1268 South Ogden Street Denver, Colorado 80210 USA
email     Phone: 303-722-2257     FAX: 303-744-8876    
9 a.m. - 5 p.m. MST Monday - Friday

SE Series No-Compromise HF-Mobile Antenna		Capacity Hat		SE-3 MK III
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SE Series No-Compromise HF-Mobile Antenna System The world of miniaturization has brought us compact HF rigs and tiny mobile antennas. Small rigs have resurrected the interest in mobile, but until now the antennas more resembled narrow-band dummy loads than high-efficiency radiators! One of the world-class mobile DXers, John Beale, KDOU, came to Sherwood with one request: Build a high efficiency 40-meter mobile antenna that would handle the full legal power limit. With 20 years of in-house mobile antenna experience to draw on, Sherwood developed the SE-40 antenna system.

• The System: One five-foot custom-made stainless whip, and a large ultra-high Q coil and insulator assembly. Optional extra-high-strength masts and capacity hat available, see below.
  
  
• Advantages: 5-dB signal increase. 50-ohm resistive match at resonance, a must for today's solid-state rigs. Can be tapped for 20 and 15 meters.
  
  
• Disadvantage: It's large!
  
  
• Matching: Requires a 470 pF capacitor be clipped across the feed point on 40 meters and 1200 pF on 75 meters. When used with 36-inch base section, 100 pF recommended on 20 meters for a perfect match.
  
  
• Dimensions:
  
  • SE-40 12 inches by 3 inches (40 - 10 M): $89.00 US
  • SE-75 18 inches by 3 inches (75 - 15 M): $99.00 US
  • SE-160 18 inches by 6 inches (160 - 15 M): $349.00 US
  
  
• Add Ons: One five-foot custom-made stainless whip, and a large ultra-high Q coil and insulator assembly. Optional extra-high-strength masts and capacity hat available, see below.
  
  • Two-piece dual-diameter 3/8- & 3/4-inch stainless steel 6-foot mast: $79.00 US
  • 3/8-inch diameter stainless steel masts:
    

    Three Feet: $39.00 US
    Four Feet: $49.00 US

  • Two-inch brass high-strength base mount: $69.00 US
    (Requires user-supplied bumper bracket. Call for details.)

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Capacity Hat Increases 40-meter bandwidth by 50% & 40-meter signal by an additional 1 dB: 2-foot capacity hat, required with SE-75: $49.00 US 3-foot capacity hat, required with SE-160: $75.00 US

Shipping & Handling Charges:

SE-40, SE-75, & SE-160: $15.00 US Mobile Mast: 20.00 US Capacity Hat: $10.00 US Overseas: Contact us for shipping quote

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Click Here For Additional Information on the SE-3 MK III

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1268 South Ogden Street Denver, Colorado 80210 USA
email     Phone: 303-722-2257     FAX: 303-744-8876  
9 a.m. - 5 p.m. MST Monday - Friday

Updated 6 March 2006