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AC Power Filter
Control of AC power line noise and surges is vital for today's radios and computers. (Polyphaser PLDO-120) -
RF Amplifier
The ARRL Handbook described the HB-70-2 amplifier that Allen Poland, Jr, K8AXW, decided to build for himself. -
Parabolic Dish Antenna
Peter, G3LTF, changes feeds on his 6-m polar-mounted dish. -
Station Design
Andrew Genau, KC2GOW, seems to have captured the idea of station building! -
VHF/UHF Rovers
W9FZ and N9REP meet for an "eyeball QSO" between contest sessions.
Introduction
Amateur Radio has always developed hand in hand with electronics and radio technology. In this area, we provide some introduction and a lot of links to reference information drawn from ARRL publications and other sources. The emphasis is on technology. To find out more about operating techniques, you can also visit the On the Air pages.
Browse the selected topics in the boxes below, or choose from the menu of available topics at the left of your screen.
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Safety
Make sure you're as safe as you can be while putting up your rig. Learn More
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Circuit Construction
Make sure you're building your circuits the right way we offer some good advice. Learn More
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Modes and Systems
Find out about the different modes and systems available for Amateur Radio. Learn More
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RF and AF Filters
Interference is something that all hams may run into, find out how to handle it. Learn More




