ST 120 tube amp repair


Can anyone recommend a good VTA technician in the Southeastern states? My three year old ST 120 amplifier lit up an output tube so I bought a new matched set. After installation, bias adjustment and 100 hours playing time, I have distortion on some program material and a random "dud" sound without any program playing. Also, a "ping" when the amplifier is first turned on and warms up. I am willing to drive to a shop within 200 miles of Jackson, MS if anyone has a recommendation. Thanks  
4jimbob
I realize this amplifier is below the threshold of most readers but I really need to get it up and going again. I am willing to drive to Dallas, TX or Nashville, TN to accomplish this. As for New Orleans, I took my McIntosh C-30 to THEIR recommended repair center for noise in the balance and loudness controls. After repair I was minus the turntable ground screw and the noise came back. So....Please somebody tell me a shop or qualified individual to get me operational. Thanks
Is Hank Alterman still in N.O.?  If so, call him. He is likely to have the answers.