm band even with a HF or VHF transceiver
[ Hits: 394 | Votes: 0 | Rating: 0 ]
Transverter for 50 70 28 MHz - This multiband transverter project features power output at 13,8V 50MHz 15W, 70MHz 10W, second harmonic <65dBc. Single N connector of antenna, suitable for a dual band Yagi. Article include Block Diagram for Dual Transverter and low pass filters
[ Hits: 153 | Votes: 1 | Rating: 10 ]