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@iz3mez
DX Cluster Spots WEB interface
DX Cluster Spots WEB interface
Published DX cluster via web access. This project still in beta test version, operating base is provided by a grab telnet and an RDBMS database.
There are filters for all bands of the IARU regions and set automatic update every 15 seconds, which allows the display of the last 30 DX spots.
URL: DX Cluster Spots WEB Interface
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New Year and New web access to ADS-B Radar
New Year and New web access to ADS-B Radar
Celebrate 2016 with the publication of data radar ADS-B, site in my QTH locator JN55XK, based on Raspberry Pi Quad Core.
The receiver consists of USB stick RTL2832u and tuner 820T2, home made vertical antenna for 1090 MHz and band pass
Antenna Radar Polar Plot (Test mode)
filter.
Data management is via Dump 1090, mode S decoder specifically designed for RTLSDR devices. The main features are:
Robu…
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Log4OM - Complete management of the station log
Log4OM – Complete management of the station log
Log4OM is free software developed by Daniel Pistollato IW3HMH (team Terry G4POP, Chuck K7PT, Claus EI7JZ, Rolf LA9FFA, Peter G3ZSS) for the complete management of the station log. The application is developed in C # and is compiled for any Windows operating system, XP and above (Vista, Windows 7 & 8 ++++).
The software will only run on Linux machines using the “Wine” Windows emulator or Mac OS…
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SvxLink Server by SM0SVX
SvxLink Server by SM0SVX
SvxLink is a project that develops software targeting the ham radio community. It started out as an EchoLink application for Linux back in 2003 but has now evolved to be something much more advanced. It is a project of Tobias Blomberg SM0SVX.
The SvxLinkServer is a general purpose voice services system, which when connected to a transceiver, can act as both an advanced repeater system and can…
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SDR Colibri EN FHD from HF to 6m
SDR Colibri EN FHD from HF to 6m
Technical characteristics:
Receiving bandwidth, MHz 0.01 – 55 (0.01-62.5) Receiving bandwidth in all Nyquist zones, MHz 0.01– 800 Spectrum scope bandwidth (up to), MHz 62.5 Amount of independent receiving channels 2 Sensitivity, mkV 0.3 Blocking Dynamic Range (BDR), dB 110 IMD3 Dynamic Range, dB 90 Image channel suppression, dB >110 Supply voltage range, V 4.5…5.5…
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New AMPR Net Search Engine for HAM Radio
New AMPR Net Search Engine for HAM Radio
Today announced that it is published in testing the new search engine dedicated to the network AMPR Net. 3MEZ Ham Search Engine is accessible from the entire class 44.0.0.0/8
To test the service can be reached via http://web.iz3mez.ampr.org or http://44.134.14.100
In the coming days will be published other details. Thank you all for the support.
73s de Francesco, IZ3MEZ
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New Raspberry Pi 2 Model B with 900MHz quad-core ARM
New Raspberry Pi 2 Model B with 900MHz quad-core ARM
The Raspberry Pi 2 Model B is the second generation Raspberry Pi. It replaced the original Raspberry Pi 1 Model B+ in February 2015. Compared to the Raspberry Pi 1 it has:
A 900MHz quad-core ARM Cortex-A7 CPU
1GB RAM
Complete compatibility with Raspberry Pi 1
Like the (Pi 1) Model B+, it also has:
4 USB ports
40 GPIO pins
Full HDMI port
Ethernet port
Combined 3.5mm audio jack and composite video
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Arduino for Ham Radio, Glen Popiel KW5GP, ARRL
The Arduino has become widely popular among hobbyists and ham radio operators. Hams are exploring these powerful, inexpensive microcontrollers, creating new projects and amateur station gear. With its Open Source model, the Arduino community freely shares software and hardware designs, making projects easier to build and modify. Arduino for Ham Radio introduces you to the exciting world of…
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Live sporadic-e MUF software calculator
Live sporadic-e MUF software calculator
Live MUF is a DXC (cluster) telnet client developed by G7RAU which attempts to resolve propagation modes from spots and also attempts to calculate sporadic-e possibilities purely based on incoming data from the cluster. It has great circle mapping (GCM) built in to the app for live mapping of spots.
