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563upgrade [2015/11/24 12:53]
n1eu
563upgrade [2015/11/24 12:54]
n1eu
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   *The later 564's have certain changes to top and bottom foil grounding on certain boards to improve 10M birdies which are a major problem with this rig.   *The later 564's have certain changes to top and bottom foil grounding on certain boards to improve 10M birdies which are a major problem with this rig.
   *The BPF filter on later 564's has a broadcast band mod to improve intermod in the presence of strong local AM BCB or SW signals. Night and Day difference on my rig.   *The BPF filter on later 564's has a broadcast band mod to improve intermod in the presence of strong local AM BCB or SW signals. Night and Day difference on my rig.
-  *An aftermarket mod from INRAD is available to improve the SSB audio response involving a swap of two component values. ​ This became a semi-approved factory mod. Stock audio is degraded by passing through the DSP chip when DSP is not engaged (N1EU note: "high pass filtered"​ is a more accurate description than "​degraded"​ - see [[http://​omni6.wikidot.com/​rxaudio|Omni6 rx audio discussion]]+  *An aftermarket mod from INRAD is available to improve the SSB audio response involving a swap of two component values. ​ This became a semi-approved factory mod. Stock audio is degraded by passing through the DSP chip when DSP is not engaged ​//(N1EU note: "high pass filtered"​ is a more accurate description than "​degraded"​ - see [[http://​omni6.wikidot.com/​rxaudio|Omni6 rx audio discussion]])//
   *Later 564's use significant amounts of SMT construction   *Later 564's use significant amounts of SMT construction
  

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