ad7i (11/16/82)
qst de w1aw hr propagation forecast bulletin nr 46 from arrl headquarters newington ct november 15, 1982 to all radio amateurs bt the solar flux rose from 139 november 5 to 168 on the 12th. in the same period of the previous solar rotation, beginning october 8, the flux dropped from 137 to 131. values have been higher than in the previous rotation for ten consecutive days, and are expected to remain so for a few more. solar activity dropped off slightly on the 13th and 14th, but is expected to rise again through about the 21st. based on current solar observation, the outlook is for mildly disturbed conditions in the hf range november 15 through 17. propagation will improve and the muf will be higher november 18 through 22. the 50 mhz band has been open east and west in the lower latitudes, and on transequatorial paths almost daily since late october. if there is to be high latitude east west communication over long distances on 50 mhz this autumn, it will happen after about the 18th, perhaps for the last time in this solar cycle. hf conditions will be more erratic november 22 through 30. propagation below 30 mhz will be generally good in early december. american sunspot numbers for november 4 through 10 were between 60 on the 5th and 88 on the 10th, for a mean of 76. they will average slightly higher this week ar
ad7i@houxp.UUCP (11/21/83)
qst de ad7i hr propagation forecast bulletin nr 46 from arrl headquarters newington ct november 14, 1983 to all radio amateurs bt during early november the solar flux rose gradually, to 111 on the 7th. it then turned downward, reaching a low of 92 on the 12th. it went up two points the next day, but visual observation of the sun has not indicated that any major upturn is imminent. frequent geomagnetic disturbances beginning the 8th, and still with us as this bulletin was issued, are expected to clear by the 15th, bringing generally good propagation on all dx frequencies november 16 and 17. a longer stable period is expected about november 21. higher solar activity and an unstable magnetic field will degrade conditions during the 24th and for most of the balance of november. the solar flux has been lower than at the same time in the previous solar rotation since october 20. this will be the expected condition more often than not for the next three years or so, but there will be exceptions, usually brief. the 21 and 28 mhz bands have been very good at times this month and they will be useful fairly often through at least the next year. american sunspot numbers for november 3 through 9 were between 42 and 94 with a mean of 62.9 ar