OPERATOR ERROR BTWN MIL X AND MIL Y.

Narrative

THE WX WAS MARGINAL VFR WITH REDUCED VISIBILITY DUE TO GND FOG. PAR APCHS WERE BEING CONDUCTED SEVERAL FREQS WERE RELEASED TO MAINT DUE TO EARLIER TROUBLE. I WAS INFORMED A PARTICULAR FREQ WAS RETURNED FOR USE. I ATTEMPTED TO USE IT AND IT APPEARED NORMAL INITIAL CONTACT WAS NORMAL. LATER WHEN VITAL CTL INSTRUCTIONS WERE ISSUED; THE ACFT DIDN'T RESPOND. AFTER SEVERAL ATTEMPTS TO CONTACT THE ACFT; ALTERNATE INSTRUCTIONS WERE GIVEN TO AN ACFT NEAR VIOLATION TO ACFT #1. ACFT #2 TOOK INSTRUCTIONS AND AVOIDED COLLISION; BUT VIOLATED FAA MINIMUMS. I MUST INCLUDE THE FACT THAT NUMEROUS (12-13) ACFT WERE BEING WORKED AT THE GIVEN TIME. THIS IS NOT A PROB AS LONG AS WE USE RELIABLE EQUIP. THE 2 ACFT WERE BOTH WITHIN 15 MI OF THE ARPT; SO NEAR ALTS IS EXPECTED. OUR FACILITY HAS HAD NUMEROUS PROBS WITH OUR FREQS. REQUEST AND LETTERS FOR NEW EQUIP HAS GOTTEN NOWHERE. FREQS ARE RELEASED ON A DAILY BASIS FOR REPAIRS. OUR EQUIP IS ANTIQUATED AND UNRELIABLE. THE SAFETY OF OUR FLYING PUBLIC CANNOT BE SACRIFICED BECAUSE OF UNPREDICTABLE EQUIP. ATTACHED IS A COPY OF THE LETTER I SENT TO WASHINGTON WITH A UCR.