Соберу сюда позже ссылки на эксперимент Николая UA3DJG, Александра RN3AUS и остальную информацию разбросанную по форуму.
А пока прочитал в новой RSGB о вот таком эксперименте OK8LEO:
My wspr -2 is on mf freq 474.200 kHz I will keep it running till tomorrow morning on 200 milliwatts
OK8LEO
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Hello Leo.
No luck receiving you last night but I did see you managed 3 reports from OK0BVG and DL0AO. Well done.
I see from the WSPR reports you are transmitting power level as 500mW but the reports are -28 / -30 from under 300km.
Is this 500 / 200mW EIRP or TX power? ( WSPR usually shows power as EIRP to account for TX antenna efficiency)
Looking forward to hearing you / having a QSO when you get the 5W PA running.
73
David G0MRF
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OK8LEO:
Hello David
thanks for your email
It is 200 milliwatts Tx output into 100 meter coax cable with 3db loss
This goes into unun (1 :40 ) and connected to an horizontal L shape antenna 1. 5 meters high 130 meter length (in total)
This is just a try but I am happy that the VSWR = 1.38
Aslo noticed that more OK stations are tuned in .
Looking forward to see the improvement with 5 watts
Have a nice day and stay save
Leo, OK8LEO
Впервые на ДВ-СВ вижу применение широкополосного трансформатора и питание по типу end-fed.
