I think a cheaper and easier way to accomplish this is to use a remote coax cable switch...you can find examples of this in the ARRL handbook or buy commercial ones from various amateur radio suppliers.  To try to use some sort of duplexer, you will spend a whole bunch of money and probably not be satisfied with the results you get.  

Hope this helps

Paul

An interesting question that I thought I knew the answer to; however, I looked up part 97 on the internet and guess what?  97.119 station identification and 97.205 repeater operation say nothing about requiring /r after the call sign!

I will continue looking through the rest of the rules since I obviously need a refresher!

Paul

The easiest two meter and 6 meter for that matter, antenna I ever built was made simply from coax!  Take a standard piece of coax, and separate the shield from the center conductor for the appropriate antenna length for the frequency on which you choose to operate.  You can hang the center conductor using a suction cup on a window and simply let the shield hang down thus creating a "vertical dipole" type of antenna.  I got very respectable SWR and good talking distance with this simple antenna!

Give it a try.

Paul

Hey,

Try checking out www.tigertronics.com

They sell tncs for $49 for packet only and $89 for multimode.

Paul

I have the instruction manual for sdp-600, however, it uses an 8 pin DIN plug.  Here are the listed pinouts:

1 open collector controller
2 push to talk
3 carrier detect
4 ground
5 ground
6 speaker
7 low impedance microphone
8 high impedance microphone

I hope this helps!

Paul