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1. [AMPS] screen emission, primary (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 9 Mar 1998 10:15:56 -0700; AG6K spoke of the primary emission from screen grid of 3CX800A7 due to overheated cathode, with subsequent barium deposition on the gold wire. This certainly is a concern if, as he said, the filament; /archives//html/Amps/1998-03/msg00079.html (8,594 bytes)
2. [AMPS] screen emission, primary (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 9 Mar 98 16:47:40 -0800; agreed not the same thing. Running the heater above the rating in a 3cx800a7 causes the problem. One can not burn it off of the grid by overheating the cathode because doing so evaporates more bariu; /archives//html/Amps/1998-03/msg00124.html (8,029 bytes)

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