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  The Lowdown 630 Meter Antenna for Amateur Radio

Model 630.PD
630 Meter Antenna

Customer Reviews
February 2023
“I think you've created the ONLY plug-and-play 630 meter antenna out there."
Jamie Labadia, N2VJ
Windham, NY
April 2023
“Pretty impressive for such a small antenna." See the case study.
Tom Costa, N9RU
Marion, IL

The Lowdown Amateur Radio Antenna offers amateur radio enthusiasts a convenient way to operate on 630 meters in a confined area. Designed to be centered above a horizontal groundplane, this "HOA-friendly" antenna is amazingly compact and lightweight, making it simple to set up, take down, transport and store. Its center-loaded, base-fed design and capacitive top hat yield excellent efficiency given its compact size. Accessories such as insulator mounts, matching transformers, junction enclosures and preassembled groundplanes are available as well.

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email or call us directly at 616.772.2300 x102 (9-5 eastern).
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Antenna Specifications *  
  • Type: LF base, vertical, whip, omnidirectional.
  • Impedance: 20-33 ohms with 25’-10' radius groundplanes, respectively.
  • Matching: Transmission line transformer may be used to match impedance for best efficiency.
  • Efficiency: up to 3.0 %.
  • Power rating (approx.): 200-watt carrier.
  • Frequency coverage: 472 – 479 kHz (630-meter band).
  • Operating height AGL: 24’ nominal.
  • Assembled length: 21.54’.
  • Element diameters: base: 1.5”; coil: 3.75”; midtip/tip: 1.5”/1.0”.
  • Capacitive hat: 120” diameter (maximum).
  • Breakdown: 4 pieces plus 6-element capacitive top hat, longest element 94”.
  • Tunable adjustments: capacitive top hat diameter (whip length).
  • Weight: 18.9 lbs.
  • Material: aluminum (anodized), fiberglass reinforced PVC.
  • Hardware: stainless steel.
  • Feed line connector: ¼” screw stud.
  • Mounting type recommended: 1.5” Insulated, block mounts.
  • Mounting format: top of mast or pole.
  • Mounting structure: 4” pole, 4’ height (typical).
  • Wind surface area: 3.15 square feet.
  • Wind survivability rating: 140 mph guyed; 100 mph unguyed (48” mount separation).
  • Bandwidth: 6 kHz (3:1 SWR); 4 kHz (2:1 SWR).
Optional Accessories

*) Specifications are subject to change without notice.

Click map to enlarge it.
The Lowdown 630 Meter Antenna Testing Map

Contacts & Reception Reports from the 'The Lowdown' Antenna Testing
February, 16, 18 and 25, 2023

630 Meter Antenna Full View 
The above support stand shown with the antenna is a future option.
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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Email Form

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Information Radio Station is a generic term synonymous with Travelers Information Station (TIS), Highway Advisory Radio (HAR) / Highway Information Systems & Low Power Radio Stations (LPR). Operation of the stations is governed by FCC Part 90.242 Rules. A FCC license is required. Information Radio Stations may be fixed or portable. Subcomponents may include transmitter, antenna and ground system, digital voice player, wattmeter, cabinet with conventional or Corbin locks, lightning arrestors for RF, power and telephone lines, coaxial cable. Most stations employ black maximized antennas to discourage ice accumulation and security measures to prevent unauthorized program access. Options include synchronization, battery backup, solar power, remote programming by local, network or telco, multi-station audio distribution via RF or LAN / WAN or wireless network.