K6MF, K9EQ, K6DVD and WB6DAO operate UHF (440 - 450 Mhz) repeater nodes that are usually connected together 24/7 via the internet (some wired, some wireless), except for special operations. All activity on one repeater will be heard by the remaining ones and any other connected stations.
All All of the above except K9EQ which is IRLP, are EchoLink nodes. Most of the EchoLink nodes are running Raspberry PI ($35 new) computer boards and consume very low power (less than 6 watts), but are very versatile, thanks in part to the "TLB" (The Link Box by Skip, WB6YMH) software that K6MF custom configured for us. 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.