- some thoughts on 10 GHz amateur radio by OM Reiska, OH3MA from back in 1983 (in Finnish) (01.05.2017)
- finally added some stuff on my Minimalistic Rain Scatter experiments (03.01.2012)
- a couple of fun images of how I work the OH2RTE ATV repeater P5 on 10 GHz via building scatter
- started some highly experimental (especially the html...) 10 GHz Rain Scatter automatic online analysis (25.07.2010)
- the 2008 Nordic VUSHF conference was hosted by RATS ry and here is a video of the Construction Contest 10 GHz Receiver Reference Design (14.06.2009)
- I often enjoy just listening to the different microwave beacons in different propagation modes; OH3SHF (3.4 Mb) on 10 GHz Rain Scatter and here is a longer (8.3 Mb) clip (22.06.2008)
- a cool spectrogram shot of the OH3TR beacon in moderate rain 10 GHz rain scatter (160k)- can you spot the solar transit ? (28.08.2008)
- the broadband noise strip at around 0245UTC is the rising sun hitting the beam - you can estimate the beamwidth for yourself ;-)
- so, what do you think, is the 1. Fresnel fringe area 100 % free from obstructions ?
- some notes on microwave
scattering (21.08.2005)
- a photo of my home brew 8.4 GHz DSN receiver (photo: OH2KXH), taken at Viestikallio
- working on modifying a 300 W 14 GHz TWT (61k) to 10368 MHz for EME work
- A crystal controlled 10.45 GHz receiver to mount onto a 90 cm dish for Phase 3D ( photo, 55k )
- 10 GHz EME transverter used in 1995 for 10 GHz EME ( 116 k ) firsts from Finland
- Longest QSO on 10 GHz: 525 km from home, a Finnish record again !!!
- a photo of my most portable 60 cm dish ( 105k ) setup for 10 GHz
- a typical tropscatter path ( in this case a 92.2 km path regularly workable on 10 GHz ) Very definately NOT line of sight !!!
- studying different circular polarisation feeds for receiving the P3D X-band TX transmitter
- several FM-ATV television ( 64k ) transmitters and receivers ( photo of a portable rig ( 49k ) here )
- my current 10470 MHz portable FMATV transmitter uses a 60 cm dish (87k) with 33 dB gain
- rear view (80k) of the portable 10470 MHz 700 mW FMATV transmitter
- closeup view of the transmitter front panel (56k). The TX is based on a DRO oscillator for stability.
- three different variations of the G3JVL 10 GHz transverter ( photo of one here, 70k )
- here is a block diagram of my first G3JVL transverter
- and the block diagram of OM Pauli's G3JVL setup for our fist SSB/CW experiments back in the early 80'ies
- two crystal controlled full duplex two-way FM radios for 10.2 GHz
- rain scatter experiments
- P-HEMT LNA's for EME and weak signal operation ( photo 1, 50k, & photo 2, 59k )
- 10.368 GHz mobile packet radio in 1994 !!!
- loads of prototyping for the AMSAT Phase 3D X-band transmitter delivered by AMSAT-OH
- klystron and TWT experiments
- several Gunn oscillators
- antennas for the 10 GHz amateur band
- professional work on several 12/14 GHz satellite earth stations, including MPEG-2
- BIG file: notes on modifying a Ku-band feed to X-band ( in Finnish )
- CW beacons for 10368 and 10451 MHz, 1 W out, not QRV yet
- interesting double reflection QSO's from home with OH2DV, armchair copy at both ends, QRB = 27 km
- contesting from KP20LE on 1.3, 2.3 ( 76k ), 3.4, 5.6 and 10 GHz ( 84k ) with OH2AXH ( in blue, OH2BSH at the key )
- Finlands first CW and SSB QSO's with OH2DV using G3JVL transverters back in 1982
- here is a better photo of OH2DV's version of the famous G3JVL transverter used on OM Pauli's side
- here is a photo of me testing "high power" CW and FM with 10 W from a Hughes TWTA on the Pasila tower back in 1986, photo OH2DV
- further field tests on the Erkylä BC tower from around 1987, OH2AUE left, OHAWW right, photo OH2DV
- click here for photos of the OH2TI effort to accomplish the worlds first 10 GHz EME contact from way back in time !
- click here for some nostalgic photos from some 10 GHz tests in June 1984 !
- click here for photos of the Sinivuori Natural Park Fire Wardens lookout tower...
- click here for some photos of working SM0FZH from KP20DB during the Nordic VUSHF Meeting in June/2000
- click here for some photos of my eyeball QSO with VK40E, whom visited Finland in August 2000
- click here for some photos of some mobile and field 10 GHz AX.25 packet radio tests in 1986, photo OH2DV
- click here for presentation notes on 10 GHz propagation by OH3MA from back in 1983 (PDF, 580k)
