A FALCON 50 DISPATCHED OVERWATER RPTED BOTH HIGH FREQ RADIOS INOP CAUSED BY #1 SYS FAILURE AND #2 SYS TUNED INCORRECTLY.

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WHILE ENRTE FROM BDL TO TXKF (BERMUDA) WE EXPERIENCED POOR HF RECEPTION ON BOTH HIGH FREQ RADIOS. WHEN WE ARRIVED AT TXKF I DIALED UP 10000 FT TO SEE IF WE COULD RECEIVE A TIME CHK. IT WORKED SO I ASSUMED IT WAS JUST ATMOSPHERIC CONDITION AND VERY OLD TECHNOLOGY. WE DEPARTED TXKF FOR BDL AND I LET THE ZNY CTLR KNOW THAT WE HAD HAD HF PROBS ON THE WAY DOWN. HE ASKED ME TO DO ANOTHER CHK AND CALL HIM BACK WITH THE RESULTS. WE WERE UNABLE TO REACH COMMERCIAL RADIO ON HF (EITHER ONE) SO I ADVISED HIM. I PASSED ALONG A POS RPT AND WE CONTINUED ON. ABOUT 15 MINS LATER; I DISCOVERED MY XMITTER ON THE #1 HF HAD MALFUNCTIONED AND THAT THE FO HAD BEEN INPUTTING THE ASSIGNED FREQ WITH A DECIMAL POINT ON THE #2 SIDE. WE ESTABLISHED CONTACT WITH NEW YORK COMMERCIAL RADIO AND MADE A SATISFACTORY CHK. THE FLT WAS UNEVENTFUL THEREAFTER. SINCE I DID NOT CHANGE SEATS; I ASSUME THAT THE #1 HF XMITTER COULD HAVE FAILED ON THE WAY DOWN TO TXKF AND THAT THE FO HAD MADE THE SAME ERRORS INPUTTING THE FREQ ON THE WAY DOWN. I PROBABLY AND WRONGLY ASSUMED IT WAS JUST BAD ATMOSPHERIC CONDITIONS.