I recently changed my default zap from 21 sats to 73 sats.

'73' has a meaning in ham radio that is rooted in tradition and history.

It's not just a number — it's a time-honored way of saying 'Best Regards.' Originating from early telegraphy, this shorthand has been used by radio operators for over a century to sign off with warmth and goodwill.

So, next time you hear '73,' or get zapped 73 sats remember, it's more than a farewell — it's a friendly wish for the best.