Home |
Search |
Today's Posts |
#1
![]() |
|||
|
|||
![]()
Having but recently returned to the world of shortwave radio, I'm
trying to be better informed about technical and safety issues than I was as a kid. Now a homeowner with a mortgage and a homeowner's insurance policy, I'm worried about lightning protection. I'm receiving only, not transmitting. I have a ground rod just outside the window where the antenna wire enters, and I intend to disconnect the antenna outside the house when I'm not using the shortwave. But I want to be extra careful! So I'm considering some options. Which make sense to you seasoned hams? Do any of these leave me open to my homeowner's insurance being voided if I get a direct hit by lightning? _____________________________ I ordered this before I read the disclaimer: just "better than nuthin?" http://www.universal-radio.com/catal...tect/4618.html The Opek A7516 Lightning Arrestor is not the "state-of-the-art" in radio protection. These "air gap" arrestors were OK for tube sets, but are not the best for today's solid-state rigs. However, if you are on a budget, this device is a whole lot better than nuthin! As with all lightning protection devices; you must connect it to an earth ground with thick ground wire, and it is not going to provide protection in the event of a direct hit. _____________________________ So, here's a better gas-discharge arrestor: http://www.universal-radio.com/catal...tect/5611.html The LDG SP-200 surge protector operates from DC to 1500 MHz with a 200 watt power capacity. The SP-200 protects coax feedlines from surges exceeding 230V, such as caused by nearby lightning strikes and static build-up. The SP-200 employs a gas-discharge tube that arcs-over when 230VDC is exceeded between the RF center pin and shield connections. _____________________________ A variation, with different connectors: http://www.radiolabs.com/products/an...protection.php Ultra Fast Gas Discharge 0.4db Max Insertion Loss 350V or 90V Breakdown Voltage VSWR Better than 1.5:1 Passes DC voltage 200W Operation _____________________________ This doesn't say if it uses gas or air: http://www.jetstream-usa.com/instructions/jtla1.pdf # Model # JTLA1 # 1.5-200 Mhz # 50 ohm # 8 kW PEP, 4 kW DC # Insertion Loss: Less than .1db # Surge Current Capacity 20,000 Amperers # VSWR Less Than 1.1:1 @ 1000Mhz # Voltage Attack Time: 0 to 10 Billionths of a second _____________________________ Can I use something like this? It's designed for fences, but could easily be rigged for an antenna input: http://www.zarebasystems.com/store/e...ccessories/la1 Protecting the fence charger from lightning strikes on the fence line. This lightning arrestor creates a path of least resistance, diverting lightning surges to the ground. _____________________________ What's going on here? http://ku5e.com/index-59869.html The lower picture shows a device mounted atop the ground pole. Do you recognize it? _____________________________ Rees Chapman Dahlonega, GA |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
World Lightning Map & 5-Year US Lightning History Map | Shortwave | |||
Lightning Arrestors Question | Antenna | |||
Where to order Polyphaser lightning arrestors? | Antenna | |||
Dead Serious T2FD: HV Insulation, EMP Arrestors, extra Coax Choke? | Antenna | |||
FA Lightning arrestors - HF and UHF | Swap |