OK1TEH JO70FD 10 GHz log - PHOTOS + INFO
15dB HORN (measured 3W on waveguide output) + 6W PA + transvertor DB6NT + FT290R .
DB6NT transvertor 2m/3cm (200mW out) with 6W PA
Detailed picture of 6W PA from DK2FD, 3W at antenna from waveguide
Oscillator with 10 MHz OCXO (by OK1VPZ)
More in Czech version at:
http://www.ok2kkw.com/mw2004.htm
http://www.ok2kkw.com/00003016/pll_10ghz/frekvencni_synteza.htm
http://www.ok2kkw.com/00003016/pll/pll_lo.htm
http://www.ok2kkw.com/00003016/sequencer/sequencer.htm
Some facts about my horn antenna
Gain of HORN antenna for 3cm (source http://www.ok2kkw.com/00003016/3cm/horn.gif)
|
Gain (dBd) |
A side (mm) |
B side (mm) |
Length (mm) |
High HA (mm) |
High HB (mm) |
alfa (°) |
beta (°) |
K side (mm) |
| 14 | 68,2 | 50,5 | 26,2 | 33,1 | 34,6 | 55,6 | 59,8 | 40,1 |
| 15 | 76,5 | 56,7 | 36,5 | 43,4 | 45,3 | 58,2 | 62,8 | 50,9 |
| 16 | 85,8 | 63,6 | 49,6 | 56,5 | 58,9 | 60,9 | 65,6 | 64,7 |
| 17 | 96,3 | 71,3 | 66,7 | 73,4 | 76,1 | 63,4 | 68,1 | 82,1 |
| 18 | 108,1 | 80,0 | 88,5 | 95,1 | 98,2 | 65,9 | 70,4 | 104,2 |
| 19 | 121,2 | 89,8 | 116,2 | 122,8 | 126,2 | 68,2 | 72,5 | 132,3 |
| 20 | 136,0 | 100,8 | 151,6 | 158,2 | 161,8 | 70,3 | 74,4 | 168,0 |
| 21 | 152,6 | 113,1 | 196,6 | 203,2 | 207,0 | 72,3 | 76,0 | 213,3 |
| 22 | 171,3 | 126,9 | 253,7 | 260,3 | 264,3 | 74,1 | 77,5 | 270,7 |
| 23 | 192,2 | 144,3 | 326,2 | 333,0 | 337,0 | 75,7 | 78,7 | 343,6 |
| 24 | 215,6 | 159,7 | 418,1 | 424,7 | 429,1 | 77,2 | 80,1 | 435,5 |
| 25 | 241,9 | 179,2 | 535,5 | 541,1 | 545,6 | 78,6 | 81,2 | 552,1 |
My 3cm HORN antenna is 11,1cm deep (calculated gain +-18,5dBd) but real gain is about 15dB due to not so precise construction..
Some YO friend asked me about polarization.
For new 3cm OK/OM hams: PSE read good article about rainscatter at http://www.ok2kkw.com/rs1999_jkt.htm
BTW I have shack in plastic cupola with minimal attenuation. If you want to try 3cm RS QSO from your room, don't forget to open window because of BIG ATTENUATION by glass!
more at http://ok1teh.nagano.cz/emepic/img_6224.jpg + http://ok1teh.nagano.cz/emepic/img_6225.jpg
This is the view from near house QTF 0º . Now you know, why i can't work DL1SUN, SM7ECM via RS in JO62 etc :-))
| Pretty
interesting map with marked precise range of the Rain Scatter-points in 8 &
12 000m ASL for OK1TEH's QTH in Prague. Note the yellow points which
are real scatter points used during my 3cm RS DX QSO abroad. Thank to map I
found that there are possibilities for 3cm RS QSO via SCP in central Poland
even with LY, UA2 and EW ;-) Just is a pity that map doesn't count with
trees and near houses. Map was used from http://www.heywhatsthat.com/main-0904.html |
View before of upcoming storm with my horn ant in shack QTF 270º
For full view of horizont from my shack click here.
HRD Beacons on 10 GHz in JO70FD (on 15dB horn) source-> internet QRG Call Loc Asl km QTF EIRP/pwr last hrd ------------------------------------------------------------------ 10368.040 OK0EL JO70SQ 1035 98 135/270 0.35 22-05-2007 10368.050 OK0EA JO70UP 1355 105 180/270 0.5 07-08-2009 10368.811 DB0ANU JN59GG 1100 299 Omni 5 27-06-2006 10368.835 DB0FGB JO50WB 1100 185 Omni 13 22-05-2007 10368.855 SR0WCK JO90NS 282 339 Omni 4.5 22-05-2007 10368.873 OE5XBM JN78DJ 980 195 Omni 10 22-05-2007 10368.813 OK0EW JO60OK 875 95 Omni 1.5 W 27-06-2009 10368.895 SR6NCI JO80JG 1150 167 Omni 1 22-05-2007 10368.973 OE2XRO JN67LA 3105 365 Omni 13 22-05-2007
