Good Sam Club Open Roads Forum: 2 meter / 440 (70cm) Ground independent Antenna
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 > 2 meter / 440 (70cm) Ground independent Antenna

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ab7oh

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Posted: 06/17/13 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

The Comet SBB-5NMO dual band is a 2 meter and 440 MHz mobile antenna. It is a 1/2 wave on 2 meters providing 3 dB gain and a 2 5/8 wave on 440 MHz providing 5.5 dB gain. VSWR 1.5 : 1 or less. This antenna can handle up to 120 watts. I installed this antenna on my Motor Home because it is ground independent. It had 1.3 : 1 or less on both bands.


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Bill.Satellite

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Posted: 06/17/13 05:36pm Link  |  Quote  |  Print  |  Notify Moderator

Ham radio something I am guessing?

Gdetrailer

PA

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Posted: 06/17/13 06:15pm Link  |  Quote  |  Print  |  Notify Moderator

ab7oh wrote:

The Comet SBB-5NMO dual band is a 2 meter and 440 MHz mobile antenna. It is a 1/2 wave on 2 meters providing 3 dB gain and a 2 5/8 wave on 440 MHz providing 5.5 dB gain. VSWR 1.5 : 1 or less. This antenna can handle up to 120 watts. I installed this antenna on my Motor Home because it is ground independent. It had 1.3 : 1 or less on both bands.


That is the equivalent to a Diamond NR-770RA (NMO mount) and NR-770HA (UHF mount) antenna which is also radialess (doesn't require a ground plane).

While they will work as radialess, I have found that they tend to work much better for distance if you DO provide radials. Doesn't take much a couple feet of wire or even a piece of sheet metal.

wa8yxm

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Posted: 06/18/13 10:05am Link  |  Quote  |  Print  |  Notify Moderator

Bill.Winegard wrote:

Ham radio something I am guessing?


Good Guess...Mine is a Diamond. Same basic specs.


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w4phj

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Posted: 06/18/13 11:53am Link  |  Quote  |  Print  |  Notify Moderator

Bill.Winegard wrote:

Ham radio something I am guessing?


You guessed correctly !!


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