Tube❄TimeMar 9

RE: https://flipboard.social/@newsguyusa/116199894233969019

from day 1 I suspected microwave radiation. my theory was that it was microwave excitation of a passive bug, something like the infamous bug the Soviets planted in the Great Seal.

Show threadTube❄TimeMar 9
but this is also from a state-run propaganda outlet, so who knows.
Show threadTube❄TimeMar 9
it is interesting to think about a microwave pulse generator with a focused high gain antenna. short pulses could be hard to detect with a traditional spectrum analyzer, particularly if the frequency jumps around
Show threadMarsh RayMar 9

@tubetime But would short pulses allow one to obtain intelligible audio?

Or would it simply be used to charge a battery and-or activate a high bandwidth download?

Show threadJohn-Mark Gurney
@marshray
Actually if you did sub -microsecond bursts at 8kHz, you could probably get fine audio if it was sample and hold type.
@tubetime
Mar 9 at 11:12pmWeb
Show threadMarsh RayMar 9
@encthenet @tubetime I could see that, but you’d still have to increase the power to compensate for a smaller duty cycle.
I’m no expert, but it seems like any beam transferring enough power to usefully charge an energy storage capacitor or battery ought to stand out on an SA.
Show threadJohn-Mark GurneyMar 9
@marshray
Assuming you were close enough to the beam probably, but the narrow beam is to hopefully avoid that. And with a narrow enough beam the ERP can get quite high.
@tubetime
Show threadLaberpferdMar 10

@encthenet
even better you could use a pseudorandom pattern of pulses, to an receiver who does not know the pattern (to synchronously control the sample and hold stage) this appears as just some noise but gives no hint to an active microphone

@marshray @tubetime