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post #11 of 43 Old 03-07-2009
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A beautiful ripoff of a stuffer slappy!!!
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post #12 of 43 Old 03-07-2009
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I don't know how technically minded you are, but building a "cantenna" is both inexpensive and very effective. Some of my friends have played around with these and got excellent results. Just google them, there are a dozen recommendations on the net for how to build them. The key is the USB WIFI transceiver w/cable connection. $10.00 last time I looked. I don't really know how a rocking deck may effect the reception, but it should be fine under most circumstances.
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post #13 of 43 Old 03-08-2009
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JRD—

If you don't want to build your own, try the Ubiquiti NanoStation 2

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post #14 of 43 Old 03-08-2009 Thread Starter
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SD- I took a look at the link and, excuse my technologically challenged ignorance, but is that a WiFi antenna system? I read the product description and I still don't know what the heck it does? Price looks attractive though.
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post #15 of 43 Old 03-08-2009
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JRD—

That's basically an amplified high-gain directional antenna with an integrated ethernet bridge. It basically converts a wifi signal into a Cat5 ethernet connection. It provides about a 10 dB gain in signal strength and gives about 60˚ of horizontal coverage, which is usually good enough for most boats at anchor to use—and easily well within the capabilities of covering a boat in a slip.

The advantage of doing this is that there is no signal strength lost due to having a long antenna cable. It is pretty simple to power it off the boat's DC system, since it operates on 12 VDC. Also, you only need to run a single cable, since the unit uses Power Over Ethernet to power itself.

Available here for $80 or so.

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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
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—Cpt. Mal Reynolds, Serenity (edited)

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Last edited by sailingdog; 03-08-2009 at 01:31 PM.
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post #16 of 43 Old 03-08-2009
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Quote:
Originally Posted by jrd22 View Post
Norm- I'm still trying to decide which way to go on this, what you did sounds interesting. I don't understand how just the router gained the extra range you needed. I'll google the software, but do you know what range people have been able to pull in signals from? Thanks very much for the info.
I think I gained about 200 meters of range over just using the laptop alone. This is based on an experiment I did by using the laptop in the parking lot. I had to be about half the distance to the hotspot before I could make it work reliably.

I'm sure that the increased range was due to the better external antennas on the router. It has two adjustable antennas about 6" long.

I like the looks of the Ubiquiti Networks products. I'd love to hear about anyone's experience using them. The "Bullet" with an omni-directional antenna might be a great solution for a sailboat.
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post #17 of 43 Old 03-09-2009
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The extention cable used on this homemade job is an "active" cable. No losses with this. If you build one, be sure to get the "active" and not a "passive", or you will experience some loss. I went with this system because it uses an omni-directional antenna. I was thinking this should work well swinging on the anchor or mooring ball. I wouldn't think a directional antenna would work too well out there.
By the way, XORT, excuse my ignorance, but what the hell is a "stuffer slappy"?

The new ship here is fitted according to the reported increase of knowledge among mankind. Namely, she is cumbered end to end with bells & trumpets & clock & wires, it has been told me, can call voices out of the air of the waters to con the ship while the crew sleeps. But sleep thou lightly, it has not yet been told me that the Sea has ceased to be the Sea. Rudyard Kipling
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post #18 of 43 Old 03-09-2009
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Here is some more info on antennas and such..

WIFI WIRELESS INTERNET:
-http://www.mfjenterprises.com/
MFJ-1800 $25 Yagi type? MFJ-1802 $50 Flat panel type?
-NGC natcommgroup.com SF-245W-R omni directional type.
-http://www.pacwireless.net/antennas/2400Mhz-antennas.shtml
-http://www.air802.com/wireless-usb-wifi-adapter-802.11b-g-with-external-removeable-antenna-formerly-usb-adg-1.html?&cat=411
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post #19 of 43 Old 03-09-2009
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Why do all this and go through all the hassle, when NanoStation2 is only $80 bucks, all assembled..
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And now for our total expenditures:

Engenius EUB-362-EXT $45.50
Engenius EAG-2408 Outdoor antenna $24.99
CA100 –NM-RSMAM-12 RPSMA Male to N Male 12” cable $9.00
RJ45-FT Feed-thru adapter $1.10
104 Coax seal $2.29
Plastic Junction box with lid $12.16
20’ Male to Female USB active extension cable $12.99
Silicone caulk $5.95

Total cost: $113.98

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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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post #20 of 43 Old 03-09-2009
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Dock
Drakus' WiFi

WISP Router (wisp-router.com) sold me a RooTenna and an Engenius C3B for about $200. The antenna has about 19dB of gain and space for the C3B radio to fit inside. There is very little signal loss when the C3B (the radio portion) is at (inside) the antenna. The antenna is described as directional but it does have a fairly wide sweet spot. It takes 12vdc power and outputs ethernet connectivity. Ethernet hookup means easy connection to your machine.


Specifications:
Parameter
Min
Typ
Max
Units
Frequency Range
2400
2485
MHz
Input Return Loss (S11)
-14
dB
VSWR
1.5:1
Impedance
50
OHM
Input Power
20
W
Operating Temperature
-45
+70
Deg C
Gain
19
dBi
3db Beam Angle (E-Plane)
15
Deg
3dB Beam Angle (H-Plane)
20
Deg
Front to Back
30
dB
Weight
9 (4.1)
Lb (kg)
Compartment Dim (L x W x H)
16.25” x 14.75” x 2”
(413 x 375 x 50)
Inches (mm)
Outside Dim (L x W x H)
18.5” x 16.8” x 4”
(470 x 427 x 102)
Inches (mm)
Wind Loading
100MPH
125MPH
100MPH with ˝” Radial Ice
Force (Lbs)
77.8
121
83


ECB-3220 below. This is the higher power, 400mW, new improved version. This is what goes inside the RooTenna, sans rubber ducky.


Darn, I've got this stuff below and don't know how to delete it. Suggestions welcome. Doug
































































































Last edited by dsiddens; 03-01-2011 at 11:37 PM. Reason: clarity
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