[TowerTalk] static drainage
Chuck Counselman
ccc at space.mit.edu
Mon Jan 27 08:58:03 EST 2003
At 7:59 AM -0500 1/27/03, Pete N4ZR wrote:
>...is it worthwhile to install 1.5 megohm resistors inside the relay
>boxes across each antenna jack, as is done in the Heathkit switch,
>presumably to drain static electricity?
Yes, very much so! An antenna (or part of an antenna, such as
one-half of a dipole connected to the center-conductor of a coaxial
feedline) left floating very easily acquires a (literally) staggering
electric charge, more than enough to blow a receiver front-end.
Probably you should also have a lightning protector in the feedline
from each antenna.
-Chuck, W1HIS
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