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Tuesday, February 19, 2019
Mysterious Phenomenon on Topband?
I noticed this mysterious Phenomenon on Topband this week (1.-3.2.19) during FOC Marathon...
Fast echo appeared during my transmit morning at 04:00Z.
US sigs came thru really strong on 300m Beverage .
North EU sigs came with strong fluttering.
It appeared on both NA and AS Beverage.
Nothing like that happened on 80m at that time as I switched from 160m to 80m for few minutes and nothing heard over there.
As you can hear the fast echo is so strong that it makes QSK useless... Switching in between both Beverages did not make any changes.
At 05:30Z it disappeared.
Beverage to NA > 310deg, 320m long at 180cm ended with 490Ohms.
Beverage to AS > 70deg, 320m long at 180cm ended with 490Ohms.
Inverted V at 30m for TXing.
I will be happy for any ideas, hints, theory or opinion.
Also you experiences are welcomed.
73 - Petr, OK1RP