MEM TRACON controller expressed concern regarding the continued difficulties with frequency 126.7. Pilot's have reported frequency as scratchy and broken; the reporter suggested utilizing alternate 'spare' frequency until the issue can be resolved.

Narrative

I was working the west final position during the inbound; using 126.7 as my frequency. I experienced radio problems with several aircraft about 20 miles north of the airport extending to about 25-30 miles north. The majority of aircraft heard my transmissions loud and clear; but three that I recall had difficulty. The aircraft that had trouble reported my transmissions as scratchy and broken and unreadable. I switched headset jacks and changed back and forth from main to standby transmitters; but this did not seem to have any effect. I submitted a NASA ASRS form on frustrations created by this same problem the day before involving myself and another pilot. I intend to file an unsatisfactory condition report (UCR) at my facility; as I am not aware of anything being done to correct the problem. Our facility does have a 'spare' frequency that could be used until the problem is discovered and fixed. This 'spare' frequency is used for the Runway 9 final; but Runway 9/27 is closed due to reconstruction for 6 more months.