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Beverage antenna & K9AY Loop

Like every big contest station at PI4DX we do have several receiving antenna systems. We use beverage antennas to several directions, a K9AY loop and even a low dipole for 28 Mhz.

To switch the antenna the operator likes to use we have purchased a 2x8 switch from K9AY. This antenna switch makes it possible to use 8 receive antenne connected to 2 radio at the same time. For 80 & 160 meter we have an option installed with a pre- amplifier and a bandpassfilter wich the operator can switch on and off.

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 So every operator has his own console box to switch to the antenna he likes

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 But during the CQWW 2013 contests we discovered all receiving antenna did not peform like before. We checked the switch box and founded a "few" components wich were faulty.

040611 IMG 6604 407 Original

 We even had to make new coils. Probably this all was caused by lightning

Coil Foto 2

 We use an old Marconi 2022 to check the switch

Marconi Foto 4

Here the open antenna box after repair. We were surprised that there is no coax cables used inside but K9AY told us it really makes no difference.

Box Foto 4

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