ATV @WW de:PE1DCD 15.09.95 00:53 0 9723 Bytes 3cmATV PA<->G report *** Bulletin-ID: 159501HB9EAS *** de PE1DCD @ HB9EAS.CHE.EU (Peter) to ATV @ WW I did make some mistakes in an earlier report in date, data and text. The next version is corrected. FM-ATV report of PE1DCD-P ------------------------- In the weekend of 19 and 20 August I was QRV on ATV at Strand (Beach) Slufter at the Maasvlakte, JO21AW, 20 mtr ASL, 25 km SW of Den Haag, on 24cm ATV and 3cm ATV. Our intentions were primerily to work stations on the coastline of England, Belgium, France and The Netherlands on 3cm ATV. The authorities gave us a place on a car-park, at the end of a road, just 100 mtr away a nude-beach (great place HI..). We had permission to stay the night too. On 24 cm I used 8 Watt, a 23 el. Tonna and a home-made RX of which the IF was too wide. This is my 3 cm ATV station: : V į¿ *1 : *2 *3 *4 ÉÍÍÏÍÍÍÍÍ» 25 mtr cable: ÉÍÍÍÍÍÍÍ»2560 McÉÍÍÍÍ»10.24 GcÉÍÍÍÍ» ºBaseBandÇÄÄÄÄÄįÄÄÄÄÄÄ:ĶPLL-OSCÇÄÄįÄÄĶ4 x ÇÄÄįÄÄÄĶ PA º ÈÍÍÑÍÍÍÍͼ : ÈÍÍÍÍÍÍͼ 10 mW ÈÍÍÍͼ 50 mW ÈÍÍÑͼ A į٠: ³1.1 Watt : 45 cm ÉÍÍÍÍÏÍÍÍ» : dish ºIsolatorº : 29 db ÈÍÍÍÍÑÍÍͼ V = video : 5ø (3db) ÄÄ¿ ³ A = audio : ³ ÉÍÍÍÏÍÍÍ» : ³ º SMA- º : 600W ³ ÚÄÄįĮÄÄĶ relay º : ERP ³ ÍÍÏÍÍÍÍÊÍÍÏÍ» º º : ³ ÍÍÑÍÍÍÍËÍÍÍͼ ÈÍÍÍÑÍÍͼ : ³ WG16 ³ : ³ ÉÍÍÏÍÍ» : ³ *5 º LNC º : ÄÄÙ ÈÍÍÑÍͼ V ĮĿ *6 :.......... ³ ÉÍÍÍÏÍÍÍÍÍ» ÉÍÍÍ» 25 mtr cable : 950-1750 MC ³ ºHM SAT-RXÇÄĶATTÇÄÄÄÄÄÄÄÄÄÄÄÄÄÄ:ÄÄ®ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ÈÍÍÍÑÍÍÍÍѼ ÈÍÍͼ : A Ä®ÄÙ ³ : ³LO RX (RXfreq + 480Mc): ÉÍÍÍÍÏÍÍÍÍ» : º Counter º *7 : ÈÍÍÍÍÍÍÍÍͼ : *1 Baseband with preemphase for video, audiosubcarrier on 6.5 Mc *2 Modified FM-ATV-TX 13cm DJ8ES 021 (UKW-BERICHTE 3/1993). *3 Multiplier G3WDG 001 (DUBUS 4/1993). *4 FET-PA DB6NT MKU102c. *5 Modified LNC RX:10.050 - 10.850 Gc (LO=9.1 Gc, nf ÷1.8 db). *6 Variable attenuator 6-60 db (because to much noise influences the PLL demodulator). *7 Presettable counter. (offset= +8620 Mc). Because attenuation in relay, semi-ridged and WG16-adapter the system- noise is 2.6-3 db (on WG16). A part of the multiplier (G3WDG001) is a cavity resonator. Because of the bandwidth (aprox. 60Mc/3db and 110Mc/6db) I can use it only on one frequency. On the WG16 was 800mW avalible. The group comprised of Gert-Jan (PD0MCL), his nephew Rikkert, my colleague Jaap (PA0PLC) and Leo, and Leo's son Laurens. Gert-jan's truck, used for transport, mobil shack and sleeping- place was a great help, also the generator (1kW) borrowed from my neightbour . Of course, we took too many things with us (double for spare), but I did not take that special audio-cable for my VCR and too little fuel for the generator. Another item of Murphy's Law:" When it works at home, it will not work elsewhere"; I was glad I had a 2nd pattern/call-generator with me. Visitors, family and friends were amazed at our contacts and the 40-bulb illumination in the evening; they supported us with cans of fuel. The weather was very good for going portable; temp. 28 degr.C, clear sky and NE wind of 3 baufort. Above the sea was a very low level of fog; on saturday it was more than on sunday. That weekend were extremly good conditions. Never had I seen so much radar on 24 cm. The number of English stations we heard on 2 mtr and saw on 24cm was higher than from the Netherlands, the reason for that could be our QTH as well as the antenna (most of the time) was pointed to England. On 24 cm FM-ATV we worked (1 or 2 way): PA0BOJ-P Jack JO11RN Westkapelle 58 km G8OZP-P Bob JO02TD Aldeburgh 167 km G4MLY Ian JO01BL Belvedere 275 km G7SQS ? G8GXP IO93FQ 423 km G8ONX Len JO03DD Skedness 287 km G4YTV Richard IO93UU Hull ? 360 km G4RNA Peter IO93FK Sheffield 412 km G1GST IO82WM Dudley ? 425 km G4EUF George IO92IQ Leicester ? 372 km ON5NY Walter JO10LV Passendale 138 km G6ZDB Gene JO93HC N of Derby 389 km PE1ECO-P Hans JO11RN Westcapelle 58 km G8VMP Keith IO91VO NW of London 295 km G8MNY John IO91XI Croydon ? 289 km G4GHD Garry Canvey Island 240 km ? G4LXC-P Peter Margate (JO01.. ?) 198 km ? G0VUN-P Trevor Margate (JO01.. ?) 