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Antennas : 4M
  • The 50 MHz DK7ZB Quadlong - The Quadlong antenna for the six meter band. This antenna feature a total gain of 6,4 dBd, F/B 21 dB and is also available in 70MHz version. Includes detailed pictures and plot diagrams.
    [ Hits: 1440 | Votes: 27 | Rating: 9.04 ]
Antennas : 6M : 6 meter Yagi Antennas
  • F5DQK Vinecon 6N4 - A dual band antenna for 50Mhz and 70Mhz with lots of pictures and diagrams by F5DQK
    [ Hits: 1574 | Votes: 3 | Rating: 3 ]
Antennas : Baluns Antennas : Baluns : 1 to 1 Balun
  • Simple HF Baluns for 50/75 ohm coax - Show diagrams, winding methods and tables of some 1:1 and 4:1 baluns for 1.8 - 30 MHz suitable for use up to 200W (400W peak) on systems using 50 or 75 ohm coaxial cable input where SWR should not exceed 1.6:1.
    [ Hits: 15202 | Votes: 25 | Rating: 4.32 ]
Antennas : Tuners
  • A Portable Antenna Matching Unit - A small HF antenna tuner project for qrp operations. Includes circuit diagrams pictures and test results by GW4ALG
    [ Hits: 15342 | Votes: 7 | Rating: 5.14 ]
Antique Radios : Schematics
  • Atwater Kent Home Page - This is a "techie" site, dedicated to presenting service manuals, parts lists, schematic diagrams and other information of value to restorers and technicians who try to keep these radios working
    [ Hits: 1207 | Votes: 2 | Rating: 7.5 ]
  • Canadian Antique Radios Schematics Diagrams Service - We specialize in canadian antique radio schematics for vintage tube radios made in canada. we carry lots of factory electronic circuit schematic diagrams as well as all rcc / radio college of canada service data 1920's - 70's.
    [ Hits: 1612 | Votes: 4 | Rating: 6.25 ]
Ham Radio : Clubs : Europe : Denmark
  • SkalaDesign - A danish only scale diagrams designer, usefull to draw front panels and dial scale knobs, windows freeware.
    [ Hits: 1124 | Votes: 4 | Rating: 6.75 ]
Internet and Radio : Other Resources
  • HamRadioEngineering.com - Amateur Radio site including Curcuit Diagrams, Antenna Construction, Radio Repairs, and serious fun. The Ham Radio Website for Ham Radio and Electrical Engineers, with mods, circuits to build, manuals and projects
    [ Hits: 312 | Votes: 0 | Rating: 0 ]
Manufacturers : Publications
  • Radio Bygoned - From the Publishers of EPE, this specialist niche publication is of interest to vintage radio enthusiasts, offering step-by-step rebuilds of selected receivers and helpful ideas and advice. Published every other month, each issue contains articles on radio restoration and repairs, histories, circuit diagrams, nostalgic memories and adverts by specialists.
    [ Hits: 806 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-817 Radio Equipment : HF Transceivers : Yaesu FT-847 Technical Reference : Amplifiers : HF Amplifiers
  • Homebrew HF Amp with 3CX3000F7 - Grounded grid triode HF linear amplifier with pictures and schematics diagrams by W2DTC. The amp design was for 160 80 40 and 20 meters
    [ Hits: 3274 | Votes: 9 | Rating: 6.33 ]
Technical Reference : Amplifiers : RF Amplifiers Theory
  • Power amplifier schematics - A collection of several power amplifier circuit diagrams and articles in PDF
    [ Hits: 443 | Votes: 1 | Rating: 1 ]
Technical Reference : DTMF
  • DTMF Keypad project - DTMF Keypad for radios without one. A project with picture and schematic diagrams to homemade a DTMF keppad
    [ Hits: 381 | Votes: 1 | Rating: 10 ]
Technical Reference : HF Radios
  • DRAKE TR7 Downloads - Circuit diagrams drake tr7, Schaltbilder Drake Tr7, antenna tuners, baluns, and home brew power supplies, dual tone ssb test generator, zweiton ssb test generator, zweiton testgenerator, dual tone test generator by DK4DDS
    [ Hits: 1756 | Votes: 4 | Rating: 7.25 ]
  • Kenwood Schematics - Kenwood schematics diagrams in high resolution format, includes Kenwood TS-830S , TS-820S and TS-520S
    [ Hits: 629 | Votes: 2 | Rating: 9 ]
Technical Reference : QRP Projects
  • Portable PSK - Integrated PSK station for 80 & 20 meters without using a PC Pictures and diagrams by N2APB
    [ Hits: 579 | Votes: 0 | Rating: 0 ]
Technical Reference : RF Design
  • RF Mixers - An introduction to RF mixes and their main characteristics, article with diagrams and illustrations by VA3IUL
    [ Hits: 484 | Votes: 1 | Rating: 9 ]
Technical Reference : Receivers : Crystal radio
  • Crystal Radio Circuits - Collection of several Crystal Radio receiver circuits with schematics diagrams and pictures
    [ Hits: 636 | Votes: 1 | Rating: 10 ]

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