Topband: Commond mode choke for Beverage

[Eduardo Araujo]

>> With these ferrites I ask the same question, should I put the choke close
>> to the 9:1 Balun or near the switching box and how many turns? some bevs
>> have the feed point at +- 60m away from the switching box.

My two cents......It was interesting during the installation of the last beverage, we have only #31 core, so we placed it at the receiver side. Disconnecting the coax at the bev feed point and shorting the coax there, many AM broadcast stations could be heard and some of them strong, indicating that even though one choke was at the receiver side the coax was acting like an antenna. The coax was just lying on the ground and is 40/50 mts long. 
When we got more cores and placed one choke at that place close to the short, repeating the test before and after most broadcast vanished and only one could be heard very week.'73.... Eddie, LU2DKT