low power

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Antennas : Indoor
  • DCTL Portable Antenna - A Low Power Indoor Portable HF Antenna by N5ESE
    [ Hits: 320 | Votes: 0 | Rating: 0.00 ]
Antennas : Magnetic Loop
  • Magnetic Loop Antenna Calculator - Free windows program to calculate magnetic loop antenna.This small loop antenna calculator allow to determine capacitance and voltage based on Loop circumference, desired resonant frequency, conductor diameter and the operating power
    [ Hits: 2242 | Votes: 14 | Rating: 6.71 ]
Antennas : VHF UHF
  • Cheap HDTV Antenna  updated - A cheap and easy HDTV Yagi Antenna that also work well with the UHF low-power analog and translator stations
    [ Hits: 429 | Votes: 1 | Rating: 7.00 ]
Ham Radio : Clubs : North America : USA : Alaska
  • Alaska QRP Club - Official web site of the Alaska QRP Club The AK/QRP Club is dedicated to the enjoyment of low power Amateur Radio operations.
    [ Hits: 191 | Votes: 0 | Rating: 0.00 ]
Operating Modes : QRP
  • Using lowest possible power - Operating QRP at the lowest possible power during contest article by PA1B
    [ Hits: 243 | Votes: 0 | Rating: 0.00 ]
Operating Modes : QRP : Clubs
  • GQRP Club - A non profit organisation run entirely by volunteers to promote Low Power Radio.
    [ Hits: 157 | Votes: 0 | Rating: 0.00 ]
Radio Equipment : HF Amplifiers : Ameritron AL-811
  • Repairing the Ameritron 811 linear - Article by M0DGQ about reparing an Amaritron 811 linear amplifier giving a low power output and varying swr readings
    [ Hits: 575 | Votes: 3 | Rating: 8.33 ]
Radio Equipment : HF Transceivers : Icom IC-7000 Shortwave Radio : Broadcasters
  • Station QRP - Station QRP is a free low power pioneer shortwave radio station on 6.925 kHz AM
    [ Hits: 149 | Votes: 2 | Rating: 9.50 ]
Software : Circuit Design
  • EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications
    [ Hits: 283 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Amplifiers : HF Amplifiers
  • 811 Linear Amplifier project - A lower power desktop linear with integrated 120vac power supply. This, very compact, dual 811 version will deliver about 300 watts output. Covers all bands including WARC bands.
    [ Hits: 1247 | Votes: 1 | Rating: 10.00 ]
  • Home Made 813 Amp - An home made RF Amplifier project that allows near full power output from 813 tubes
    [ Hits: 1163 | Votes: 2 | Rating: 6.00 ]
Technical Reference : Filters
  • A home-built low-pass filter for 4m - This unit uses four capacitors, only two of which are variables, and a single tapped coil. It is built in a die-cast box, and has been tested up to 80W input power on 70MHz by G4CJZ
    [ Hits: 249 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Keyers
  • ZL2PD CMOS Keyer - Two cheap CMOS ICs and a few transistors was all that was required to rebuild an elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer.
    [ Hits: 432 | Votes: 1 | Rating: 6.00 ]
Technical Reference : Power Supply
  • A low cost 4 Amp power supply - A low cost, compact 4 Ampere regulated power supply
    [ Hits: 505 | Votes: 1 | Rating: 8.00 ]
  • Peth-9910 10A Power Supply - A project of a linear regulated for low noise power supply 16v, 10A
    [ Hits: 433 | Votes: 1 | Rating: 3.00 ]
  • 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: 433 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Radio Frequency Interference
  • Locating Power Line Noise - RF interference from power lines is caused by arcing as high voltage electricity bridges a gap to a lower ground potential on the power pole. Corroded or loose connections, cracked insulators almost all of the hardware on a power pole can be the source of arcing.
    [ Hits: 190 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Raspberry Pi
  • Open Repeater - The Raspberry Pi Repeater Controller Project goal is to develop a low cost, low power, but feature rich duplex repeater controller suitable for setting up a temporary or emergency repeater systems with radios that can be run on portable power
    [ Hits: 630 | Votes: 1 | Rating: 10.00 ]
Technical Reference : SWR Meters
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