[TowerTalk] Ameritron RCS-10 Coax Switch

[Dr. James C. Garland]

I  believe the resistors are to discharge static electricity on antennas
that are not grounded to DC. Without it voltages in excess of 1 kV can build
up on the coax inner conductor. The resistance (100K) is high enough that it
won't have any impact on the electrical performance of the antenna, which is
nominally 50 ohms.

Jim W8ZR 

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Doug Renwick
Sent: Monday, November 26, 2007 6:32 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Ameritron RCS-10 Coax Switch

Anyone familiar with the Ameritron RCS-10 remote antenna coax switch?  I
am interested to know the design purpose(s) for having a 100K ohm 1 watt
resistor (in most cases) between each (8) SO-239 center pin and ground
in the relay box?  This resistor is not shown in the manual schematic.

Doug