I have an elevated vertical standing about 75 tall - with 10 elevated radials at about 8. I need to ground the beast somehow for lightning events. Theres a shunt coil between the vertical element and
Yep, a ground rod or two just like a tower ground would do fine. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://wiki.k1ttt.net AR-Cluster node: 145.69MHz or telnet://k1ttt.net I have a
NO! The work of Rudy Severns, N6LF, on the topic of elevated radials shows that elevated radials should NOT be grounded, because doing so causes radial currents to be unbalanced, which increases loss
On 2/8/13 10:36 AM, Jim Brown wrote: On 2/8/2013 5:52 AM, K1TTT wrote: What is the best way to ground this antenna? Can I put a few ground rods at the center base and run them up to the radial juncti
Spark gap it is, then... Thanks for all the suggestions. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie On 2/8/13 10:36 AM, Jim Brown wrote: On 2/8/2013 5:52 AM, K1TTT wrote: What is the best w
Could he not also ground through an rf choke to bleed off static? Mark N1UK Spark gap it is, then... Thanks for all the suggestions. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie On 2/8/13 10:
At first that's what I thought, but OP was looking for lightning protection. And, if you wanted to operate top band, for instance, a choke that has high Z at 2MHz is also going to have high Z for lig
Static bleed is not an issue here, sort of. The antenna is grounded through the antenna switch which has a 50 ohm load on the line when it's not selected (unless that's been zapped). And when the lin
Why not an RF choke for static drain/noise purposes across a spark gap for direct hit purposes ? Gene / W2LU At first that's what I thought, but OP was looking for lightning protection. And, if you w
On 02/09/2013 07:34 PM, Jeff Blaine wrote: Static bleed is not an issue here, sort of. The antenna is grounded through the antenna switch which has a 50 ohm load on the line when it's not selected (u
dualband 80/160 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie On 02/09/2013 07:34 PM, Jeff Blaine wrote: Static bleed is not an issue here, sort of. The antenna is grounded through the antenna
Lighting is NOT a DC event, it is an RF event. Chokes block it (until they fry). Not a solution. As AC0C noted, the coax is grounded at the house/shack, as it must be, which provides a DC path anyway
There are two elements to the protection. First, the coax shield is bonded to the panel and from there to the rest of the ground system. Second, the gas tube shorts the center conductor to the shield
73, Jim K9YC Isn't part of the Polyphaser lightning protection circuit a spartgap? I opened one up and thought I saw a gas tube. yes, a gas tube is basically a calibrated spark gap that fires at some
On 2/10/2013 3:11 PM, Jim Brown wrote: There are two elements to the protection. First, the coax shield is bonded to the panel and from there to the rest of the ground system. Second, the gas tube sh