----- Original Message ----- From: "David Wing" david@cdwing.com To: amsat-bb@amsat.org Sent: Tuesday, November 10, 2009 7:09 PM Subject: [amsat-bb] Yagi balance point
I have two yagis that I need to mount a little off center and wanted to
put
a little weight on the back of the antenna as a counter balance.
Assuming the counterbalance will need to go in front of the rearmost reflector, does it matter if the counter balance is metallic (i.e. some fishing weights)? Should I isolate it from the boom? Should I use something ceramic instead?
73
David
K6CDW
Hi David, K6CDW
Both for the KLM 2M-14C and KLM 2M-22C I suggest you to remove the rear reflector and put into the boom a counterweight made with a long piece of steel rod or lead rod if you prefere having the same inside diameter of the boom and the right weight to balance the antenna. The lenght of the boom between the rear reflector and the rear dipole is more than enough to get the needed counterweight. Drill a hole into the boom and slip into it a bolt passing through the conterweight and put again the reflector into the original hole.
73" de
i8CVS Domenico