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Internet and Radio : Classifieds
  • HamFM Classifieds - 100% free eBay like classified listings for any ham radio operator. Search filters for distance and item category.
    [ Hits: 179 | Votes: 0 | Rating: 0 ]
Manufacturers : Amplifiers
  • 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: 511 | Votes: 1 | Rating: 10 ]
Manufacturers : QRP Kits
  • HF Projects Kits - Provide service, quality home construction projects, travel antennas, masts and bases, hf and vhf amplifiers, low pass filters and z-match tuners
    [ Hits: 748 | Votes: 0 | Rating: 0 ]
Operating Modes : HF Operations
  • HF Operations: The Difference with HF - A complete guide on using the HF amateur radio bands, and the differences with VHF, using filters, influence of solar weather, the split mode and phonetic alphabets.
    [ Hits: 335 | Votes: 2 | Rating: 8.5 ]
Radio Equipment : HF Transceivers : Icom IC-706 Radio Equipment : HF Transceivers : Yaesu FT-847
  • FT-847 Roofing Filter Mod - The mod requires an INRAD 45,705 MHz Crystal Roofing filter and the IC-765 add-in Board
    [ Hits: 403 | Votes: 1 | Rating: 1 ]
Radio Equipment : Receivers : Icom IC-R20
  • Icom IC-R20 discriminator mod - An illustrated modification for the Icom IC-R20 receiver to locate and use the unfiltered audio.
    [ Hits: 666 | Votes: 2 | Rating: 5 ]
Software : Android
  • SOTA Spotter - SOTA Spotter is an application written for devices running Android™ versions 4.0.3 and above (like smartphones and tablets). It can send spots, filter and trigger notifications for incoming spots.
    [ Hits: 598 | Votes: 3 | Rating: 9.67 ]
Software : Android : DX Cluster
  • DX Cluster for Android - Get live DX spots on your Android device. DX Cluster for android is a real time DX spots client, show different bands and mode filters, a country filter for spotter or the spots, prefix or call sign alarms. Download from Wolphi Solutions
    [ Hits: 993 | Votes: 2 | Rating: 5 ]
Software : Circuit Design
  • mini Ring-Core-Calculator - Calculate windings on ferrite cores - The program can be used to calculate inductors (coils) and their number of turns on ferrite cores, ferrite shells and air coils. These can be used for baluns, Ununs, bandpass filters, low pass filters, resonant circuits, and more. The technical specifications of the cores are already integrated in the program. Application is free and runs on Windows 32 bit versions only. To make it run on Windows 10 64 bit need to be unzipped in a single folder.
    [ Hits: 390 | Votes: 1 | Rating: 1 ]
Software : DX Cluster
  • HamAlert - HamAlert let you receive Push,SMS,Email notifications for Cluster,RBN,SOTAwatch spots, with customizable filtering based on many criteria including DXCC, SOTA and WWFF references, CQ zones
    [ Hits: 361 | Votes: 3 | Rating: 10 ]
Software : Grid Bearing and Maps
  • GridMapper WG7J - Upload an ADIF fiel and plot all worked grids in an online map. Support filtering by band, year and can export the output directly into a google map, or a google earth KML file
    [ Hits: 361 | Votes: 6 | Rating: 6.83 ]
Software : Software Defined Radio
  • Zeus Radio - Software Defined Radio - Zeus Radio program is designed specifically for the ZS-1 transceiver and supports all the basic functions (RIT, XIT, SPLIT, Noise Reduction, Auto Notch Filter, etc.) in order to work in the broadcast brought only pleasure. Zeus Radio works also with Hermes, Anan, Afedri, Red Pitaya, HiQSDR, Odyssey, Extio, RTL-SDR, Peaberry, Winradio, SDR-IQ, Afedri
    [ Hits: 505 | Votes: 1 | Rating: 8 ]
Technical Reference : Duplexers
  • VHF-UHF Diplexer - Diplexer is a passive device, a special filter circuit that seperates 2 different bands, not to be confused with the duplexer that usually separate 2 different frequencies on the same band.
    [ Hits: 1135 | Votes: 2 | Rating: 5 ]
Technical Reference : HF Radios
  • PT40 7 MHz Transceiver by AA3SJ - Home made 40 meter transceiver project. The receiver is a Progressive Receiver with a few modifications. The Transmitter is a modified MFJ Cub circuit. Includes schematic and circuit diagrams for Receive Input Filter, 3-Pole 500 Hz Cohn Filter and 7 MHz Double Tuned Bandpass Filter
    [ Hits: 162 | Votes: 0 | Rating: 0 ]
Technical Reference : Microphones
  • SSB Microphone Filter - Build this circuit to tailor your microphone response to different band conditions. A project by KG4JJH
    [ Hits: 465 | Votes: 1 | Rating: 1 ]
Technical Reference : Raspberry Pi Technical Reference : Spectrum Analyzers
  • Tektronix Compatible Tracking Generator - A spectrum analyzer is always an usefull amateur radio test equipment that should be present in a radio shack. Hams can use it for testing frequency response of filters, amplifiers, and other two-port RF devices. This article illustrate a tracking generator compatible with any spectrum analyzer in the Tektronix 490- and 2750-series lineups
    [ Hits: 188 | Votes: 0 | Rating: 0 ]
Technical Reference : TVI Filters
  • TVI Filters for 2m and 70cm - The TVI filters described in this page worked very well in curing a TVI problem on 2m abd 70cm
    [ Hits: 371 | Votes: 1 | Rating: 10 ]
Technical Reference : Test Equipment : RF Sweep Generator
  • A Heterodyne Sweep Generator - A Simple unit which can be used to plot the Response of IF Filters and IF Channels
    [ Hits: 823 | Votes: 4 | Rating: 4 ]

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