Grid

The DXZone.com

Grid

94 links - and 2 categories

Antennas : Magnetic Loop
  • A More Efficient Magnetic Loop Antenna - The idea behind this antenna was to use multiple conductors in parallel to reduce the resistance losses in the antenna , and thereby improve the efficiency.For a given magnetic loop antenna, doubling the number of conductors from one to two will typically increase efficiency by about a factor of two. There is a limit, and beyond three or four conductors further increases are small, and may not be worth the bother.
    [ Hits: 212 | Votes: 2 | Rating: 5.5 ]
  • Magnetic Loop 600 KHz-4MHz - The antenna is built on a cross-shaped frame with spar width (and height) of 48 inches, providing a height of 52 inches and a width of 49 inches. This antenna costs only about $45 to construct and can be built in just a few hours using simple hand tools. The best part is that the performance on 160M and 80M is excellent
    [ Hits: 172 | Votes: 3 | Rating: 4.33 ]
DX Resources : DX Peditions : 2024 DXpeditions Operating Aids : Grid Squares
  • Interactive Grid Square Map - An online interactive grid square map made with openstreet map. Just point and click and zoom in to determine an accurate grid square locator till 10 digit resolution
    [ Hits: 556 | Votes: 6 | Rating: 6.67 ]
Software : Databases
  • Repeater-START App - The amateur radio listener for when you're not on the radio. Repeater-START, the offline repeater listing app for Windows, Linux, Raspberry Pi, Ubuntu, Librem Phone is available, Now with grid square display, topographical maps and frequency preferences
    [ Hits: 150 | Votes: 0 | Rating: 0 ]
Technical Reference : Alternative Power
  • Conventional or Inverter Generators - Generators are broken down into three basic types: conventional gas, inverter, and diesel. What is the difference between these? Which is best? Do you even need a generator if you already have solar or other off grid energy available? Let’s sort it out.
    [ Hits: 52 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : HF Amplifiers
  • Building a Robust PL519 Tube HF Amplifier - his article explores the construction of a PL519 tube amplifier, utilizing Ulrich L. Rohde N1UL's insights. Focusing on a modest 25W continuous output, the design ensures robustness with forced air cooling. The detailed breakdown covers input matching, screen grid voltage generation, bias adjustment, anode power supply, heater power supply, and monitoring circuitry, providing valuable guidance for ham radio enthusiasts.
    [ Hits: 41 | Votes: 0 | Rating: 0 ]
Technical Reference : Audio
  • A switched Capacitor Audio Filter - Here is a rather nice audio filter for use with Ham Radio gear. It features switchable operation as a -32 dB per octave low pass or notch filter having a 200Hz-2500Hz tunable cutoff frequency, buffered input and output, switch selectable filter bypass function, and good stability. T
    [ Hits: 71 | Votes: 0 | Rating: 0 ]
Technical Reference : Batteries
  • USB-C charging for Handheld Radio Transceivers - The article highlights the common absence of modern USB-C ports on handheld ham radios and the limited use of USB for power. The author, [jephthai], shares a solution involving a USB-C cable with power negotiation capabilities, allowing the radio to be powered by USB. By splicing Anderson power pole connectors onto the cable, the radio can now be conveniently powered by a USB battery bank, providing a practical alternative to traditional 12 V batteries for off-grid operations.
    [ Hits: 141 | Votes: 1 | Rating: 10 ]
Technical Reference : Preamplifiers
  • A JFET preamplifer for 50 MHz - The circuit is simple, designed with a low component count and an inherent simplicity in order to keep the cost of building the preamplifier low, and to assure low noise operation.
    [ Hits: 95 | Votes: 0 | Rating: 0 ]
Technical Reference : Radio Frequency Interference
  • Stop RFI from Solar PV Systems - Stop EMI RFI Interference in Off Grid Solar PV Systems, in this article the author provides hints on tracking down the EMI or RFI source, shielding and grounding in order to eliminate interferences on the whole HF and VHF ham radio bands
    [ Hits: 80 | Votes: 0 | Rating: 0 ]
  • RF-Quiet Solar PV for Ham Radio - This article discusses the potential for solar power systems to coexist harmoniously with amateur radio, challenging the notion that they are inherently incompatible. Drawing from personal experience, the author emphasizes the importance of selecting RF-quiet components, focusing on series-string Sunny Boy grid-tie inverters. The article also highlights considerations for system design and limitations based on roof orientation, shading, and array size. Overall, it presents a valuable perspective on creating a radio-friendly solar PV setup.
    [ Hits: 77 | Votes: 1 | Rating: 1 ]
Technical Reference : Software Defined Radio
  • A Simple Hybrid Software Defined Radio - This Hybrid SDR is a combination of a current technology analog radio techniques, used with a direct conversion software defined radio to create a single conversion "hybrid" radio that is usable over a wide range of frequencies
    [ Hits: 113 | Votes: 0 | Rating: 0 ]
Technical Reference : Spectrum Analyzers
  • A Simple Spectrum Analyzer - This is a swept-filter spectrum analyzer. Basically, RF and swept oscillator signals are fed to a mixer and the output of the mixer is passed through a highly selective crystal filter.
    [ Hits: 119 | Votes: 0 | Rating: 0 ]

Not satisfied ? Lookup Google Custom Search Engine for Grid


Search Grid with: Yahoo!, DuckDuckGo , Bing

Search

Related Searches

Get our links, Everywhere!

Follow us on Social Networks
RSS Feeds The DXZone.com RSS feed

Sign up for daily Newsletter

Service provided by Google FeedBurner

Free for your Site

Add our gadgets to your site
Daily Top 10 links

Google Custom Search