The lowest risk Kraken DOA bundle for special relativity experiment?

[jabowery]

@Vadim

Usually I try to get a signal strength of about -30 dB at the module input. Such a strong signal is usually not found in the lab from other signal sources, and therefore selectivity is not required.

This is what I use in my local experiments to get high signal strength:

@Vadim

I wonder what the signal from the plasma antenna looks like on the PC screen in the SDR receiver program. What is the signal level and what does its spectrum look like.

With the 500mW Tx at 108.0MHz

The outputs of the AD8302 are
+VP 0.95V (relative phase)
VREF 1.51V (voltage meaning 0 phase difference)

However, this cannot be taken to mean there is any real phase difference because the same outputs are present when the plasma power is off (and the same signal level in the SDR).

My attempt to run a control experiment using a T connector to a single antenna, which should produce a VP+ voltage = VREF, does not do so unless I hold the antenna as I describe in this video:

AD8302 failure to detect exact in-phase signals

If, as you say, -30dB is required at the AD8302 input, I’m not sure I’ll be able to achieve this without being so close as to be subject near field effects.

For field experiments, I’ll be in about 1km from FM broadcast towers, which may provide all the power I need.

I am a bit concerned about the KrakenSDR hardware though since people continually warn about avoiding nearby powerful transmitters.