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[Amps] SB-220 troubleshooting

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Subject: [Amps] SB-220 troubleshooting
From: Pete Smith N4ZR <>
Date: Sat, 13 Dec 2014 06:54:54 -0500
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My venerable SB-220 is displaying some odd symptoms. On 10M, for example, the Tune setting for maximum output has changed substantially, and the output power is down about 150 watts. There are smaller changes, progressively less serious, as I step down through the bands. Is it likely that the current pair of 3-500s is failing, or should I be looking somewhere else in the amp?


73, Pete N4ZR
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