filter rf

filter rf

Pages: [prev] 1 2 3 4

• Multi-Band End-Fed Antenna Design for Limited Space  ^new - This document details the construction of a multi-band end-fed antenna, suitable for situations with limited space for larger antennas. The design utilizes a 1:49 to 1:60 impedance transformer to match a half-wave wire antenna fed at one end. Compared to a traditional dipole, this antenna resembles a highly unbalanced Windom antenna with one very long leg and a virtual short leg. The design eliminates the need for radials but relies on the coax cable shield for grounding. The document recommends using at least 10 meters of coax and installing a common mode filter at the entry point to the shack for improved performance.
  [ Hits: 76 | Votes: 0 | Rating: 0 ]

• To transform ot not to transform - Feed Lines - Transmission lines have many uses other than simply transferring RF power from one point to another. Impedance matching, baluns and filters are probable the most common of these.
  [ Hits: 137 | Votes: 0 | Rating: 0 ]

• Coax Stubs for 20m and 40m - When operating contest in a multi transceiver environment interferences between the 40m and 20m are guaranteed. An easy and inexpensive way to reduce interferences is to add coax stub filters
  [ Hits: 243 | Votes: 4 | Rating: 8.5 ]

• World of Receivers and Transmitters - A searchable database of online websdr receivers, lists OpenWebRX, KiWi SDR and WebSDR from all over the world, providing a web interface to search and filter links to websdr
  [ Hits: 307 | Votes: 3 | Rating: 4 ]

• 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 ]

• FT2000 Roofing Filter Installation - A step by step guide to install the NS Roofing filter into the Yaesu FT-2000
  [ Hits: 110 | Votes: 0 | Rating: 0 ]

• Ham Goodies - Amateur Radio goodies for not only the Shack, but also a range of outdoor/portable kit. Ferrite toroids, RTL SDR, Un-uns and Baluns for antennas and RF Filters. Based in the UK.
  [ Hits: 145 | Votes: 0 | Rating: 0 ]

• WinRFCalc Free Windows RF Calculator - A multi tool Windows program that has been designed to offer the EMC RF and Radio Engineer a large variety of tools for Attenuation calculation, VSWR analysis, FIR Filter calculations, EMC system configuration, Radar testing , RF Filter calculation and much more without the need of a live internet connection.
  [ Hits: 211 | Votes: 0 | Rating: 0 ]

• A600 Power Amplifier Project - This is a power amplifier project for a RF 600W 1.8 MHz to 70 MHz linear amplifier including a Low Pass Filter. Projects includes schematics, pictures, PCD design, fans details, note on PA ferrite chokes and assembling instructions
  [ Hits: 100 | Votes: 0 | Rating: 0 ]

• 20m 30m 40m Bandpass Filters - Homemade LC Bandpass Filters for 20M, 30M, 40M In multi-station environments like special events, field day, portable operating, is very important to protect receivers from excessively strong signals. Bandpass filters help to protect your transceivers.
  [ Hits: 382 | Votes: 1 | Rating: 10 ]
• Band Pass Filters for HF Transceivers - If your multiple transceiver station is suffering of intrastation interference, this handy and inexpensive band pass filters and help you. QST article Sept 1988
  [ Hits: 128 | Votes: 0 | Rating: 0 ]
• Enhancing Frontend Performance with Optimized Band Pass Filters - This article explores the nuanced design challenges of Band Pass Filters (BPF) in radio receivers, balancing low insertion loss, high stop band rejection, and narrow bandwidth. The focus is on the "Series-Trap, Shunt-C" topology, resonator count impact, and meticulous layout design for superior stop band performance across various frequency bands
  [ Hits: 82 | Votes: 0 | Rating: 0 ]

• Mains RF Filter - If RF noise threatens to take your hobby away, this could be probably a good solution to reduce or even eliminate RF Noise.
  [ Hits: 125 | Votes: 0 | Rating: 0 ]
• DIY EMC/RFI Mains Filter for a Clean Shack - Utilizing snap-on ferrite cores and practical insights, the author enhances their shack's cleanliness against electromagnetic interference. With meticulous experimentation and installation, they improve noise levels across HF bands, reflecting on the effectiveness of their filter in minimizing common-mode disturbances. Updates underscore ongoing refinement and cautionary advice for optimal filtering and radio reception amid changing RF environments.
  [ Hits: 153 | Votes: 1 | Rating: 10 ]

• A Simple Spectrum Analyzer - This is a swept-filter spectrum analyzer. Basically, RF and swept oscillator signals are fed to a mixer and the output of the mixer is passed through a highly selective crystal filter.
  [ Hits: 121 | Votes: 0 | Rating: 0 ]

Pages: [prev] 1 2 3 4