tra pass

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tra pass

53 links

Antennas : Coils
  • Coil Winding Tips - Tips on winding wire coils used as inductive loads, traps, band-pass filters, are implemented in a number of amateur radio projects especially antenna projects
    [ Hits: 875 | Votes: 7 | Rating: 6 ]
Antennas : Slim Jim
  • 2m Slim-Jim Aerial using Ladder-Line - The Slim-Jim is a bit of a classic - building one is almost certainly a rite of passage and you will be glad that you did: It is easy to make, fairly easy to tune and rolls-up for transportation.
    [ Hits: 184 | Votes: 2 | Rating: 10 ]
Antennas : Tuners
  • A Homebrew Z-Match Transmatch - A home made antenna tuner based on the W6JJZ basic concept that ,atches balanced loads without the use of lossy baluns, can provide band-pass filtering and harmonic attenuation.
    [ Hits: 1099 | Votes: 0 | Rating: 0 ]
  • Semi-automatic antenna tuner project - Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
    [ Hits: 291 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : California
  • San Diego Radio Emergency Communications - San Diego REMCOM volunteer group specializes in serving the county and hospitals during drills and disasters. All members are FCC licensed radio responders, certified in ICS training, have passed security background checks with signed confidentiality statements.
    [ Hits: 414 | Votes: 0 | Rating: 0 ]
Ham Radio : Exams : Study Guides
  • The No-Nonsense Extra Class License Study Guide - The No-Nonsense Extra Class License Study Guide (for tests given between July 2016 and June 2020) This is the study guide you want if you want to pass the Extra Class exam
    [ Hits: 409 | Votes: 0 | Rating: 0 ]
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 Aids : Traffic Handling
  • International Third-Party Traffic - Third-Party Operating Agreements. Occasionally, DX stations may ask you to pass a third-party message to a friend or relative in the States. This is all right as long as the US has signed an official third-party traffic agreement with that particular country
    [ Hits: 349 | Votes: 0 | Rating: 0 ]
Operating Modes : Satellites
  • Heavens Above - Live realtime satellite tracking system show current status of amateur radio satellites, ISS tracking is also provided by showing ISS Visible Passes based on your own location. This web site show the International space station live position and can be used as an iss tracker app to determine future satellite and ISS transit over your location.
    [ Hits: 2275 | Votes: 7 | Rating: 7.57 ]
  • How Satellite Doppler Tracking Works - The Doppler Effect allows the distance between a satellite transmitting from space and a radio receiver on the ground to be measured by observing how the frequency received from the satellite transmitter changes as the satellite approaches, passes overhead, and moves away.
    [ Hits: 424 | Votes: 3 | Rating: 4.67 ]
Radio Equipment : VHF-UHF Handhelds : Baofeng UV-3R
  • Baofeng LPF mod by G0FTD - A modification of the UV3R Baofeng handheld transceiver to improve the built in low pass filter
    [ Hits: 404 | Votes: 0 | Rating: 0 ]
Shopping and Services : Electronic Components Shopping and Services : Regional : Australia
  • MiniKits.com.au - Australia's largest range of Electronic Kits & Components In Stock for the Radio Experimenter, ATV, microwaves, HF Band pass filters
    [ Hits: 836 | Votes: 0 | Rating: 0 ]
Software : Android
  • ISS Detector - Free Android app that tracks and alerts on ISS passes with specified criteria.
    [ Hits: 677 | Votes: 2 | Rating: 5.5 ]
Software : Audio Recorders
  • Pass Recorder - Pass Recorder is a small application that records audio from satellite passes based on tracking data it receives from the commonly used SatPC32 application
    [ Hits: 186 | Votes: 0 | Rating: 0 ]
Technical Reference : Filters
  • Receiver Band-Pass Filters - Third-order Cauer filters can boost performance of multi-transmitter, multi-operator contest stations to the next level. The filters are practical and you don’t need expensive test equipment to align them.
    [ Hits: 885 | Votes: 1 | Rating: 5 ]
  • 432 144 MHz Notch Filter - Combined 432 MHz High-Pass - 144 MHz Notch Filter By Bertrand Zauhar, VE2ZAZ
    [ Hits: 513 | Votes: 1 | Rating: 1 ]
  • Lowpass filter for 30m - 30m lowpass filter for the Softrock Ensemble RXTX tranceiver.
    [ Hits: 351 | Votes: 0 | Rating: 0 ]
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 : TVI Filters

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