rf parts

rf parts

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• 4m Tall Vertical Dipole for 20m - Constructed in May 2008, this innovative 4m tall electrically full-size halfwave vertical dipole, tunable to multiple bands, offers HF coverage despite its space-saving design. Inspired by cost-effective DIY alternatives, the antenna design departs from conventional center-fed approaches, utilizing asymmetrical dimensions. Despite resonance challenges, the antenna's performance remains viable, boasting broad bandwidth and adaptability, as demonstrated through SWR measurements and EZNEC predictions.
  [ Hits: 93 | Votes: 0 | Rating: 0 ]

• A very efficient half size 40 meter Vertical Antenna - A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.
  [ Hits: 736 | Votes: 4 | Rating: 8.5 ]

• 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 ]

• QRPparts - Online NOS electronic parts shop for QRP-QRPp radio constructors, to vintage radio and electrical measuring equipment restaurators. Many Germanium diodes, transistors and RF parts, semiconductors.
  [ Hits: 247 | Votes: 1 | Rating: 10 ]

• Arduino Nano and si5351 Digital VFO/BFO - A kit Digital VFO with pre-soldered surface mount parts and burned-in firmware, a scratch build with Arduino Nano, C code with modifications, and a Silicon Labs si5351 PLL clock generator on a breakout board.
  [ Hits: 376 | Votes: 2 | Rating: 6 ]

• How to locate RFI - I have RFI, now what– Locating it. This article is the first of a three parts article, that covers the problem of locating the RFI source. Author make use of an SDR receiver to locate RFI emissions. Ai interesting RFI location process diagrams helps on following the various phases, permitting the discovery of almost 75% of the RFI issues.
  [ Hits: 195 | Votes: 2 | Rating: 10 ]

• Fldigi on the Cheap - An FLdigi computer interface from spare parts made with a mic modification
  [ Hits: 152 | Votes: 0 | Rating: 0 ]

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