Or, use your
The pinger is supposed to ping at 37.5KHz. The detected pings were at 33.3KHz. The company is quoted as saying the frequency can drift towards the end of the device's 6-year shelf life. However, as a long term EE, I do not know of a frequency control technology that would be so bad as to allow the frequency to drift 10% !! Even the worst quartz crystal would only drift around 0.001% 10% is gross. I hope a qualified EE has evaluated the Black Box design to see if such a huge frequency drift is possible, otherwise the search is barking up the wrong tree.
RICHMOND, Va. (AP) — A jury has been selected for the corruption trial of a former Virginia …
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