[Amps] Alpha 76CA

[dwright at copper.net]

The input to this amp drives the tuner on my 775 crazy locks and un locks will not hold tune after about 500 watt out put from amp, antenna is resonant no rf coming back, if I put my manual tuner between radio and amp it tunes 1to1 and holds, so do I have tuner problems in the 775 or is something changing value in the alpha, by the way the 775 tunes the input on my L4B perfect, suggestions?
Don Wright WV4X