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Antennas : 160M- 160M antenna for small lots or gardens
- Small & practical DIY inverted U antenna.
This design worked very well during the
2017 CQWW 160M SSB contest.
[ Hits: 1697 | Votes: 5 | Rating: 4.2 ]
- 80m Vertical Antenna with Folded CounterPoise
- A very efficient 80 meter Counterpoise antenna designed to reduce ground losses from inadequate radial systems beneath inverted L antennas, a project by DM2GM and DM4IM based on the original K2AV antenna concept.
[ Hits: 1088 | Votes: 2 | Rating: 7 ]
- End-Fed antenna for 160-80-40 meters band
- This PDF File desscribes how to homemade a multi-band end-fed trapped wire antenna resonating on the low bands of 160 80 and 40 meters. Contains trap design instructions and some construction tips.
[ Hits: 6218 | Votes: 29 | Rating: 7.65 ]
- Understanding the Hexbeam Antenna
- The Hexbeam is a great little antenna! It should be high on your list of options if you want a design that can be multi-banded, exhibits useful gain and directivity, is very lightweight, has a small turning radius, and which lends itself readily to Do It Yourself construction.
[ Hits: 505 | Votes: 4 | Rating: 8 ]
- 2M Aluminum Slim Jim Antenna
- Slim Jim Design and Theory and construction detaoils
[ Hits: 1837 | Votes: 1 | Rating: 3 ]
- Measuring 2.4 GHz Helix Antennas
- It is not very difficult to design and make a helix antenna for a specific frequency and gain. It is more difficult for the serious experimenter to make precise measurements of the finished antenna.
[ Hits: 746 | Votes: 5 | Rating: 9.2 ]
- Elecraft K3: Design, Configuration, and Operation
- KE7X Elecraft K3 operating manual
[ Hits: 430 | Votes: 2 | Rating: 3 ]
- KENWOOD TS-480 Series In-Depth Manual
- This document contains a great deal of information regarding the engineering intentions, design and technical information pertaining to the exceptional TS-480 series (TS-480SAT and TS-480HX) rigs
[ Hits: 842 | Votes: 3 | Rating: 2.33 ]
- Radius Power - DC Filters
- DC filters from radius power are specifically optimized for applications with DC supply like e.g. photovoltaic inverters. Radius Power provides total power solutions, EMI filters solutions from design to manufacturing, Three Phase, Single Phase, Power Line, IEC inlet, Power entry modules Filters.
[ Hits: 279 | Votes: 2 | Rating: 8 ]
- QSL Concept
- QSL Cards design and printing, offer free shipping and free graphic design from any quantity of photos and graphics
[ Hits: 395 | Votes: 10 | Rating: 9.1 ]
- Couplings Designer
- Couplings Designer for iPhone. Modern advanced filter synthesis using coupling matrix techniques. There's a free LITE version limited to 4th order filters.
[ Hits: 397 | Votes: 2 | Rating: 5.5 ]
- 2.3GHz ATV TX
- Ian G6TVJ design for a synthesised ATV transmitter covering the 13cm band and beyond up to about 2.6 GHz.
[ Hits: 580 | Votes: 2 | Rating: 7 ]
- Outdoor HF antenna Changeover Unit
- The unit was designed to assist with antenna comparisons
[ Hits: 745 | Votes: 0 | Rating: 0 ]
- Integrated Circuit Audio Amplifiers
- Circuit designs for IC audio amplifiers by N1HFX
[ Hits: 421 | Votes: 0 | Rating: 0 ]
- Design Guidelines for JFET Audio Preamplifier Circuits
- Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell
N1HFX
[ Hits: 642 | Votes: 4 | Rating: 1 ]
- Bandpass Filters for Portable Usage
- These are QRP rated 3 Pole Butterworth filters based on a design by K4VX, feature simplicity, almost no insertion loss, and reasonable rejection on the other ham bands.
[ Hits: 534 | Votes: 0 | Rating: 0 ]
- Tworsekey
- An open design exercise in interface archaeology, that decodes the input from a classic Morse key to send twitter messages
[ Hits: 616 | Votes: 0 | Rating: 0 ]
- K9KLT Power Line QRN Killer
- A power line noise eliminator designed to eliminate QRN expecially on 40 meters band.
[ Hits: 1361 | Votes: 1 | Rating: 10 ]
- 80m SSB CW QRP superhet transceiver
- The 80m SSB & CW transceiver design is based on an already proven concept used in ATLAS amateur transistorised transceivers from 70\'s
[ Hits: 1501 | Votes: 3 | Rating: 1.67 ]
- Software Defined Radio, SDR, Tutorial
- A nice tutorial and the basics of the software defined radio, SDR, and links of software defined radios to JTRS, and general SDR receiver technology.
[ Hits: 643 | Votes: 0 | Rating: 0 ]
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