All posts in the 'RF projects' Category
Posted on 26 Jun 2009
DiSEqC-Tester allows to test DiSEqC-Switches that uses 1.0 or 1.1 protocols. (DiSEqC-Switches with 2.0 and 2.1 protocol have backwards compatibility with 1.0 & 1.1 respectively and also may be tested). The device every second sends command “Switch next port”. [more]
Posted on 14 May 2009
Five by Twenty : A 5 tubes SSB QRP Transceiver for 20m Ham band.It is a true SSB transceiver built around just 5 vacuum tubes, with no transistors nor ICs. Superhet receiver with AGC and S-meter drives a loudspeaker, 5W transmitter. Very stable VXO uses CB crystals to cover 20m Ham band.[more]
Posted on 14 May 2009
This design use to boost the output power of low power FM broadcast band exciters, a number of these are available commercially, both as kits and ready made. The amplifier design is based on the recently introduced (1998) Motorola MRF171A MOSFET.The initial feasibility was performed using a linear RF and microwave simulation package, specifically Supercompact. [more]
Posted on 04 Apr 2009
Trax writes:
Here is my home-built, cloth iron soldered, range extender for CC1101 (included onboard) RF transceiver chip from Texas Instruments. You could say that it is a CC1101+CC2591, but for 868/920MHz band. I used MAX2233 RF amplifier from Maxim-IC. It can deliver up to +24dBm (250mW) of RF amplification with +10dBm of input.You can download the project files at the bottom of this page by clicking on red “download” button.
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Posted on 30 Mar 2009
Here is a quick guide to making electronic circuits with the FabLab 3D milling and scanning machine.With the support and versatile skills of Marc Boon participants will be guided through the simple steps to making an electronic circuit with the 3D milling and scanning machine.As case the participants will make a micro television.[more]
