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...for a networked media box which requires an adapter with a realtek RTL8188SU chipset:

the best options (imo) come down to a few omni directionals ranging from 6dbi to 2dbi and a 10dbi panel antenna.

i have a single story house and the signal needs to reach about 50-70 feet away, so the higher dbi omnis ought to be more optimal (right?).

LEGUANG LG-19 6dBi omni directional , Transmit Power: 20dBm , 200mW
[spoilers]*Follow standard: IEEE 802.11 G; IEEE 802.11 B use IEEE 802.11 N (draft2.0) technology
*Transfer rate: 11 B: 1/2/5. 5/11 Mbps
11 G: 6/9/12/18/24/36/48/54 Mbps
11 N: up to 150 Mbps
*Frequency range: 2.4-2.4835 GHz
*Working channel: 1-13
*The transmit power: 20 dBm (maximum)
64/128/152-bit Wep encryption
*Other features: PSP Xlink game support
*Interface: USB 2.0
Wireless Transmit Power: 20dBm (Max.)
- Transmitted power: 200mW
- Transmission standard: IEEE 802.11n
- Transmission rate: 150Mbps
- Safety control: WPA2
- Interface: USB
- Antenna: 6dBi
- Supports operating system Windows 7 / XP / 2000 / Vista
- Packing List:
- 1 x Network card
- 1 x Antenna
- 1 x Software CD
CD Content:
Dimensions: 1.77 in x 0.98 in x 0.43 in (4.5 cm x 2.5 cm x 1.1 cm)
Weight: 1.23 oz (35 g)
*Antenna: external antenna
*Use environment: work environment: 0 degrees Celsius-40 degrees Celsius
*Storage temperature: -20 degrees Celsius-70 degrees Celsius
*Humidity: 10% -95% RH without setting[/spoilers]

Airlink101 AWLL5166HP 5dBi omni Sensitivity: -93dBm Warning: Spoiler! (Click to show)
High power 500mW with detachable 5dBi high gain antenna strongly boosts the signal strength and coverage
Data rate of up to 150Mbps with Wireless N technology, 3 times faster than 802.11g
Great for environment needs extra long range extender
WPA2/WPA-PSK enhanced wireless security provide full protection for your network
Built-in Easy Setup Button for easy connection to existing wireless network
Compact size and low profile design
Compatible with both Windows and MAC operating system
RoHS compliant
Standards: IEEE 802.11 b/ g/ n; IEEE802.11 d, e, h, i, j
Frequency Band: 2.4 GHz
Antenna Connector: Reverse SMA Male Plug
Access Method: Infrastructure Mode, Ad-Hoc Mode (802.11b Ad-Hoc), Roaming
Interface: USB 2.0/ USB 1.1
Data Rate: 11b- 1/ 2/ 5.5/ 11Mbps (auto sensing); 11g- 6/ 9/ 12/ 18/ 24/ 36/ 48/ 54Mbps (auto sensing); 11n- up to 150Mbps
Receiver Sensitivity: -93dBm
LED: Power/ Link
Security: WPA2/WPA-PSK; WEP64/128-bit
Quality of Service: WMM, 802.11e
Antenna Type: Deatachable 5dBi Indoor Omni Antenna
VSWR: <1.5 max (0~6 GHz)
Beam Width-H Plane: 360° (Vertical)
Beam Width-E Plane: 60°
Polarization: Vertical (Linear)
Impendence: 50ohm
Certification: FCC, CE, IC
Dimensions(W x L x H): Adapter- 0.63 x 2.4 x 0.35 inch/ 16.0 x 60.0 x 9.0 mm; Antenna- 7.8 inch/ 198.0 mm
Support OS: Windows 7/ Vista/ XP/ 2000, MAC OS 10.4/ 10.5/ 10.6, Available USB port
Package Contents: Wireless N 150 High Power USB Adapter; Quick Installation Guide; Utility CD

Netis WF-2106 2dBi omni Warning: Spoiler! (Click to show)
IEEE 802.11b/g/n
Wireless Data Rates
Up to 150Mbps
64/128-bit WEP, WPA and WPA2, WPS
USB 2.0
Frequency Band
2dBi Detachable External Antenna
System Requirements
Available USB 1.1 or USB 2.0 slot
300 MHz processor and 32 MB of memory
CD-ROM drive
An 802.11b/g/n access point (for Infrastructure Mode) or another 802.11b/g/n wireless adapter (for Ad Hoc; Peer-to-Peer networking mode.)
Microsoft Windows 7, Vista, XP, 2000 SP4
Temperature 0°C - 40°C (32°F - 104°F)
10% - 85%, Non-Condensing
Comply with IEEE 802.11b, 802.11g and 802.11n standard for 2.4GHz Wireless LAN

EnGenius EUB9603 EXT 2dBi omni Warning: Spoiler! (Click to show)
IEEE 802.11b/g/n
Wireless Data Rates
Up to 150Mbps
64/128-Bit WEP, WPA, WPA2
USB 2.0
Frequency Band
2.4GHz - 2.484GHz
11 Channels (US, Canada) 13 Channels (Europe)
2dBi Detachable Omni Antenna
3.27" x 1.18" x 0.43"
0.3 lbs.
0°C - 40°C (32°F - 104°F)
0% - 95%, Non-Condensing

Airlink101 AWLL5055 10dBi High Gain panel Warning: Spoiler! (Click to show)
10dBi High gain for wireless range extender strongly boosts the wireless signal
WPA2, WPA, and WEP enhanced wireless security provide fully protection for your network
Antenna to Vertical: 110� and Horizontal: 60� emission of your highly amplified wireless signal. 270� Tilt-and-swivel design for best reception
Standards: IEEE 802.11b/g/n
Interface: USB 2.0/ USB 1.1
Data Rate: Up to 150Mbps
Frequency Band: 2.4 ~ 2.4835 GHz
Access Method: Infrastructure Mode, Ad-Hoc Mode (802.11b Ad-Hoc), Roaming
Antenna: 2.4GHz 10dBi Indoor Patch Directional Antenna
Transmit Power Settings: 16dBm(OFDM)/ 18dBm(CCK)
Security: WPA2/WPA-PSK (AES, TKIP); WEP 64/128-bit
Gain: 10dBi
VSWR: <1.5 max (0-6 GHz)
Beam Width-H Plane: 110� (Vertical)
Beam Width-E Plane: 60�
Polarization: Vertical (Linear)
mpendence: 50ohm
LEDs: Link, Power
Certification: FCC, CE, IC
System Requirements: Windows 7/ Vista/ XP/ 2000; MAC OS 10.4/ 10.5/ 10.6 (Intel-based Only); Available USB slot
Package Contents: Wireless N 150 USB Adapter with 10dBi High Gain Antenna; Quick Installation Guide; Utility CD
Dimensions(WxLxH): 14.0 x 34.0 x 6.0 mm

i was all set to purchase the 6dbi omni leguang but then it occured to me that perhaps software and driver support might become an issue as i've never heard of the brand ... the next best option is a 5dbi omni airlink, which has more detailed specs (i think) and is more common but has 1 less dbi.

i defer to the experts. what do y'all think?

on the by and by, i'm also shopping for a new dual channel adapter for a pc with the same distance requirements. how do these look?

D-Link DWA-160

trendnet tew684ub

linksys ae3000

asus USB-N53