A captain reported having trouble hearing the controller on a frequency he was assigned. This freque...

Narrative:

We were handed off from la center to albuquerque center sector 45 frequency 124.500. After switching on to 124.500 it was nearly impossible to hear ZAB controller instructions because 124.500 is also a frequency used by socal approach control for lax arrivals. Repeatedly; aircraft checking in to socal approach on 124.500 blocked out the ZAB controller. It was to the point that I was seriously concerned we could not hear what the ZAB controller wanted us to do. ZAB sector 45's location is at the western boundary of ZAB airspace. Aircraft climbing out of las have line of sight with aircraft descending into lax thus it is very easy for the two to generate radio transmission conflict on the same frequency of 124.500.

Original NASA ASRS Text

Title: A Captain reported having trouble hearing the Controller on a frequency he was assigned. This frequency is also an arrival frequency for LAX arrivals. The Captain reported of bleed over the frequency and wasn't sure if he was receiving all the transmissions from ZAB Center.

Narrative: We were handed off from LA Center to Albuquerque Center Sector 45 frequency 124.500. After switching on to 124.500 it was nearly impossible to hear ZAB Controller instructions because 124.500 is also a frequency used by SoCal Approach Control for LAX Arrivals. Repeatedly; aircraft checking in to SoCal Approach on 124.500 blocked out the ZAB Controller. It was to the point that I was seriously concerned we could not hear what the ZAB Controller wanted us to do. ZAB Sector 45's location is at the western boundary of ZAB airspace. Aircraft climbing out of LAS have line of sight with aircraft descending into LAX thus it is very easy for the two to generate radio transmission conflict on the same frequency of 124.500.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1280827
Time
Date	201507
Local Time Of Day	1801-2400
Place
Locale Reference	ZAB.ARTCC
State Reference	CA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 241
Events
Anomaly	ATC Issue All Types Inflight Event / Encounter Other / Unknown

A captain reported having trouble hearing the controller on a frequency he was assigned. This frequency is also an arrival frequency for lax arrivals. The captain reported of bleed over the frequency and wasn't sure if he was receiving all the transmissions from ZAB center.