- a 10.7 MHz -> 30 MHz converter for interfacing my ICOM R-7000 to noise test equipment
- my 3 meter 2 meter antenna experiment (emergency setup for contest) - in Finnish
- here you can find some notes on modifying the Fujitsu FMC080901-70 power amp to 1.3 or 2.3 GHz (in Finnish)
- microwave band expeditions to good locations and even some contesting too...
- Magnetometer for indicating possible Aurora Borealis ( an example: OZ6ABA ( 152k ) in radio aurora on 144 MHz SSB )
- here you can find a somewhat underdeveloped version of my HP41C dish gain/focal length/beamwidth calculator...
- a basic freespace attenuation calculator for the HP41C
- a basic noise floor calculator for the HP41C
- 10 MHz secondary frequency reference ( 68k ) using TV signals ( something in Finnish here ).
- P3D satellite X-band transmitter IHU simulator
- a DC - 12 GHz microwave power meter ( 70k ) for -10 ... +25 dBm levels
- CCD camera adaptor for my 10.5 cm reflector telescope
- prototype broadband gain equalized amplifier ( 73k ) with fault alarm
- BIG file: loads of prototyping different RF & Microwave circuitry !
- electronic fish float
- automotive burglar alarm
- electronic mole deterrent
- homemade 500 MHz spectrum analyser ( 53k ) with 70 dB spurious free dynamic range
- Geiger Mueller ( 65k ) counter sensitive to beta and gamma radiation
- putting together an OH-TNC2 that I later used for Finlands first 10 GHz mobile packet radio experiments with OH2BSH
- NICAM digital stereo TV sound/video receiver ( 40k ) with analogue OIRT and PAL B/G sound systems too
- a modification to the IC202S transceiver to use it as a 10.7 MHz SSB/CW exciter for testing the P3D X-band TX
- two and four channel meteor scatter recordings of 144 MHz beacons
- here you can also find the dimensions for parabolic dish dipole feeds (31k) for five different ham microwave bands
- and here is a photo (32k) of OH2AXH's beautiful tropo dish feeds for 1.3, 2.3, 5.7 and 10.3 GHz.
- Morsezeichengeber, a real hardware, non-solid state CW keyer, notes in Finnish
