Wireless N router that will work with a 14dBi antenna with a TNC connector

When I need antenna or have questions about cables/adapters I call these guys:
http://www.l-com.com/

Very helpful and have always been able to tell me what cOnnecters things have. Give them a call.

I'm not aware of any 11n wireless routers that use TNC connectors...  Linksys used to use Reverse Polarity TNC (RP-TNC), but about the only 11n router they make with removable antennae anymore (the WRT160NL) uses RP-SMA connectors.

L-Com's Radio to Connector cross reference is at http://www.l-com.com/content/RadioConnectorCrossReference.html
(it takes a while to load).
I only see 4 units that use TNC connectors

Microwave Data Systems iNET 900
Nurit - 3010 Wireless Credit Card Terminal
Senao - NL-2511AP Pro Plus
Wi-LAN - AWE120-24

The only type they make short adapters to from TNC is the standard N type. (see http://www.l-com.com/content/AdapterLocatorChart.html )

If it's actually an RP-TNC plug, there are a lot more choices. e.g. Cisco Aironet 1300 series.

Many manufacturers do not put removable antennae on their 11n offerings, then they don't have to worry about end users putting high gain omnis on them and stepping all over other customers' signal by using 2/3rds of the 2.4GHz band with a single wide channel (it would be, essentially, peeing in their own pool)... that's the reason Apple, Cisco and Intel don't support wide channels in the 2.4GHz band, at all (even though Linksys, a subsidiary of Cisco, does allow wide channels in the 2.4GHz band).

Anyway, it might actually turn out cheaper to get one of the previously mentioned WRT160NL routers and connect a MIMO antenna like
http://www.l-com.com/item.aspx?id=20304
to it. That should be under $100 for the whole kit, shipped.  Then sell or give the antenna you have to someone else.

Thanks for the great information.  If i purchased a Linksys WRT54G (it has two antennas with RP-TNC connectors), would I have to add an additional antenna?

I'm trying to create an access point at a race track and need up to 1/2 mile of coverage in all directions.

For a 1mile diameter network coverage you may need something more complicated and expensive than an external antenna.

Maybe get a few meraki, let them mesh, spread them out. They integrate PayPal for access so you can charge a buck for access.