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Re: Akula, Ruslan, Stalker, device discussion and replications. « Reply #459 on: 2023-08-04, 10:21:30 »
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Quote from: NickZ on 2023-08-03, 22:32:04
Max:
I'm not sure what I see. Nor is the Kacher running at 1MHz.
What are you trying to show? Fish waves?
Anyway, try to show how well any of your ideas work, on a load. Not on mV input.
Otherwise....A scope shot of something running at 414KHz is not very convincing.
As that is not even the normal running frequency of these devices. So, not sure what your point is.
NickZ
Nick,
Max, is only showing a nice example of an interrupted kacher signal.
His scope is not interpreting the frequency (414kHz) correctly somehow, not sure why, but as i have shown you before, you can calculate the used frequencies shown yourself.
The first picture shows the single ringing of the kacher at M 2.50us, meaning his scopes time base is set to 2.5us/division.
If you take 1 period of that signal (like 2 peaks next to each other) you can see that this single period lasts about 1.5 subdivisions.
As 1 subdivision = 1/5th divisions = 0.5us, then 1.5 subdivision is 1.5 x 0.5 = 0.75us which is 1.333MHz (
https://www.calctool.org/waves/frequency)
Max his Kacher is therefor running at 1.333MHz, not the shown 414kHz.
The second picture shows the interrupted signal with the time base set to M 25us.
Between 2 interrupts we have 1.6 division, thus 1.6 x 25us = 40us which equates to a frequency of 25kHz (so not 15kHz).
That the kacher signal is in the mV's only, is probably because Max is having his pickup probe some distance away from the kacher or antenna.
So what Max is showing is an interrupted kacher signal running at 1.333MHz interrupted at 25kHz intervals.
Itsu