Innovative Low Loss Coax Surge Protectors for Broadband Wireless Applications

Specialized Designs for Amateur, Point to Point, PCS, Cellular, Military/Government, WLL, LMDS, and Mobile Systems

In a study under the auspices of the U.S. Dept. of Energy, utilizing the satellite FORTE, launched in 1997, carrying VHF lightning dischargesensors, it was determined that there can be damaging lightning energy emissions throughout the 30 thru 300 MHz VHF spectrum. Before FORTE, it was thought most lightning energy emissions were primarily in the VLF range. Therefore the damage threat can be anywhere from VLF thru VHF.

Through the careful design of our ARC-PLUG (tm) gas tube module and precision constant impedance thru-line, allowing proper firing characteristics, our devices are designed to provide effective protection through out this entire spectrum. Other surge protector designs may only utilize simple VLF filters with no gas tube back-up.

TT3G50 Installed on a Ground Buss

Proper installation and single point ground system for the Model TT3G50 Surge Protector.
Photo courtesy Sheldon, WA6KJN, taken before sealing connectors

  • Excellent broadband performance from DC thru 3 GHz, compared to the narrowband DC blocked or stub designs. Typical dB loss: 0. 1 @ 1 GHz; 0.2@ 2 GHz; 0.5@ 3 GHz.
  • Innovative impedance compensated thru-line cavity design allows control voltages to pass thru the device, instead of the "wire around" requirement of DC blocked designs. Our design allows "in-circuit" cable sweeps.
  • Innovative fast acting gas tube replaceable ARC-PLUG module can be removed and replaced in the field in about one minute with no tools required, and without having to remove the protector from the circuit. The "O" ring sealed knurled knob does the trick!
  • The ARC-PLUG module and connectors are "O" ring sealed for complete weatherproofing
  • Effective performance. Due to our carefully designed reactance compensated thru-line cavity and ARC-PLUG (tm) module placement, our customer and government test approvals show our design is as good as, or better than, DC blocked designs.
    DC blocked designs require the entire unit to be discarded if hit with a surge beyond ratings. They are not field repairable. Our design simply requires the ARC-PLUG (tm) module to be replaced in the field. No tools required.
  • The Defense Logistics Agency (DLA) has assigned National Stock Numbers (NSN) to the Model TT3G50 Coax Surge Protector (NSN 5920 01 5470278) and the 3G50 ARC-PLUG (tm) cartridge (NSN 5325 01 5466841). This is a result of extensive testing and approvals within the military organizations.

Customer Reviews

"Just wanted to share my DXCC , in the second worst FEB on record in RI I live in Barrington, and this is a picture of the alpha delta with 30-55 mile an hour and gusts and lots of snow! THANK YOU for one of the best pieces of ham gear I own"

Thank You,

Brian — 73'

"My DXEE in inverted V form, coupled to my old Icom 746Pro and my ALS-600, continues to make me very happy.
I fired up the station last night here in central Florida. Fairly high noise levels everywhere. Not a lot of activity in general.
After working a few US stations, a few South American stations, and a guy in Switzerland on 40, I was about to power down… well, maybe just one more sweep of 20 meters. Most of what activity there was was there.
Nothing really of interest. Couple of nets having trouble connecting. Here’s a guy… let’s see… sounds like KG4 A something. He’s not using phonetics. Oh, Guantanamo Bay, Cuba. Worked a few guys there already. He’s about 5-7 with lots of guys calling him.
But there’s something about this guy. What the hell, I’ll listen a while.
Sounds like KG4 A A something. Some QSB and rude callers making things difficult. At least he’s holding steady at 5-7.
Then he gives his call in phonetics. KC4AAA — Antarctica! And not just anywhere in Antarctica but the South Pole itself! The Amundsen-Scott South Pole Station! Holy shit!

As I said, everybody on the planet is calling this guy, and some are not being very courteous about it. Big surprise. I start calling, too. Four calls, five calls, six calls…
“Who is the station ending in X-ray?” that could be half a dozen stations, but it could be me! I call back.
“Station ending in Kilo Bravo X-ray ONLY — please call again.” So I do.
“Listen, Romeo Delta something, please standby and wait your turn. Kilo Bravo X-ray, please try again!” And I do.
“OK, gotcha in the clear that time, Whiskey 4 Kilo Bravo X-ray. You’re 5-9 at the South Pole!” We exchange names, I give him his 5-7, and I get out of the way.
During all my pre-call listening, I heard him give out many reports lower than 5-9, so I tend to believe him about mine. The kilowatt and a half boys must have been green with envy. 5-9 into Antarctica on 20!
The Amundsen-Scott South Pole Station! A 5-9!

Richard Kunc - W4KBX