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1. [AMPS] AL80 pfffffttttt!! (score: 1): Author: ns1z@arrl.net (John / NS1Z); Date: Tue, 28 Sep 1999 19:07:41 +0000; Was testing the output of my AL80 (not A or B, or even C!) when the classic phfZzt sound echoed from the cabinet. When keyed, the grid current shows negative and little or no RF output power. Plate v; /archives//html/Amps/1999-09/msg00306.html (7,105 bytes)
2. [AMPS] AL80 pfffffttttt!! (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 28 Sep 1999 15:47:38 -0700; ? Negative grid current indicates that the fil. is shorted to the grid. (photo on page 15 of 9-90 *QST*). During an intermittent parasitic osc., considerable lateral force is apparently placed on th; /archives//html/Amps/1999-09/msg00311.html (7,545 bytes)

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