I run my C= card in the 10base2 coax cable. I had a hub with that as the uplink, and simply wired it to the hub, rather than using a 10baseT transciever.
If you have a hub with a 10base2 uplink and a network adaptor (card) that is 10base2 (like the original C= Amiga network card) all you need is a length of 50ohm coax, 2 T connectors, and 2 50ohm terminators.
Screw one terminator on each T connector
Screw the coax between the two T's
Screw one T to your hub, and one T to your network card. (remembering to set any necessary jumpers on the network card to tell it you're using coax!)
Test network -- you're done.
I found this configuration ran quite a bit faster on my Amiga than my former X-Surf...
