K6MF, K9EQ, K6DVD and WA6IBE operate UHF (440 - 450 Mhz) repeater nodes that are usually connected together 24/7 via the internet (some wired, some wireless), except during special operations. All activity on one repeater will be heard by the remaining ones and any other connected stations.
AK6DDll K6DVD, WA6IBE and WB6DAO now run the AllStar linking software running off of several Raspberry Pi computer boards. Besides being very inexpensive ($35) and available off the shelf at Fry's they consume less than 6 watts. See a couple of hardware pictures here.
NOTE on "Private Conference" status:
Please understand that we are not trying to eliminate any licensed hams BUT because of abuse by a few stations including:, bad language, conversations in foreign languages, unwanted cross links, random unidentified connects/disconnects, and other problems, the access to these nodes has been restricted to: "Private Conference" If you wish to be added to the conference list, let us know in an email.