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1. [AMPS] AL-1500 oscillation? (score: 1): Author: w7xu@dtgnet.com (W7XU Arliss); Date: Sun, 21 Feb 1999 09:48:18 +0000; I noticed a problem with my Ameritron AL-1500 amp tonight. When the amp is keyed in the CW position with no drive (but with the exciter connected to the input of the amp), all seems fine, with no RF; /archives//html/Amps/1999-02/msg00560.html (7,591 bytes)
2. [AMPS] AL-1500 oscillation? (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 21 Feb 1999 03:35:40 -0800; ? Is your AL-1500 allegedly "neutralized"? ? yes. Some owners have also experienced tube-failure due to gold-sputtering from the grid during intermittent oscillations. ? 1. Remove any so-called "neu; /archives//html/Amps/1999-02/msg00562.html (8,494 bytes)
3. [AMPS] AL-1500 oscillation? (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Sun, 21 Feb 1999 16:16:37 -0500; Arliss, is it an Ohio built Ameritron or an MFJ version? I believe Sept 1989 was the transition date. Try that tube in your 6M amp. The steady power signifies a neutralization problem and can be due; /archives//html/Amps/1999-02/msg00584.html (9,289 bytes)

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