transmission 1

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transmission 1

57 links

Antennas : 160M
  • Low band antennas for 80 and 160m  pop - Antennas for the Low Bands. Plans and pictures of 80m and 160m antennas, both for transmission and reception built by EI7BA
    [ Hits: 55516 | Votes: 33 | Rating: 6.12 ]
Antennas : Baluns : 4 to 1 balun Antennas : Feed Lines
  • Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
    [ Hits: 1272 | Votes: 0 | Rating: 0 ]
  • AA3RL Transmission Line Calculator - Excel spreasheet that calculate virtually every transmission line parameter that one may need. Include Length conversions, Reactance and Length of Stubs
    [ Hits: 5332 | Votes: 16 | Rating: 6.88 ]
  • Where Does the Power Go - An Energy Analysis at an Impedance Discontinuity in an RF Transmission Line
    [ Hits: 735 | Votes: 3 | Rating: 10 ]
Antennas : Theory Antennas : Tuners
  • The EZ-Tuner - The "EZ-Tuner" is a homebrew automatic legal-limit antenna tuner that covers all amateur HF bands from 160-10 meters. Using a T-network design and controlled by a BASIC Stamp BS2sx microcontroller, the EZ-Tuner will match at least a 16:1 VSWR for either unbalanced or balanced transmission lines.
    [ Hits: 5567 | Votes: 1 | Rating: 9 ]
FRS and GMRS
  • Transmission1 - Radio Resources for PMR 446, Scanning, Broadcast and CB Radio
    [ Hits: 2251 | Votes: 4 | Rating: 6 ]
Ham Radio : Clubs : Australia
  • Auckland ATV Group - The ATV User's Group is a subgroup of the Auckland VHF Group, Club call ZL1BQ, compromising of persons interested in the transmission and reception of Amateur Television
    [ Hits: 833 | Votes: 0 | Rating: 0 ]
Internet and Radio : Sounds
  • Sound samples of digital transmissions - Sound samples of the transmission modes recorded at 11025 samples per second, mono and the message in all of the samples is the same: "the quick brown fox jumps over the lazy dog 1234567890".
    [ Hits: 3220 | Votes: 8 | Rating: 8.75 ]
Operating Aids : History : Marconi Operating Modes : DSP
  • PSK63 - A super-fast PSK mode for RTTY Contesting, 100 wpm character transmission speed for contest exchanges and macro transmission versus RTTY at 60 wpm
    [ Hits: 1748 | Votes: 1 | Rating: 10 ]
  • Q15X25 - Q15X25 is a packet modem with a KISS/AX.25 interface designed for HF transmission of AX.25 packets and TCP/IP using Automatic Repeat reQuest (ARQ) and forward error correction (FEC).
    [ Hits: 704 | Votes: 1 | Rating: 1 ]
Radio Scanning : Regional : Europe
  • UK Scanner frequency database  pop - Large frequency database of uk counties, includes forums and reviews
    [ Hits: 32058 | Votes: 115 | Rating: 5.04 ]
Shortwave Radio : Numbers stations Software : Antenna analysis
  • Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.
    [ Hits: 1573 | Votes: 6 | Rating: 6.5 ]
Software : DSP
  • Voice Descramble - This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band.
    [ Hits: 5340 | Votes: 25 | Rating: 5.48 ]
Software : Multimode
  • HamComm 3.1 - DOS Freeware popular program for ham radio communications, supports reception and transmission of radio teletype RTTY, AMTOR ARQ/FEC, SITOR A/B, NAVTEX and Morse code (CW) signals. A decoder for SHIP and SYNOP reports from weather stations is also included. This program is discontinued and unsupported. Originally developped by Schroeder DL5YEC
    [ Hits: 25198 | Votes: 23 | Rating: 6 ]
Software : Utilities
  • Voice descrambler - This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band. Use it only if legally permitted in your country. I assume no responsabilities deriving from its use. Standard disclaimer applies
    [ Hits: 13564 | Votes: 38 | Rating: 6.16 ]
Technical Reference : Coax Cables and Connectors
  • Coaxial Cable & Power Handling - This calculator can be used to estimate the attenuation (dB loss), power handling capability, and transmission efficiency for some of the more popular Wireless Communications and MIL Spec cables at the frequency of interest
    [ Hits: 1181 | Votes: 8 | Rating: 8.17 ]

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