cheap

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cheap

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Antennas : 2M
  • A cheap dual band ground plane antenna - This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT
    [ Hits: 2957 | Votes: 2 | Rating: 6.00 ]
  • 100 grams VHF yagi - A portable VHF home-made Yagi-Uda antenna, that is extremely easy to build and very cheap. Moreover this antenna, while dismounted is just 1 meter long, and the total weight is just 100 grams.
    [ Hits: 1729 | Votes: 5 | Rating: 7.00 ]
Antennas : 4M
  • 4m Slim Jim Antenna - This 4m Slim Jim Antenna is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. An SWR of 1:1 is obtainable across the 4m ham radio FM band with a simple adjustment.
    [ Hits: 1545 | Votes: 2 | Rating: 5.50 ]
Antennas : Portable Antennas : Skeleton Slot
  • HF Skeleton Slot - An antenna system with a difference. It is a cheap and simple to make antenna, can be built with three bamboo spreaders and wire
    [ Hits: 653 | Votes: 1 | Rating: 9.00 ]
Antennas : VHF UHF
  • Rabbit-Ears Dipole Antenna - This handy and cheap portable dipole can be folded and backpacked, carried in use, and adjusted to a very wide range of frequencies.
    [ Hits: 549 | Votes: 0 | Rating: 0.00 ]
Antennas : WiFi
  • Cookie Cantenna Wi-Fi - Make a cheap, portable, high performance (15-18 db) directional antenna out of commonly available parts that can be purchased in most grocery and hardware stores.
    [ Hits: 5818 | Votes: 3 | Rating: 10.00 ]
Ham Radio : Blogs : Special Interest
  • rtl-sdr.com A blog about RTL-SDR - RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset. This is a blog about rtl-sdr, software defined radio and their developments and applications.
    [ Hits: 1384 | Votes: 6 | Rating: 6.75 ]
Software : Software Defined Radio
  • OsmocomSDR rtl-sdr - The RTL-SDR software by Osmocom, allow DVB-T dongles based on the Realtek RTL2832U to be used as a cheap SDR.
    [ Hits: 2652 | Votes: 5 | Rating: 7.20 ]
Technical Reference : Amplifiers : RF Amplifiers Theory
  • Using cheap tetrodes in amplifiers - This article is written to dispel some of the misconceptions and misunderstandings about some of the tetrode based linear amplifiers, which are currently available on the amateur market.
    [ Hits: 271 | Votes: 1 | Rating: 1.00 ]
Technical Reference : Amplifiers : UHF Amplifiers
  • A 100 Watt UHF Power Amplifier - Build a 100 Watt power amplifier using cheap, readily available junk radios
    [ Hits: 584 | Votes: 1 | Rating: 1.00 ]
Technical Reference : Coax Cables and Connectors
  • Connectors - There are scores of RF connector types, ranging from the \"cheap and cheerful\" to the extremely expensive types intended for use in professional and military applications.
    [ Hits: 365 | Votes: 0 | Rating: 0.00 ]
  • RF Coaxial Switch - An interesting rf coaxial switch project capable of handling 800-1500 W. This is a cheap home made RF coaxial switch in use by PA0FRI
    [ Hits: 259 | Votes: 1 | Rating: 5.00 ]
Technical Reference : Filters
  • Cheap Crystal Filter - An economical way of building an SSB filter. The circuit is for a filter with a 6 DB band width of roughly 2.2 KHz.
    [ Hits: 355 | 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: 458 | Votes: 1 | Rating: 6.00 ]
Technical Reference : QRP Projects : QRP CW Transceiver
  • 40 CW QRP Transmitter - Here is a easy to build and cheap CW transmitter using 40 m cristals. Power output is approximately 6 Watts for a supply voltage of 13.8 VDC
    [ Hits: 863 | Votes: 2 | Rating: 6.50 ]
Technical Reference : Software Defined Radio : RTLSDR
  • RTLSDR.com - This Blog covers some of the latest developments and projects involving RTLSDR Dongles a cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset.
    [ Hits: 341 | Votes: 1 | Rating: 10.00 ]
  • RTL-SDR Tutorial: Cheap AIS Ship Tracking - How to cheaply track ships using AIS and a cheap $20 software radio.
    [ Hits: 1462 | Votes: 2 | Rating: 3.00 ]
Technical Reference : Sound Card Radio Interfacing
  • CI-V Interface Controller - Acircuit that will please many, a cheap alternative to expensive TN,firstly then we look at the CI-V type port to connect to the interface.
    [ Hits: 312 | Votes: 1 | Rating: 7.00 ]
Technical Reference : Test Equipment : Multimeter
  • Build a Test Meter - This article include a circuit that allows a cheap 0-1mA meter to be used as a micro-ammeter or a milli-voltmeter
    [ Hits: 173 | Votes: 0 | Rating: 0.00 ]
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