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  The Lowdown
Amateur Radio Antenna for 630 Meters
Model 630.PD
Related Link 
Printable Spec Sheet 
The Lowdown Amateur Radio Antenna offers amateur radio enthusiasts a convenient way to communicate on 630 meters in a confined area. Designed to be centered above a horizontal groundplane, this 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.
Specifications *
  • Type: LF base, vertical, whip, omnidirectional.
  • Impedance: 20-33 ohms with 25’-10' radius groundplanes, respectively.
  • 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).
Future Options
  • Block mounts.
  • Mast/stands.
  • Matching transformers.
  • Groundplanes.
The above support stand and groundplane shown with the antenna are future options.

 * These specifications are subject to change without notice.pan>

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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, Free-Radiate On-Premise Radio Broadcast System, HearMoreInfo Internet Broadcasts, 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, InfOspot Drive-Thru AM Radio Station, IP.8 Digital Message Player, IP.76 Digital Message Player, ITS.6000 Highway Advisory Radio Network, Lowdown 630-Meter Band Amateur Radio Antenna, MGR.021 Digital Audio Management System, LIGHTNING LED Changeable Message Sign, NX8R Digital Message Player, 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, SSD.20 Severe Storm Detector, Signal Measurement Radio Receiver, Stealth Sign, StreamCAST Internet Broadcast Service, SS.3000 Free-Standing AM Radio Antenna System with Tower, SX.200 Wattmeter, Talking House AM Radio Transmitter, TH.5 InfOspot Transmitter, TR.6000 Transmitter Model HQ 5.0, TMS.020 Digital Audio Management System, TR.6000 Transmitter Model 15.73, VoiceStar Portable Highway Advisory Radio Station (with or without Changeable Message Sign), VP.9000 Vertical Profile Antenna Support and Grounding System.

Information Radio Stations is a generic term synonymous with Travelers Information Stations (TIS), Highway Advisory Radio Stations (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, wateter, 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