Talk:SELCAL

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In all the references to the timings, I have found out that the first 2 tones are sent out for 1.25 seconds, followed by a gap of 0.2 seconds and the last two tones broadcast for 1 second.

--Kielhofer (talk) 16:34, 25 September 2009 (UTC)[reply]

SELCAL32 went into effect yesterday, April 2nd. The tones now go all the way to Z, omitting some letters, then the figures 0-9. The extra frequencies needed are mostly in the wide gaps between the existing tones, meaning that the tolerance of the whole system has been reduced to (I believe) +/-5 Hz. 2603:8000:AE01:FC59:8CE4:2AED:38E4:7F8 (talk) 23:14, 2 April 2023 (UTC)[reply]

https://www.selcalweb.co.uk is offline since 2013. 2A01:C22:D565:4100:98E1:7838:7CAB:641B (talk) 01:30, 20 April 2023 (UTC)[reply]