25 Mar
2019
25 Mar
'19
3:15 p.m.
This came up on Twitter recently. [1] When I first started using SO-50 I assumed once the transponder was turned on with the 74.4 Hz tone it would stay on as long as it was being used (people are uplinking with a 67 HZ tone), but in fact it turns off every 10 minutes regardless of activity.
If you ever hear it go silent in the middle of a busy pass try sending a 74.4 hz tone to reset the timer/turn the transponder back on.
73, John Brier KG4AKV