RADIO

Two Plymouths--not the automobiles, but the towns--got together over the Atlantic Ocean for a little chat via a satellite radio hookup Tuesday. WPLM Radio of Plymouth, Mass., and Plymouth Radio Sound (which initiated the project last year) of Plymouth, England, kicked off their week-long simulcast with a listener call-in program that discussed barbershop-quartet singing in England and the alleged romantic liaisons of former presidential candidate Gary Hart. Sen. Edward M. Kennedy (D-Mass.) and former British Foreign Secretary David Owen were scheduled to participate during the week, and several British broadcasters planned to broadcast a Boston Red Sox baseball game live from Fenway Park to England.