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Thread: AL-811 Low Power out 10 Meter band

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  1. #1
    Join Date
    Jan 2008
    Location
    Central Florida
    Posts
    235

    Default AL-811 Low Power out 10 Meter band

    Tuner on tuner off only about 300 watts. Any suggestions?

  2. #2

    Default

    Quote Originally Posted by KJ4AQU View Post
    Tuner on tuner off only about 300 watts. Any suggestions?
     Increase the diameter of the Cu tubing used for the 10m L. A good example of an amplifier design that did it right to compensate for RF skin effect is the Kenwood TL-922. . . . Are all of the filaments lit?
    Rich, AG6K, [url]www.somis.org[/url] 805-386-3734

  3. #3

    Default

    I also had the same problem and was not even able to hold 300 watts on 10 and 17 meters. I purchased an adjustment tool from MFJ to adjust the slugs in the rear of the amp. I found instructions on how to make these adjustments using search on the internet. I now get 400 plus watts on both bands...

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