transmission 145 links
Antennas : 160M
- Low band antennas for 80 and 160m
- Antennas for the Low Bands. Plans and pictures of 80m and 160m antennas, both for transmission and reception built by EI7BA
[ Hits: 52790 | Votes: 23 | Rating: 7.22 ]
- Balun single core 4:1 analysis
- Real 4:1 Transmission Line Balun with Balanced Load
[ Hits: 5953 | Votes: 1 | Rating: 10.00 ]
- 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: 1167 | Votes: 0 | Rating: 0.00 ]
- Antenna Transmission Line Power Splitters
- Several ways of splitting power to feed two like (50 ohm terminal impedance) antennas.
[ Hits: 323 | Votes: 0 | Rating: 0.00 ]
- Integrated Publishing Basics
- Radio wave propagation, Principles of transmission lines, Antennas
[ Hits: 900 | Votes: 0 | Rating: 0.00 ]
- Radio Resources for PMR 446, Scanning, Broadcast and CB Radio
[ Hits: 2125 | Votes: 4 | Rating: 6.00 ]
- 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: 682 | Votes: 0 | Rating: 0.00 ]
- 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: 2828 | Votes: 7 | Rating: 8.57 ]
- First radio signal over Atlantic
- Description od Marconi's first transmission over Atlantic Ocean
[ Hits: 723 | Votes: 6 | Rating: 3.00 ]
- 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: 1589 | Votes: 1 | Rating: 10.00 ]
- 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: 596 | Votes: 1 | Rating: 1.00 ]
- FT-950 mod - expand TX
- Yaesu FT-950 MARS/CAP extend transmission to 1.8-30Mhz and 50-54Mhz.
[ Hits: 5699 | Votes: 19 | Rating: 5.32 ]
- UK Scanner frequency database
- Large frequency database of uk counties, includes forums and reviews
[ Hits: 30507 | Votes: 105 | Rating: 4.94 ]
- Introduction to Spy Numbers Transmissions
- Introduction to Spy Numbers Transmissions and numbers stations with reference of most popular decoders working groups
[ Hits: 4449 | Votes: 6 | Rating: 6.00 ]
- 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: 1263 | Votes: 4 | Rating: 4.75 ]
- XLZIZL by AC6LA
- XLZIZL is an Excel application that analyzes the components of an antenna feed system, including transmission lines, stubs, baluns, and tuners. Calculations include impedance transforms, SWR and reflection coefficient, power loss, voltage and current standing waves, stress on tuner components, network attenuation (S21), and return loss Analysis results are available in worksheet format and in five different chart formats, including Smith charts.
[ Hits: 1373 | Votes: 2 | Rating: 1.50 ]
- 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: 23246 | Votes: 17 | Rating: 6.59 ]
- Atpdec is an open source program that decodes images transmitted by POES NOAA weather satellite series.
These satellites transmit continuously, among other things, medium resolution images of the earth on 137Mhz.
These transmissions could be easily received with an inexpensive antenna and dedicated receiver.
For more information about receiving POES satellite images consult the rig site.
[ Hits: 2910 | Votes: 2 | Rating: 9.00 ]
- 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: 1023 | Votes: 8 | Rating: 8.17 ]
- Are you ready for BPL
- Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service
[ Hits: 573 | Votes: 0 | Rating: 0.00 ]
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