Live MUF also can be used as a world wide converse telnet client, ON4KST telnet client and DXC at…
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AOR AR-DV1 - Analog and digital voice receiver
AOR AR-DV1 – Analog and digital voice receiver
AOR AR-DV1 is a stand-alone SDR receiver which can receive both analog and digital transmissions. It is compatible with many popular digital modes:
DMR (Digital Mobile Radio)
dPMR (Digital Private Mobile Radio)
D-Star
APCO-25
NXDN
Yaesu Digital
Alinco Digital
Digital-CR
AOR G4GUO (=used in ARD9000/9800)
Main Features:
・100kHz-1300MHz Wide-band reception ・Multi-mode digital demodulation ・A…
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VSWR, Return Loss and Transmission Loss vs. Transmitted Power
Table VSWR, Return Loss and Transmission Loss vs. Transmitted Power.
Return Loss Trans. Loss Volt. Refl Power Trans Power Refl VSWR (dB) (dB) Coeff (%) (%) 1.00 — .000 .00 100.0 .0 1.01 46.1 .000 .00 100.0 .0 1.02 40.1 .000 .01 100.0 .0 1.03 36.6 .001 .01 100.0 .0 1.04 34.2 .002 .02 100.0 .0 1.05 32.3 .003 .02 99.9 .1 1.06 30.7 .004 .03 99.9 .1 1.07 29.4 .005 .03 99.9 .1 1.08 28.3 .006 .04 99.9 .1…
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SDR from 100KHz to 6GHz
SDR from 100KHz to 6GHz
The Crimson SDR from Per Vices is the future of software defined radio. The flexible wideband, high-gain platform comes equipped with four independent receive chains and four independent transmit chains, each capable of up to 200MHz of RF bandwidth up to 6GHz. At the core of the digital front, Crimson is powered by an Altera Arria V FPGA (5ASTMD3E3F31I3N) with an on-chip dual-core ARM Cortex-A9…
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HF receiver WJ-8711A
The WJ-8711A is a fully synthesized, general-purpose HF receiver for monitoring RF communications from 5 kHz to 30 MHz with 1-Hz tuning resolution. By combining analog and digital signal processing (DSP), the WJ-8711A achieves high performance at low cost. DSP techniques accomplish functions such as noise blanking, IF filtering, AGC, demodulation, Beat Frequency Oscillator (BFO) and passband…
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Noble Radio NR-4SC 4 Meter SSB/CW Transceiver
Noble Radio NR-4SC 4 Meter SSB/CW Transceiver
The Noble Radio NR-4SC is a simple to use 10 Watt (minimum) 4 Meter SSB/CW transceiver. The radio operates USB and CW. The NR-4SC uses a single conversion design with an IF frequency of 10.7 MHz. Front end bandpass filters limit out of band signals into the RF Preamp stage. A double balanced diode ring mixer provides good strong signal handling capability. There are two 8 pole crystal filters…
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All Digital Transceiver ADT-200A by HB9CBU
All Digital Transceiver ADT-200A by HB9CBU
The project name ADAT (All Digital Amateur Transceiver) denotes an ongoing development of an amateur transceiver which consequently uses digital signal processing. Therefore, all relevant functions are performed by software providing a very high degree of flexibility. Similar products are available on the market as Software Defined Radios (SDR), but all those use the ressources of a PC…
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Understanding and solving RF interference problems
Understanding and solving RF interference problems
This tutorial by Jim Brown (K9YC) describes, analyzes, understanding and solving RF interference problems.
Chapter 1 – Some Fundamentals
Chapter 2 – Ferrites
Chapter 3 – Back to the Basics
Chapter 4 – More Suppression Applications
Chapter 5 – Suppressing Interference To Your Ham Station
Chapter 6 – Baluns
Chapter 7 – K9YC’s Choke Cookbook
Chapter 8 – Solving Problems in the Shack
Chapter 9 – A…
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