X band projects...


X band experiments and projects:

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- 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 (6 Mb) on 10 GHz Rain Scatter and here is a longer (11 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 Erkylš 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


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Updated 11.07.2013