CE560 captain reported loud static after departing dal and the inability to hear ATC. Problem slowly...

Attributes
ACN	844353
Time
Date	200907
Local Time Of Day	1201-1800
Place
Locale Reference	DAL.Airport
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Citation V/Ultra/Encore (C560)
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	Vectors SID Tex9
Flight Plan	IFR
Component
Aircraft Component	VHF
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 6500 Flight Crew Type 700
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Departed from dallas love on runway 31R. Clearance was to fly runway heading and to climb to 5000 ft. During the climb after takeoff both comms started giving off a loud static noise in the headsets. With this noise we could not hear departure instructions but could communicate to departure. We told them of our situation; changed the transponder to 7600 and maintained the climb to 5000 ft. Static noise slowly started to decrease and we briefly could hear departure for a request to climb to 8000 ft. Once at 8000 ft the noise completely went away and communications was again established with fteparture. Told the controllers the issue was resolved for now and was told to continue with the departure with the correct squawk code. The loud static noise did not appear again during the trip. After landing at our destination contacted our avionics shop to investigate the problem. Moisture from an earlier downpour could possibly have caused the problem.

Original NASA ASRS Text

Title: CE560 Captain reported loud static after departing DAL and the inability to hear ATC. Problem slowly corrected itself and disappears entirely at 8000 FT. Moisture from an earlier down pour was suspected as the culprit.

Narrative: Departed from Dallas Love on Runway 31R. Clearance was to fly runway heading and to climb to 5000 FT. During the climb after takeoff both COMMs started giving off a loud static noise in the headsets. With this noise we could not hear departure instructions but could communicate to Departure. We told them of our situation; changed the transponder to 7600 and maintained the climb to 5000 FT. Static noise slowly started to decrease and we briefly could hear Departure for a request to climb to 8000 FT. Once at 8000 FT the noise completely went away and communications was again established with FTeparture. Told the Controllers the issue was resolved for now and was told to continue with the departure with the correct squawk code. The loud static noise did not appear again during the trip. After landing at our destination contacted our avionics shop to investigate the problem. Moisture from an earlier downpour could possibly have caused the problem.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

CE560 captain reported loud static after departing dal and the inability to hear ATC. Problem slowly corrected itself and disappears entirely at 8000 ft. Moisture from an earlier down pour was suspected as the culprit.