BUSY GSP RADAR APCH CTLR BECAME DISTRACTED WITH 3 NON XPONDER GA ACFT AND LOST SEPARATION WITH 2 RADAR IDENTED ACFT AT 7000 FT ON CONVERGING COURSES.

Narrative

VERY HVY TFC WITH IFR WX AT ALL ARPTS IN APCH AIRSPACE. I WAS WORKING 10 ACTIVE ACFT. 3 OF THESE AIRPLANES WERE NON RADAR. ONE OF THE NON RADAR ACFT HAD A NON OPERATIVE XPONDER. THIS PLANE HAD A RTE OF FLT OF AND DIRECT CAE AT 5000 FT. CAE WAS IN A CENRAP OP. THEIR PRIMARY AND SECONDARY RADAR WAS OTS FOR DRIVE GEAR REPLACEMENT (ONE OF THE DRIVES STILL WORKED). CAE APCH DID NOT TELL GSP OF THEIR CENRAP OPS. I HAD APPROVED A NON RADAR 4000 FT FLT DIRECT GRD-CEU AT 4000 FT WITH CAE. THE NON XPONDER ACFT WAS ALSO AT 4000 FT BECAUSE OF XING 5000 FT TFC. I WAS TOO PREOCCUPIED WITH THESE ACFT AND OTHER ACFT BOTH ON OVERFLTS AND VECTOR FOR APCHS THAT I DID NOT SEE 2 ACFT AT 7000 FT. AFTER I CLBED NON XPONDER ACFT TO 5000 FT I WAS TOLD BY MY CIC THAT CAE COULD NOT ACCEPT THIS ACFT WITH NO EXPLANATION. I THEN TOLD ACFT TO JOIN AIRWAY; RPT ESTABLISHED AND 15 NM SE OF GRD. I HAD TO GO BACK ON LAND LINE TO COORDINATE ACFT MYSELF. RIGHT AFTER A POS RPT AND FREQ CHANGE OF THE 5000 FT NON XPONDER ACFT; THE CONFLICT ALERT WENT OFF. I TOOK ACTION TO TURN BOTH ACFT BUT SEPARATION WAS LOST WHEN ONE OF THE PLANES FAILED TO RESPOND TO 2 CALLS. PROBS CAE ON CENRAP AND GSP WAS NOT TOLD ABOUT THIS. I SPENT TOO MUCH TIME GETTING POS RPTS; ALT VERIFICATIONS AND COORDINATING THESE NON RADAR ACFT. RADAR COVERAGE IS VERY POOR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED HE HAD LOST SEPARATION BTWN THE 2 RADAR ACFT WHILE HE WAS ON THE LAND LINE COORD WITH CAE CENRAP. AT THAT TIME HE WAS ADVISED THE CENRAP HAD A RADAR OUTAGE. HIS RADAR POS WAS COMBINED AND HE WAS GETTING SOME HELP WITH COORD FROM THE CIC. AS A RESULT OF THE OPERROR; CHANGES HAVE BEEN MADE TO LOA'S WITH ADJACENT FACILITIES TO INSURE EQUIP PROBS ARE IMMEDIATELY RPTED.