Topband: Beverage feeding

[Stein Roar LA6FJA-K3RAG <s-roabr@online.no>]

Hi 

I wonder how much difference it is if I have antenna switch for different RX 
Antennas in the field with 300 ft. 50 ohm coax, and then I take a 300 ft 75 ohm 
to my beverage feeding box from DX Engineering....

Does this change of coax impedance mess up the RX signal even I use a preamp 
??? Or should I go straight with 75 ohm from the shack down to the switch.???

73 LA6FJA Rag 

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UR RST IS ... ... ..9 QSB QSB - hw? BK