signal 4

125 links

Baluns and Ferrites Basics - VE2AZX
Unlock the secrets of RF signal optimization in a presentation covering Balun essentials diverse types ...

[ Hits: 199 | Votes: 3 | Rating: 9.67 ]

Comparing Mobile whip versus EF HW Vertical - PH0NO
PH0NO conducted field tests comparing a mobile antenna DX UHV to an end fed half ...

[ Hits: 81 | Votes: 0 | Rating: 0 ]

Moxon Mania - Building the Ultimate 4-Band Moxon Antenna - W7JMP
The article details the design and construction of a four band Moxon beam by a ...

[ Hits: 96 | Votes: 0 | Rating: 0 ]

Open-Folded W8JK Antenna for HF - F5NPV
Originally designed by John Kraus W8JK in about 1940 this antenna has some interesting properties ...

[ Hits: 141 | Votes: 1 | Rating: 3 ]

2m Slim Jim portable antenna for SOTA - VK1AD
Construct a portable 2m Slim Jim antenna for improved HT signal quality Utilizing 450 ohm ...

[ Hits: 67 | Votes: 0 | Rating: 0 ]

Cloverleaf Antenna - Oscarliang
Cloverleaf antenna is a circular polarized antenna which is way better than the cheap dipole ...

[ Hits: 64 | Votes: 0 | Rating: 0 ]

Airplane scattering - W3SZ
Operating on Airplane scattering Scattering of radio signals by airplanes An introduction to operating ariplane ...

[ Hits: 165 | Votes: 0 | Rating: 0 ]

A mobile radio installation - KG4JJH
Detailing a Yaesu FT 857 and ATAS 120 installation in a 1997 Toyota Tacoma the ...

[ Hits: 44 | Votes: 1 | Rating: 3 ]

Hamstick Experimentation: A Day of Surprising Results - WK4DS
In his POTA activation WK4DS experimented with radials for hamstick antennas Despite sun and RF ...

[ Hits: 44 | Votes: 0 | Rating: 0 ]

VHF APRS Propagation Map - APRS
VHF Based on realtime APRS reports This map shows real time radio propagation from stations ...

[ Hits: 318 | Votes: 0 | Rating: 0 ]

FT-817 Audio Speech Compressor: Boosting Signal Power with SSM2165 - AD5X
Designed for the FT 817 this audio speech compressor centered on the Analog Devices SSM2165 ...

[ Hits: 60 | Votes: 0 | Rating: 0 ]
Yaesu FT-817 Audio Enhancement: Heathkit-inspired Homebrew Project - KG4JJH
Inspired by Heathkit author aimed to enhance his Yaesu FT 817 with audio and RF ...

[ Hits: 81 | Votes: 1 | Rating: 2 ]

MSF radio time signal - NPL
The MSF radio signal is a dedicated standard frequency and time broadcast that provides an ...

[ Hits: 50 | Votes: 1 | Rating: 10 ]
DCF77 - PTB
DCF77 is a time signal transmitter operated by the Physikalisch Technische Bundesanstalt PTB It broadcasts ...

[ Hits: 57 | Votes: 1 | Rating: 10 ]
JJY - NICT
JJY is a time signal transmitter operated by the National Institute of Information and Communications ...

[ Hits: 31 | Votes: 0 | Rating: 0 ]

20 W HF Power Amplifier - IN3OTD
A HF power amplifier with a push pull of AFT09MS015N The small signal gain of ...

[ Hits: 175 | Votes: 0 | Rating: 0 ]

Arduino QRP Transceiver: DIY Success on HF Bands - M0XPD
This article introduces an Arduino based QRP CW Transceiver designed for lower HF bands The ...

[ Hits: 116 | Votes: 1 | Rating: 1 ]

Build an Arduino CW Decoder - KG4JJH
An Arduino Based Solution for 5 35 WPM Signals Explore the circuit controls and setup ...

[ Hits: 363 | Votes: 3 | Rating: 7 ]

40 Segment LED S-Meter - n6bg
Provide your radio with a very string signal then adjust the HIGH LEVEL pot to ...

[ Hits: 94 | Votes: 0 | Rating: 0 ]

2m to 70cm Transverter Circuit - VK4ADC
A 70cm 432 MHz Transverter Project transverter circuit is an electronic device that converts a ...

[ Hits: 82 | Votes: 0 | Rating: 0 ]