Search results
Query: html
Links: 2652 | Categories: 0
This query is too generic. Please try adding an additional term to focus your research.
-
Online calculator and construction instructions -
YF1AR 80 to 40 meter vertical antenna project -
A two elements beam antenna tunable from 6 to 20 meters, based on the Maria Maluca antenna project by DB9EX, in german -
The Antenna Rotator Controller is unique in that it senses, displays, and controls to the earth's true magnetic field. The compass sensor, mounted in a waterproof enclosure, is attached to the mast and sends its signal to a microcontroller -
A W3DZZ trapped dipole for 80 40 and 20 meters band by ZL1BJQ -
An external keypad for FT-817(ND), for the serious portable/field-day contester/operator. Homebrew it with the free firmware and public circuit diagram. The circuit is very simple and takes power supply from the ACC port of the radio -
A wire yagi antenna model, easy to build, made using inverted vee elements and requiring just one support by ve3vn -
-
A three-frequency multi-band dipole that can be extended easily to additional bands. This article includes a multiband fan-dipole antenna for 80-40-20-10 meter band. -
A well documented article on a small magnetic loop antenna for the 40 meters band -
Listen to live Digital Police Radio's from Martin and St Lucie County -
-
New User Tips for VHF-UHF Operation by Dave Schultheis WB6KHP -
UM58 a regenerative receiver project -
Two 50 Mhz amplifiers and antenna switch -
-
The ZS6BKW wire antenna, a variant of the G5RV, utilizes a specific 13m (42.6 ft) length of 450-ohm window line as its matching section, feeding a 28.5m (93.5 ft) flat-top element. This design aims for lower SWR on 40m, 20m, 17m, 12m, and 10m compared to a standard G5RV, often achieving SWR values below 1.5:1 on these bands without an antenna tuner. The feedpoint impedance transformation provided by the window line allows for direct connection to 50-ohm coax on multiple bands. F4FHH's experience involved constructing the ZS6BKW and evaluating its performance against an _OCF dipole_ (Off-Center Fed) on various HF frequencies. The article includes observations on SWR readings and operational effectiveness, highlighting the ZS6BKW's suitability for multi-band operation. The antenna's overall length, including the flat-top and window line, is approximately **41.5 meters** (136 feet), making it a significant wire antenna for fixed station use. Comparative analysis with the OCF dipole provided practical insights into the ZS6BKW's advantages and limitations, particularly concerning bandwidth and tuner requirements. -
Long path hf radio propagation is sometimes the best path to work dx, since the shortest path is not always the best path. -
BktTimeSync synchronizes the PC time using an internet time server (NTP server) or a GPS receiver connected to USB, serial port or Bluetooth. Great for use with digital modes like FT8, JT65, JT9, JS8Call and others. For the operation of this program requires an active internet connection or a GPS receiver. This program works on all versions of Windows 32 or 64 bit -
Working with SDR#, adjusting frequency correction and basic setup. -
Need a variable power supply that is short circuit protected and over voltage protected; Here is a good one that can be built cheap by VE3IVJ -
-
An home made trapped dipole antenna for 40 and 60 meters band by 2E0HTS -
Regenerative receiver for 5 amateur bands : 80 40 20 17 15m by F5LVG -
yaesu radios community talk, impressions and comments about yaesu vx7r -
How to setup a Remote control ham radio station with Yaesu FT-8x7 radios via LAN or via internet. -
An interesting article about co-linear or collinear antenna building, by Karl Shoemaker, AK2O -
The simple dipole is perhaps the best antenna for consistent performance. Basic page on dipoles by G3PTO -
-
-
A small magnetic loop ready for a hand held walk and talk operation by PY1AHD -
Satellite Tracking and Orbit Propagation, Reports and Mission Planning Products, Pass Scheduling and Orbit Event Analysis, Dynamic Communications Link Modeling, 3-D Visualization of Complex Scenarios User Defined Regions and Contours, Constellation and Formation Flying Support, Global Positioning System Coverage -
-
How to use packet radio using the WindowsCE operating system -
A project for a balcony antenna that works on 7 10 14 MHz made by 2 PVC tubes coiled with insulated copper wire, a solution for restricted lots. -
This 1:49 transformer is used with wires any multiple of 1/2 wavelength. This is not a matching network, it's a wideband transformer and it has some advantages compared to LC matching -
-
-
Multiband no trap no gap antenna. This Antenna is a small wonder, easy to build and allow you to work all HF spectrum with your TRX and it's internal ATU. -
Homebrew a 1/4 wave 80 meter vertical using aluminium tubing -
A 10 Bands mobile antenna for about the price of 2 mobile monobanders. -
Add Solar-Terrestrial data to your website, by adding a simple html code to your pages by Paul L Herrman -
-
A must read guide for all new and old operators. This document was originally written with the prime focus on DXing and pileup behavior. Suggestions by proofreaders have been implemented; the document is not as narrowly focused anymore as originally intended. It contains hints, tips and tricks for newcomers as well as old-timers. Additionally there are VHF/UHF operational matters, DX Cluster ethics, COPS, Conflict Situations and more. -
Remote HF - VHF - UHF radio station using TS-2000 and remoterig devices -
The St. Louis Vertical Revisited by Dave Gauding, NF0R here are a few ideas and observations on the St. Louis Vertical -
Collection of TS-50 mods, LCD display dark, TS50<-->AT50 communication, TS-50 Power Mod for QRP, TX Coverage mod TS-50, CAT control for TS-50S -
-
2 element reversible verticals, small footprint, big results. -
A page about a Magnetic loop antenna project for the 40 meters band, includes nice pictures and history of construction