Paul, LF, 
 
Which gain can be achieved with accuarte coupled multi loop receiving antennas? 
 
You told us you have a RX antenna out of  2 loops, coupled in a special way.
 
Is it possible to built a loop that has even more gain, such as e.g. a 4ele 
cubical quad on HF?
 
And makes it sense to try to receive with the 100m vertical? Sure, the levels 
will be not to weak but the SNR?
 
73, Stefan/DK7FC

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