.:Info
Nick: Olli  Info
Age: 33
Location: Helsinki

.:Projects by user
  • Microwave power meter
  • 2.4 GHz Directional Wlan Antenna
  • VHF transmitter CW/AM

    • .:Albums
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  • Default
  • +-12 V PSU
  • 10 GHz FM-TX
  • 2.4 GHz Antenna
  • MW power meter
  • VHF transmitter

    • .:


    Title: MW power meter
    Created: 13.01.2009 00:24
    This little box act as a microwave power meter (ie. could be used for measuring transmit power of a wlan router etc.)
    Title: 10 GHz FM-TX
    Created: 13.01.2009 00:07

    Horn antenna and it's wave guide. (see my other pic of this also)
    Horn antenna and it'...    		 It's a ~10 GHz FM-transmitter for video. I accidentally threw away all the papers about mesurments so I can't confirm the exact transmit frequency. The basic idea is pretty simple. First there is a dielectric resonator oscillator (that gray disc on the left bottom corner). The signal is passed to a band pass filter on the right side of resonator. The there is two clas-A amplifier stages. After second stage the signal is fed to a tap in a horn antennas wave guide. FM modulation is done by altering suply voltage of the resonator. Oh an the most important thing... I made this transmitter by modifying a LNB which was used to receive analog satellite TV. http://en.wikipedia.org/wiki/Low-noise_block_converter I was able to receive picture with another LNB and SAT-receiver. Although the picture was prety noisy because the resonator on transmitter was "little" broken and it was then very unstable.
    It's a ~10 GHz FM-tr...
    Title: 2.4 GHz Antenna
    Created: 06.01.2009 20:55
    2.4 GHz Directional Wlan Antenna
    Antenna in 4nec2 antenna simulator.
    Antenna in 4nec2 ant...    		 2.4 GHz Directional Wlan Antenna
    2.4 GHz Directional ...
    Title: VHF transmitter
    Created: 29.12.2007 01:48
    CW/AM transmitter
    Title: +-12 V PSU
    Created: 27.12.2007 18:17
    PSU for phono amp.
    Back panel.
    Back panel....    		 Front panel.
    Front panel....    		 Inside view ----------- There is a ATmega8 mcu with a 4 MHz crystal to provide accurate delay on startup ;)
    Inside view...
    Default album
    Wiikon Wappu & "ghettoblaster"
    Wiikon Wappu & &...    		 VAX 6310 and HSC50 3x KA62B processors (3 more will be installed soon) 96 MB of memory (96 MB more will be installed soon) 10 MBit AUI-Ethernet TK50 CompacTape drive CI bus (VAXcluster bus) Max heat power 1650 W Weight: uhm... much HSC50 is a standalone storage server for VAXcluster system. It can manage a full size cabinet of hard disks with RAID-0 or RAID-1.
    VAX 6310 and HSC50...    		 Oldies but Goldies
    Oldies but Goldies...    		 ATmega8 board.
    ATmega8 board....
    Pimp My Fonero === -Serial port (for stty) -Second antenna (to offer both polarizations) -dd-wrt (so we could get rid of babylon)
    Pimp My Fonero...    		 USB test bench with amp meter Made at Campus Party '07 www.campus-party.org
    USB test bench with ...    		 3 led flashers. Smallest one is still too big.
    3 led flashers....