Напрашивается новая тема, по идее, стоило Александру RN3AUS передать честь ее создания...
http://136.su/index.php/topic,18.msg31862.html#msg31862Еще над этим работает Лиус EA5DOM:
Hi LF
I have been running the QRP beacon in 137.484 almost continously during last months. The power consumed is very low and the Arduino + Si5351 runs all the FST4W modes + WSPR2 every hour. Even in this summer solstice season it is very interesting to compare performance of the different modes
Special thanks to DL0AO team, as they run decoders in ALL this modes. So it is possible to compare them
This are the results of last night shorted by distance and filtered by unique monitor stations
FST4W-1800 shows as the best mode for long distances, but the 900 variant is quite close. See the results at SV8RV (2x1800 and 1x900)
M0LMH is monitoring 900 and 1800 mode. Wsprrnet sometimes reports it as Mode2 and others Mode15. But I transmit 900 at 30 minutes pass the hour
DL0AO decodes FST4W at 1800, 900 and 120. But also at WSPR2. But I must say that WSPR2 and 120 frames are transmitted more than once
every hour. This modes are transmitted from minute 50 to 59 at a rate of 3x120 and 2xWSPR2. So, they have more chances to be decoded
DF6NM got 3 decodes at 1800, but Markus is only decoding that mode
OE9GHV seems to be decoding just WSPR2. Only one decode
HB9TMC is reported as decoding mode 1800, but he is also decoding mode 900 with the same callsign. That's why he got 9 reports over night
when nights now don't provide 9 hours of good conditions in LF
I plan to keep the beacon as long as possible. And may be increasing power a bit. But actually the low power and great gain of the 90m vertical
makes an outstanding combination. Other option is to combine Tx with Rx periods. That would need sacrifiying mode 1800 and use 900/300/120/WSPR2
Or just do it reverse:Tx just at 1800
Make your bets ;-)
73 de Luis
EA5DOM
По сей тематике давайте писать здесь.
Чтобы не терялось в недрах темы "Сегодня в эфире".
Забавно, что как с историей с изобретением телефона, например, два человека не сговариваясь стали заниматься таким делом одновременно!
Стало бы, пришло время подобных технических решений.
Ноосфера, о которой писал В.И. Вернадский - все же существует!
Для такого дела - неплохо бы и сеть приемников иметь 24/7 для приема сигналов этих маяков.