The antenna connector used on the Saber is the MX type - a 1/4-32 x 7/32 stud. It is also used on the MT1000, HT750/125/1550, GP300, etc. It is also worth noting that the Astro Saber uses a type SF, and not a type MX, connector. They type SF is used on the Jedis, GTX, STX, etc.
I have a handy chart with pictures on my website that lists the connector types for most radios. Go to
http://shop.waltel.com/cgi-bin/store/co ... nnas_-_VHF and click on the Handheld Antenna Reference Guide link at the top of the page.
Hope that clears it up a little. Let me know if you have any questions.
Thanks,
Jeff