It seems that nowadays there are many who believe that remote reception was used by others when they were not able to work a dx station.
http://k9la.us/160m_Ducting_and_Spotlight_Propagation_revA.pdf 73 Peter, DJ7WW -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of uy0zg Sent: Freitag, 13. Juli 2018 22:38 To: GEORGE WALLNER Cc: [email protected]; [email protected] Subject: Re: Topband: KH1/KH7Z TopBand Ops Brief OK, I believe in your RX, George 73 Nick, UY0ZG Details UY0ZG C6AGU 2008-02-20 03:36:00 160M CW 1.80000 BAHAMAS Selected 160M; Challenge Details UY0ZG C6AGU 2011-01-28 04:54:00 160M CW 1.80000 BAHAMAS 160M; Challenge Details UY0ZG C6AGU 2011-01-28 05:27:00 160M CW 1.80000 BAHAMAS 160M; Challenge Details UY0ZG C6AGU 2011-01-29 05:03:00 160M CW 1.80000 BAHAMAS 160M; Challenge Details UY0ZG C6AGU 2016-01-31 01:03:00 160M CW 1.80000 Details UY0ZG C6AGU 2017-01-26 04:21:00 160M CW 1.80000 Details UY0ZG C6AGU 2017-01-28 01:57:00 160M CW Details UY0ZG C6AGU 2017-11-23 04:58:00 160M CW 1.80000 Details UY0ZG C6AGU 2018-01-25 03:18:00 160M CW 1.80000 Details UY0ZG C6AGU 2018-01-28 02:14:00 160M CW 1.80000 GEORGE WALLNER писал 2018-07-13 22:33: > Dear OM, > > The ones I have worked, I heard their signals, and they are in the > log. That's real. > > George, > > AA7JV > > On Fri, 13 Jul 2018 10:23:19 +0300 > > uy0zg <[email protected]> wrote: > >> "> and Ukrainian stations also logged. (Remember, this was in >> July!)" >> >> Hi George ! >> >> UY5VA and US4EX - tven in winter and summer they listen only on the >> Internet ! >> >> They do not have receiving antennas. >> >> QSO with Ukraine are not real. >> >> 73 !UY0ZG > >>> andUkrainian stations also logged. (Remember, this was in July!) > >> GEORGE WALLNER писал 2018-07-13 05:19: > >>> Dear Top Banders, >>> >>> Here is a brief descriptionof the recent Baker Island (KH1/HK7Z) >>> >>> 160-meter operation. >>> >>> Among the numerouslimitations the USFWS placed on us, being only >>> >>> allowed on the island in June was the most onerous. A long way >>> from >>> >>> ideal from a low-band point of view, but we were determined to >>> make >>> >>> itwork. The result was over 1500 QSO-s on Top Band. >>> >>> Transmit Antenna and Gear: >>> >>> The location of the 160 m TXantenna was close to the north-west >>> corner >>> >>> of the island, but not as far north and clear of the land as we >>> would >>> >>> have liked it. Also, we were not able to place our TX antenna >>> fully >>> >>> inthe water, due to the pounding surf. (Which did destroy our 80 >>> m >>> >>> antennathe first night.) Instead, the 160 m TX antenna stood just >>> at >>> >>> the high tidewater-line, with the metal base buried in wet sand. >>> At >>> >>> low tide the antennabase was 30 feet from the water’s edge, but >>> >>> fortunately the sand below theantenna was always saturated with >>> >>> salt-water. Luckily, the tide was mostly uparound the times we >>> were >>> >>> working NA on TB. We were only allowed a maximum antennaheight of >>> 43 >>> >>> feet. To meet this requirement, we designed a “fat” 160 >>> mvertical, >>> >>> which had three vertical wires, two of them on spreaders to make >>> >>> theapparent diameter of the vertical conductor larger. The >>> antenna >>> >>> also had two12.5 m top-loading wires, which sloped down at >>> 45-degrees. >>> >>> The antenna had 8 radialsof various lengths, with three of them >>> going >>> >>> directly into the salt-water. Takeoff to the west and north-west >>> was >>> >>> clear over open water, but to thenorth-east (towards NA) it was >>> over >>> >>> land, with a 20’ high sand berm directly inthe way. The antenna >>> was >>> >>> fed via a remote-controlled coupler. I want to pointout that even >>> this >>> >>> simple, and far less than ideal, arrangement took atremendous >>> effort >>> >>> to build, as we had to haul the all the gear for the CW tentabout >>> ¼ >>> >>> mile from the boat landing, working in 100 degree heat under >>> >>> theEquatorial sun. Transmitter power was around 800 W (but >>> >>> occasionally reduced400 W to leave more generator power for the >>> other >>> >>> bands). The radio was a K3S. >>> >>> Receive Antenna: After thesecond night of operation we built a 60 >>> foot >>> >>> long DHDL facing north-east. Theantenna had a high-performance >>> >>> filter/pre-amplifier. After the fourth night weadded a second >>> DHDL >>> >>> that faced towards Europe. >>> >>> We were expecting easyconditions for JA (who were closer) and >>> >>> difficult for NA. We got the opposite.The band would open to NA >>> soon >>> >>> after our sun-set (around 18:00 local time) withvery