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Antennas : Antenna Calculators

• Small Transmitting Loop Antenna Calculator - A free online calculator for making all of the calculations required to design and build small transmitting loop antennas, also known as magnetic loops by 66pacific.com
  [ Hits: 5083 | Votes: 19 | Rating: 7.05 ]

• RF Choke Coil - Made Easy - In this article K3DAV show a very simple way to make an RF choke coil that will remove your RF feedback troubles
  [ Hits: 1266 | Votes: 6 | Rating: 5.83 ]

• VHF/UHF Yagi Antenna Design  ^pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
  [ Hits: 147433 | Votes: 1105 | Rating: 6.95 ]

• Citizen Weather Observer Program - A private-public partnership with three main goals to collect weather data contributed by citizens; to make these data available for weather services and homeland security; and to provide feedback to the data contributors so that they have the tools to check and improve their data quality
  [ Hits: 449 | Votes: 2 | Rating: 7.5 ]

• RF Cool Tools Real Time Design - RFCoolTools RLC Filter Simulation, S-parameter Plotter, Filter Optimization,Broadband Impedance Match
  [ Hits: 3451 | Votes: 57 | Rating: 4.66 ]

• JVComm32 - The multi-purpose commercial FAX, RTTY / SYNOP / NAVTEX and SSTV program for Windows 95, 98, 2000, NT 4.0, XP, Vista and Windows 7
  [ Hits: 7114 | Votes: 17 | Rating: 6.8 ]

• Ham Secretary - The program serves to assist in a ham-radio activities secretarial with his hobby , such as Printing QSL cards or print labels directly from the program , printing envelopes and mailing envelopes for the feedback you send direct QSL cards, download address for sending cards direct from QRZ.COM or for any station. Checking whether for the QSO and his country is present QSL bureau.
  [ Hits: 151 | Votes: 0 | Rating: 0 ]

• Axis Spectrum Analyzer - Axis Spectrum Analyzer allows you to record audio along with sincronized 31 band spectrum analyzer readings from any audio source to be inputed into Macromedia Flash movies in an easy to integrate way. The software can also be used to display real-time audio with customized visuals on video devices such as projectors, tvs,etc.
  [ Hits: 11256 | Votes: 5 | Rating: 4.2 ]

• Negative feedback output circuit - Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.
  [ Hits: 1105 | Votes: 1 | Rating: 10 ]

• Mini Satellite-Antenna Rotator Mk2 - Design and construction of a mini satellite-antenna rotator. It used some small DC motors and a novel combination of 3D magnetometers and accelerometers to provide absolute azimuth and elevation feedback.
  [ Hits: 492 | Votes: 3 | Rating: 4 ]

• KI7NEW Morse Code Trainer - The Trainer is based on a simple modular built STEM/game platform, plus newly developed interactive software,it contains six training routines, easy to advance, and consists of various learning aids. You select them from a menu. Feedback for menu selection is given audibly and through an LED display and serial monitor.
  [ Hits: 119 | Votes: 0 | Rating: 0 ]

• Online Calculators for Radio & Electronic Design - Online calculators for toroid coil, air-core coil inductance, XL, XC, and more.
  [ Hits: 1924 | Votes: 3 | Rating: 9.33 ]

• ICOM IC-775 FIlter Installation - Inrad Roofing Filter installation instruction, The IC-775 Roofing Filter Mod consists of a 6 pole, 5 kHz wide filter followed by a high dynamic range, feedback amplifier.
  [ Hits: 61 | Votes: 0 | Rating: 0 ]

• Kenwood Microphone MC60A Modification - The Kenwood MC60A with preamp, suffers from RF feedback, a search on the web reveals the extent of the problem. This document explain how to fix this problem.
  [ Hits: 394 | Votes: 0 | Rating: 0 ]

• A secure power supply - Dchematics and photos of a secure power supply (short-cut, Rf feedback, high voltage etc.) by iz7ath
  [ Hits: 7288 | Votes: 3 | Rating: 8.67 ]

• General Coverage Receiver - This is a compact three transistor regenerative general coverage receiver with fixed feedback
  [ Hits: 2067 | Votes: 2 | Rating: 5 ]
• General Coverage Receiver LW MW SW - This is a compact three transistor regenerative general coverage receiver with fixed feedback. The sensitivity and selectivity is relative good, especially on the LF and MW bands, as can be expected with this simple design.
  [ Hits: 197 | Votes: 0 | Rating: 0 ]