198 km ? G4IYK Stewart Margate (JO01.. ?) 198 km ? G8IXC Paul JO01GI N Kent 250 km F5RZC JO10CQ Z of Duinkerk 189 km GB3LO repeater Lowestoft 155 km ? SRI for incompete/wrong calls, names, locators and QTH's. During this hectic event my notes in my LOG look a mess. But what about 3 cm ATV? Here it is: (P=picture, C=color, S=sound) PA0BOJ-P Jack JO11RN Westcapelle (beach) 58 km 250 mW (DRO), 60 cm Dish, I rcvd P5C-S5, I send P5C-S5 PE1ECO-P Hans JO11RN Westcapelle (beach) 58 km 250 mW (DRO), 60 cm Dish, I rcvd P5C-S5, I send P5C-S5 Hans and Fred (PE1EXM) on the same location like Jack but with other equipment. The did use a home-made mobile video- studio with (semi)professional video- and audio-mixers, VCR and several (color)monitors. I think I will save some money too! G8OZP-P Bob JO02TD Aldeburgh (beach) 167 km 150 mW (DRO), 1 mtr Dish, I rcvd P5C-S4, I send P5C-S5 QSB (weak) G8KBC Dave JO03DG Huttoft (2 km of coast) 293 km !! 1-way, 10db omnidirectional slot-antanna, I rcvd P4 QSB (strong) It took about a half of a hour before he could receive a good picture of me. I could not receive his 500 mW on 10.320 Ghz after a long time. I suppose his system-noise was better than mine. G4RNA Peter IO93FK Sheffield (387 mtr ASL) 412 km !! 1-way, 90 cm Dish, I rcvd P5 QSB (strong) after a long time. I could not receive his signal of 60 mW. Also his system-noise is better than mine (I think). G4LXC Peter JO01..? Margate (on the cliff) 198 km ? G0VUN Trevor JO01..? Margate (on the cliff) 198 km ? G4IYK Stewart JO01..? Margate (on the cliff) 198 km ? They did use the same eqiupment. 10 mW (Gunn) and a 45 cm Dish. I rcvd P5C-S5(?), I send P5C-S5 (QSB). Contacts with G3LSA, G0IIT and F5RZC were not possible on 3 cm. My conclusions: 1 The conditions are different during the day (in my case: the best in the morning and the evening). 2 There are QSB-periods, on greater distances stronger and capricous (ships on the path?). It could be necessary to transmit a long time before a picture could be seen on the other side. 3 I suppose there were at that time conditions. I have no contacts on other days to compare with. It could be interesting to analyze it with waether-data such as: air- and water- temperature, wind, visability, temperature-inversion, air-pressure and moisture of the area of the Northsea. I can not get this data. To those who like to be more succesful I have some hints: 1 Be sure of a good frequency-readout of your receiver. You can adjust the LO of the modified LNC with a counter and a source ( 8th harmonics of 1280 Mc). 2 Be able to find your transmitting-frequency as accurately as possible (within 5 MC). 3 Determine your position in degrees or your Maidenhead- locator, so you can calculate the bearing and distance. 4 Be sure of a good "degree" readout of your rotor or tripod. You can buy an arch-bow of 360ø ( Rotring artno:821424) and fix it on the tripod. You can calibrate it by receiving the lowest frequencies (Hor.pol.) of the Astra-sattellite (eg 10.714 Gc= Arte) according your position on the globe. Remember, a 45cm dish has a 3db angle of 5 degree. In that case you should be within 5 degree accurate. 5 It is very useful to be able to receive other audio-subcarriers such as 5.5 , 6 and 6.5 Mc. 6 In the Microwave Handbook (RSGB), volume 2, page 10.43 and 10.44 is a useful but simple circuit drawn of a AUDIO-VCO. It is coupled on the AGC of the sat-receiver; the higher the tone the stonger the received signal. Work as accurately as possible. You are looking for the well known "needle in the haystack" when a station say :" Our QTH is "kjdejbpeea" (location ??) , the frequency is about 10.250 Gc and the dish is about in your direction". When you have strong QSB-periods, the TX frequency is 50 Mc away of which is giving and you cannot find the correct direction (and he is too), then you have a problem ! I am looking forward to the next event with 3 cm ATV. Good luck with your 3 cm experiments. Sorry for my ugly English. '73 Peter, PE1DCD @ PI8HWB.#NBW.NLD.EU