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  The Lowdown 630 Meter Antenna for Amateur Radio
Model 630.PD
630 Meter Antenna

Customer Reviews
“Information Station Specialists has designed an antenna that permits those of us, with smaller lots and nearer neighbors, the fun of working 630 meters."
See a case study.
Ralph E. Taggart, WB8DQT
Mason, MI
“Pretty impressive for such a small antenna."
See a case study.
Tom Costa, N9RU
Marion, IL
“I think you've created the ONLY plug-and-play 630 meter antenna out there."
Jamie Labadia, N2VJ
Windham, NY

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).
630 Meter Antenna Full ViewOptional Accessories


(*) Specifications are subject to change without notice.

Contacts & Reception Reports from Testing 'The Lowdown' Antenna, February 2023
The Lowdown 630 Meter Antenna Testing Map
Click the map to enlarge it.
 Get "the lowdown" on 630 meter HAM products, from designer Paul Dobosz.
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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Email Us

TRADEMARKS:  2X Signal Booster, ALERT AM Emergency Advisory Radio System, AMReady Broadcast Components, ANXX AM Radio Antenna, AP.55 Digital Message Player, ENcast Emergency Notification Broadcast System, EventCAST Portable Information Radio Service, FAS.6000 Flashing Beacons & Controller, FASTrack Quick-Erect Sign, FlashCAST Internet Broadcast Service, Flashing ALERT Sign System, FlexPlane Preassembled Groundplane, Free-Radiate On-Premise Radio Broadcast System, HPR.0990 High Performance Antenna, i A.M. Radio Transmitter, Information Station Specialists, InfoRadio Format, Information Station Classic, Information Station IP, Information Station USB, InfOSpot AM Radio Transmitter Station, IP.8 Digital Message Player, IP.76 Digital Message Player, ITS.6000 Highway Advisory Radio Network, LIGHTNING LED Changeable Message Sign, Lowdown 630-Meter Band Amateur Radio Antenna, MGR.021 Digital Audio Management System, MXB.22 THEMATCHBOX Impedance Matching Transformer, NX8R Digital Message Player, PPFL PPFS PowerPlane Preassembled Groundplane, RadioSAFE Wide Area Emergency Broadcast System, RadioSTAT Portable Emergency Advisory Radio Station, RE 2.5 Range Extender Outdoor Antenna and Tuner, RESPONDER 1 Portable Highway Advisory Radio System, RoadRunnR Portable Highway Advisory Radio System, SMR Signal Measurement Radio Receiver, Stealth Sign, StreamCAST Internet Audio Delivery Service, SS.3000 Free-Standing AM Radio Antenna System with Tower, SX.200 Wattmeter, Talking House AM Radio Transmitter, TH.5 InfOspot Transmitter, TMS.020 Digital Audio Management System, TR.6000 Transmitter, TMS.020 Digital Audio Management System, TR.6000 Transmitter Model 15.73, VP.9000 Vertical Profile Antenna Support and Grounding System.

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.