LOSS OF ALL COM RADIOS.

Narrative

WE LEFT KFFO FOR EGUN WITH A FUEL STOP AT KPBG. WE WERE A CHARTER FLT FOR THE DOD FLYING FOR THE UNITED NATIONS. OUR COMPANY DEPARTED US WITH THE #1 COM RADIO ON OUR MEL/CDL LIST FROM THE USA FOR THE UNITED KINGDOM. WHEN THE ACFT WAS HANDED OFF FROM DUBLIN CTL TO LONDON RADAR; WE COULD SEND AND RECEIVE OK. AS WE PAST WAL VOR; THE #2 COM RADIO BECAME INTERMITTENT. WE COULD HEAR OTHER ACFT OK BUT LONDON RADAR CTL BECAME BROKEN. WE WERE GIVEN A TURN TO 360 DEGS BY A RELAY FROM ACR Y FLT. BTWN OTHER ACFT RELAYING FOR ATC AND BROKEN CONTACT WITH ATC. WE FOUND OUT THAT OUR ACFT WAS IN CONFLICT WITH ANOTHER ACFT AND LONDON RADAR WAS CALLING IT A NEAR MISS. WE ENDED UP ON 121.5 GUARD FREQ FOR THE REMAINDER OF THIS FLT UNTIL WE COULD TALK WITH MILDENHALL AFB; UNITED KINGDOM. WE HAD NO PROB ON 123.2 OR 122.55 VHF FREQ. WE ENTERED THE PROB INTO OUR MAINT LOG. MAINT WAS PERFORMED ON THE RADIOS BEFORE THE ACFT DEPARTED FOR AFRICA. I FEEL THAT THE MEL/CDL SHOULD NOT ALLOW THIS TYPE OF OP. FOR INTL FLT OP; BOTH VHF COMS SHOULD BE IN WORKING ORDER. THE PROB HERE IS TOO LIBERAL OF A MEL.