Eimacs removed from medical service after hour-limit reached. Tested on standard medical electronics test fixture and found INDISTINGUISHABLE FROM NEW electronically and in output. Will sell with test data, 275ドル for one, 495ドル for two, shipped anywhere in lower 48. Have dozens in amateur use without a failure. By far the "Best Buy" for your 8877 amp (I use them myself). Tks es 73 to all! Jan N0JR