little >>> noise. NA >>> >>> callers were initially weak but easy copy. Noise wouldstart >>> rising >>> >>> about two hours after sun-set. Fortunately, that was about >>> thetime the >>> >>> gray-line was reaching the East Coast, which brought up the >>> >>> signalswell abov e the noise. Some East Coast signals were quite >>> loud. >>> >>> As the eveningprogressed, noise continued rising as more of the >>> >>> equatorial thunderstorms toour west came under darkness. By the >>> time >>> >>> the JA-s would show up (about 5 hoursafter our sun-set) noise was >>> way >>> >>> up, and receiving conditions were becomingdifficult. Still, some >>> West >>> >>> Coast stations kept coming in strong, well over thenoise, and >>> quite >>> >>> able to work among the numerous JA callers. Occasionally, wehad >>> to >>> >>> listen up for NA above 1825.00 to avoid the JA QRM, but on the >>> long >>> >>> runthat proved to be unnecessary. Overall, working NA was a >>> pleasure, >>> >>> whileworking JA (and SE Asia) was a pain due to the noise. By >>> midnight >>> >>> local timethe lightning crashes on the TX antenna were becoming >>> >>> painful. Later, the DHDLRX antennas would help, but even then, >>> many >>> >>> signals were a better copy on theTX antenna. Almost every call >>> was >>> >>> different, some would be strong and clear onthe TX antenna, while >>> >>> others could only be copied on the RX antenna. There wasalso a >>> large >>> >>> variation in RX conditions from night to night. On our >>> secondnight the >>> >>> noise was much higher than on the first night. Also, as we >>> wereworking >>> >>> progressively weaker stations, things were getting harder. >>> >>> Although we knew that thechances for working western EU were >>> basically >>> >>> nil, we made a big effort to workas far west possible. On most >>> >>> mornings the noise was just too much to copyanything below S7. A >>> few >>> >>> nights, however, conditions were favorable, and we gotas far as >>> >>> European Russia. Conditions were the best on our last night, >>> whenjust >>> >>> at sunrise we got as far west as Serbia, with numerous Russian >>> >>> andUkrainian stations also logged. (Remember, this was in July!) >>> >>> After operating 7 straightnights on 160, my ears were ready for a >>> >>> break. We switched to FT8 for about 5hours, using the regular QSO >>> mode< p> (not hound-and-fox). With N1DG operating, wemade about >>> 120 NA QSO-s in >>> >>> about 5 hours! Just before midnight, we switched backto CW for >>> the >>> >>> JA-s, who are not allowed to operate FT8 in the lower part of >>> theband. >>> >>> The FT8 operation revealed three things: There is serious demand >>> for >>> >>> FT8on TB, the mode gets through the noise very well and gives >>> modest >>> >>> stations achance to work serious DX on TB, but it is easily >>> dominated >>> >>> by the strongsignals. >>> >>> An interesting lesson fromwhat happened to our 80 meter antenna. >>> >>> Initially, it stood on a sturdy metalbase in the water. During >>> the >>> >>> first night we had a storm and the surf broke upthe base >>> (snapping ¼” >>> >>> bolts like they were matchsticks). The surf knocked theantenna >>> down >>> >>> and soaked the tuner with salt-water. The next morning, we >>> rebuiltthe >>> >>> antenna further up the beach, but without the metal base which >>> >>> originally connected it to the salt-water ground. Although we >>> added a >>> >>> good number ofradials, performance was poor, especially when >>> compared >>> >>> to the 160 m antenna,whose metal base was in contact with the >>> >>> salt-water below. >>> >>> The key lessons learned: >>> >>> 1. 160 m DX is morethan possible in June and July. >>> >>> 2. For good results, you mustbe on the band every night, >>> otherwise you >>> >>> may miss that special night when theconditions line up just >>> perfectly. >>> >>> 3. A salt-water ground helps,and where possible, vertical >>> antennas >>> >>> should stand in the water. Being up thebeach is not the same. >>> >>> 4. RX antennas are needed towork the weaker stations. >>> >>> 5. DXpeditions should have astation dedicated to 160 m (at night) >>> with >>> >>> operators who want to work 160. >>> >>> 6. FT8 is now part of AmateurRadio, even on TB. >>> >>> Happy DX-ing and 73, >>> >>> George, >>> >>> KH1/KH7Z (AA7JV) >>> >>> _________________ >>> >>> Topband Reflector Archives - http: //www.contesting.com/_topband >>> [1] > >> -- >> >> _________________ >> >> Topband Reflector Archives - http://www.contesting.com/_topband > > > > Links: > ------ > [1] http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
