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  1. QHL214

    upd858 Ferris 5500 (Robyn 520d) SSB distortion on RX and TX

    Hi everyone. I have an Australian version of the Robyn 520D (a Ferris 5500) which has distorted RX and TX audio on SSB only. AM is fine. I have completely recapped the radio and aligned it using the TRC-449 service manual. I guess it might be a problem in the IF stages or BM but all IC and...