C208 PLT CONTACTED DEP CTL ON THE WRONG FREQ AND FLEW TOWARD TALL TV TWRS BEFORE CORRECT FREQ WAS ESTABLISHED.

Narrative

WE WERE INITIALLY GIVEN 010 DEGS AS HDG AFTER TKOF; CLB TO 3000 FT; EFC 7000 FT 10 MINS AFTER TKOF FREQ 124.2. THE TWR THEN CAME BACK JUST PRIOR TO TKOF AND AMENDED THE HDG TO 070 DEGS. (I LATER FOUND OUT THIS WAS TO ACCOMMODATE OPPOSITE DIRECTION TFC ON A PRACTICE APCH.) WE TOOK OFF; CLBED AND STAYED OUT OF THE CLOUDS UNTIL I WAS SURE RADIO CONTACT HAD BEEN ESTABLISHED WITH DEP CTL. I TALKED TO DEP CTL ON WHAT I THOUGHT WAS THE ASSIGNED FREQ OF 124.2. (I WAS LATER TOLD BY PHONE THAT I WAS ACTUALLY ON 124.6; THE APCH CTL FREQ) AND WAS TOLD TO STAND BY. (I WAS LATER TOLD THAT THIS WAS BECAUSE THE CTLR ON 124.6 DID NOT KNOW WHO WE WERE; AND WAS TRYING TO DETERMINE THAT.) TO MY KNOWLEDGE; AND THAT OF THE PLT WITH ME; WE NEVER INTERCEPTED THE 355 DEG RADIAL OR CROSSED IT. AT LEAST NEITHER OF US SAW THAT RADIAL COME ACROSS. GPWS WAS ON AND I COULD SEE OUR COURSE WAS GOING TO TAKE US TOWARD A GROUP OF TALL ANTENNA TWRS. THE GPWS SHOWED THE HIGHEST OBSTRUCTION WAS 2800 FT MSL. AS WE APCHED THE OBSTRUCTION AND I WAS ABOUT TO TAKE EVASIVE ACTION; THE CTLR ASKED ME IF I SAW THE TWRS. I SAID I COULD NOT; SINCE I WAS IN IMC. THE GPWS DID NOT 'ALERT.' HE THEN SAID TO MAKE AN IMMEDIATE L TURN TO 340 DEGS AND CLB RAPIDLY TO 4000 FT. HE THEN SAID TO TURN FURTHER L TO HDG 290 DEGS. AFTER BREAKING OUT ABOVE THE CLOUDS AT 3500 FT; THE CTLR THEN GAVE ME CLRNC TO FLY THE FLT PLAN FILED. BOTH PLTS WERE WEARING FUNCTIONING HEADSETS.