Hello Chris, Andy,

I have a signal on 478.477 kHz on my overnight recording, which 
should be VO1NA. At a slow speed waterfall it looks like QRSS, but I 
gather it is OP8? See attachment.

It is clearly audible in a 20 Hz bandwidth, so signal strength 
should not be a problem, I guess.

73,
Roelof

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   ---- File information -----------
     File:  VO1NA 478.477 kHz.jpg
     Date:  14 Apr 2017, 12:36
     Size:  14971 bytes.
     Type:  JPEG-image

VO1NA 478.477 kHz.jpg
Description: JPEG image