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High Frequency Projects Blog

Amateur Radio

Tiger / Rat Tail for Handheld Radios

June 2, 2014 by Sebastian Westerhold 2 Comments
Tools needed to make a tiger tail for your HT

Handheld radios are getting more and more sophisticated and versatile. The bottleneck for modern handheld radios is often the stock antenna. There is an extremely simple yet very effective add-on called a “Tiger Tail” or “Rat Tail” to remedy this situation. This article is going to explain how to make your own. For less than … [Read more…]

Posted in: Amateur Radio, Electronics

850 MHz Scanner Preamplifier / Filter Project

June 2, 2014 by Sebastian Westerhold 6 Comments
The BCD996Xt scanner is very happy with the signal levels

This article shows how to use off-the-shelf parts to improve the performance of a radio scanner in the 800 – 900 MHz band. Furthermore, it shows how to expand radio coverage by using two different receive antennas at the same time. For some reason, my new BCD996XT scanner wasn’t working as expected on the statewide … [Read more…]

Posted in: Amateur Radio, Electronics, Radio Frequency (RF) Tagged: Mini-Circuits, Tektronix

HT RX/TX Performance Upgrade (Tiger Tail)

May 26, 2014 by Sebastian Westerhold Leave a Comment
Posted in: Amateur Radio, Electronics, YouTube

Yaesu FT-8800 Extended TX (MARS/CAPS) Mod

May 22, 2014 by Sebastian Westerhold 14 Comments
Startup screen of the FT-8800 indicating that the radio is resetting

The Yaesu FT-8800 and FT-7900 are very popular radios. For some activities, it may be desired to be able to transmit outside of the amateur radio bands. This article will show how to do this modification with minimum effort at home. Driving a transverter, participating in the Military Auxiliary Radio System (MARS) or Civil Air … [Read more…]

Posted in: Amateur Radio, Electronics

Microwave Frequency Meters

April 20, 2014 by Sebastian Westerhold Leave a Comment
Posted in: Amateur Radio, Electronics, Radio Frequency (RF), YouTube
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