measure

188 links

Homebrew 6 Element Yagi for 70cm - VK2PSW
A fun little project I did over a couple of days was making this little ...

[ Hits: 404 | Votes: 2 | Rating: 7.5 ]

9:1 Balun and Unun - ON7IR
Homebrew a 9:1 transformer and measurement for testing purposes with a miniVNA

[ Hits: 109 | Votes: 0 | Rating: 0 ]

Troubleshooting Reversible Beverages - VE3VN
It is very worthwhile to understand how Beverages of all types work Without that understanding ...

[ Hits: 112 | Votes: 2 | Rating: 5.5 ]

How to evaluate Choke performance - m0taz
If you want to build your own common mode choke this article explains how to ...

[ Hits: 212 | Votes: 1 | Rating: 8 ]
High Performance common-mode chokes - G3TXQ
May 2015 Radcom Article on common mode chokes that can be used for control cables ...

[ Hits: 692 | Votes: 1 | Rating: 10 ]
High Performance Common-Mode Chokes - G3TXQ
This article is an attempt to shed some light on this misunderstood component covering topics ...

[ Hits: 132 | Votes: 0 | Rating: 0 ]

Spiderbeam VS Hex Beam - DJ0IP
Differences of Hex Beam and Spiderbeam antennas designs performance and measurements rotor considerations when using ...

[ Hits: 412 | Votes: 6 | Rating: 9.67 ]

What We Can Expect from a 2-Element Beam - W4RNL
Method Units of Measure and the Dipole Standard of Reference This article helps in understanding ...

[ Hits: 101 | Votes: 0 | Rating: 0 ]
Antenna Measurements - Bevelacqua
Testing of real antennas is fundamental to antenna theory The most common and desired measurements ...

[ Hits: 61 | Votes: 1 | Rating: 10 ]

Performance of 49:1 Ferrite Core Transformers - AF7NX
There are quite a few recipes for building a suitable transformer for an end fed ...

[ Hits: 151 | Votes: 4 | Rating: 7 ]

Double Quad Antenna for VHF UHF - IW5EDI
The structure of this dual band VHF UHF antenna is very simple It consists of ...

[ Hits: 249 | Votes: 6 | Rating: 6.33 ]

DJ9PK SWR Meters - DJ9PK
This device was designed as an SWR and power meter for Radio Amateurs In addition ...

[ Hits: 205 | Votes: 0 | Rating: 0 ]

Calculation of the Maximum Usable Frequency - IEEE
This paper presents the method of calculating the maximum usable frequency MUF and field strength ...

[ Hits: 245 | Votes: 2 | Rating: 5.5 ]

HF Radio Propagation Forecast - 4X4XM ^updated
This page offers radio amateurs experienced and beginners a useful overview and tutorials on HF ...

[ Hits: 365 | Votes: 20 | Rating: 8.85 ]

Ferrite and common-mode choke - DH1TW
Finding the the best ferrite material for a common mode choke How to create efficient ...

[ Hits: 185 | Votes: 1 | Rating: 10 ]

The definitive guide to RF Power measurement - QRP Labs
RF Power measurement using a DVM RF Power measurement using an RF detector RF Power ...

[ Hits: 138 | Votes: 0 | Rating: 0 ]

Common-mode chokes Measurements - IN3OTD
Common mode chokes are useful solutions for RFI reduction Winding a few turns of coaxial ...

[ Hits: 156 | Votes: 1 | Rating: 8 ]

Blocking Dynamic Range in Receivers - SM5BSZ
An explanation of the different procedures and definitions that are commonly used for blocking dynamic ...

[ Hits: 177 | Votes: 0 | Rating: 0 ]

SWR-Display - DL2KHP
The intention was to determine also very small SWR ratios with small power exactly With ...

[ Hits: 149 | Votes: 1 | Rating: 8 ]

Hermes-Lite SDR Project - IN3OTD
The author has build the Hermes Lite SDR v1 and v2 versions describing with a ...

[ Hits: 160 | Votes: 2 | Rating: 8 ]