NCR 915 MHz WaveLAN (2 Mbps DSSS) pictures and IC descriptions.
Most schematics are in their native Xcircuit PostScript format for ease of printing and modification. To use PostScript under Window$, you'll need to install the Ghostscript & Ghostview packages. Set Media to A2 for ease of viewing.
- Bi-Directional 915 MHz Amplifier Schematic Original design - reference only - don't build
- New Bi-Directional 915 MHz Amplifier Schematic Newest design - confirmed to work
- Pictures of the above amplifier. Each of the sections was built as an individual module. This makes trouble shooting much simpler.
Datasheets & Notes
900 MHz Antenna Ideas / Designs / Schematics / Suppliers
- Instructions for a homebrew 10-element 900 MHz quagi.
- Instructions for a homebrew 6 dBd 915 MHz colinear antenna
- Original 438 MHz colinear design.
- Instructions for a homebrew 6 dBd 915 MHz J-pole antenna
- J-pole antenna design notes
- Picture of a homebrew 915 MHz J-pole using bronze brazing rod.
- Homebrew Yagi antennas for $5.
- Homebrew high gain colinear antennas for repeater use.
- Homebrew high gain coaxial colinear antenna for 432 MHz. Very easy to make.
- Build A 9 dB, 70cm, Colinear Antenna From Coax By N1HFX
- Astron Antennas
- Down East Microwave
- Directive Systems
- M Squared The best deal.
Yagi antenna gain can be approximated by counting the number of elements and then using this formula: 10 log (number of elements). Example, a 8-element Yagi has an approximate gain of 9 dBd.
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