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Antennas : Baluns- Antenna Balun
- What is an antenna balun, why and when do you need it, type of transformers, impact on SWR and feed line efficiency.
[ Hits: 1328 | Votes: 1 | Rating: 8 ]
- 4:1 QRO Balun
- A home made 4:1 Ferrite QRO Bal-un with a FB 241-61 Type K
[ Hits: 812 | Votes: 5 | Rating: 6 ]
- Antennas for portable operations
- Article describing various type of portable antennas, from verticals, to dipoles, vertical dipoles, random wire with tuners, and end-fed antennas
[ Hits: 500 | Votes: 0 | Rating: 0 ]
- Corrosion in a marine installation
- We all understand the importance of corrosion protection, especially in harsh marine environments. This article explains different types of corrosion and how to avoid them
[ Hits: 395 | Votes: 3 | Rating: 3.67 ]
- Simple Gain Antennas for the Beginner
- You do not need to invest an absurd amount of money to build a beam type of antenna. Good performance can be obtained with simple antennas made from some very ordinary materials. QST article
[ Hits: 1059 | Votes: 4 | Rating: 6.5 ]
- Comsystems Solutions
- HF Antennas is a division of Comsystems Solutions we manufacture wire broadband antennas and different type.
[ Hits: 187 | Votes: 2 | Rating: 3 ]
- Generate CW Practice files
- Gnerate morse code at various speeds and with lots of different types of content, everything from individual letters up to a full QSO.
[ Hits: 593 | Votes: 4 | Rating: 4.75 ]
- What is Radio Propagation - RF propagation
- Discover the key facts about what radio propagation is, the different types available and how they affect different frequencies.
[ Hits: 198 | Votes: 1 | Rating: 10 ]
- TRS RenTelco - Test Equipment Rental
- TRS RenTelco provides new or used electronic test equipment for rent, lease or purchase. Solutions are provided for various type of equipment such as spectrum analyzers, network analyzers, oscilloscopes etc from leading manufacturers. Our products are widely used in communications, R&D, semiconductor, and wireless industries.
[ Hits: 234 | Votes: 0 | Rating: 0 ]
- qrpTracker
- qrpTracker is a satellite tracking program that works on the popular and easy-to-program Arduino platform
qrpTracker is meant for amateur satellite enthusiasts and computing hobbyists
[ Hits: 612 | Votes: 1 | Rating: 7 ]
- Arduino based antenna rotator controller
- Inspired by Milan OK7GU, the goal is to build an universal antenna controller - for different types of rotor, different motor, encoder
[ Hits: 1196 | Votes: 3 | Rating: 6 ]
- ARDUINO CW decoder
- Yet another Arduino CW Decoder based on the OZ1JHM prototype this include a custom program that can be downlaoded along to component list and pictures
[ Hits: 867 | Votes: 1 | Rating: 6 ]
- Audio Cables
- Article with answers to common questions as what cable types to user, cable length, how to join ends.
[ Hits: 268 | Votes: 0 | Rating: 0 ]
- Replacing the battery of the Yaesu DVS-2 memory recorder
- After a few years the lithium battery cell from the Yaesu DVS-2 will be exhausted.
To replace the battery in the future there is a more easy way, than replacing it with the same type of battery as installed in the DVS-2.
[ Hits: 311 | Votes: 1 | Rating: 8 ]
- PL-259 vs Type N Connector on 430 MHz
- A test and comparison of real attenuation of N-type connectors and PL-259 connectors on UHF bands, domonstrating that connectors are almost equivalent.
[ Hits: 709 | Votes: 2 | Rating: 7 ]
- N Type connectors over SO-239 at VHF/UHF
- How much better is an N over SO-239 at VHF/UHF, a discussion topic at eham
[ Hits: 466 | Votes: 1 | Rating: 5 ]
- RF filter basics tutorial
- an overview, introduction or tutorial about the basics of electronics filters including the types of filter and the various filter design considerations and parameters
[ Hits: 309 | Votes: 0 | Rating: 0 ]
- GaAs FER Pre Amp Cookbook
- There are many designs for building preamps each with their own advantages and disvantages. In this PDF Article author reviews several different types.
[ Hits: 697 | Votes: 0 | Rating: 0 ]
- How to make a mains filter for EMC and noise reduction
- Article showing how I've made a mains filter to reduce EMC in the electricity supplying my shack. I've used a type 31 Fair-Rite ferrite core and the video shows how this performs on 160m through to 40m.
[ Hits: 1222 | Votes: 5 | Rating: 9.6 ]
- Analyzing 6 handheld antennas with a VNA
- In this article the author analyze six different type of VHF handheld antennas and as result of his self training on his new vector network analyzer published this interesting report
[ Hits: 408 | Votes: 1 | Rating: 1 ]
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