seasons greetings to all on the list.

thought I  would do some listening / looking for QRSS

need to calibtate RX for 137.7890 and 137.700 . last summer RX appeared to
be off frequency by 20/30 hz

can see Rtty signal with tones at 136.970 and 137.040 this morning.

can someone please advise the exact frequencies they are on so I can
calibrate  system.

Are there a couple of loran lines to calibrate on closer in to the
operating frequency of QH when Argo is set to 60 sec mode.

thanks
peter g8afn

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