i agree that you missed the "test feature" without the feedback disabled..
but in "live mode" if i was stuck somewhere..it might be useful information if you expect to get picked up "any time now"...
maby the piezo would give off a warning about it ?
i actually have a "no micro all discrete through hole" circuit board from a far older aviation one. somewhere around here.....
Edit: yup.. it was around here somewhere. All discrete. missing part in the top middle is the 121.500mhz xtal
and not that i have ever had it turned on of course....... or well if i had.. i would have done so in the approved
short ELT Test periode of the first 5 minutes of every UTC Hour....
hrmph.. anyway "mod" is where the modulated sweap might be found
oh and ya... even with the antenna disconnected.... im pretty sure an overflying airplane would hear it...
the new digital 406mhz ones still give the same analog burst on 121.5 and 243mhz
for local homing using existing equipment. and for aircraft flying overhead.
that are still monitoring 121.5 because its used not only for these transmitters.
but also for aircraft distress "mayday, panpan" calls, and intercept procedures
effective February 1, 2009, COSPAS-SARSAT satellites will only detect 406 MHz ELT signals.
/Kyndal