[ARC5] Crystal Question

[J. Forster]

> Good Morning (UTC +1 time),
>
> Re my comment yestereday about metal-on metal
> rectifying RF:
> One of my experiments was using the contacts
> on my J-38 and home brew keys as detector
> by adjusting the spacing so that the
> oxidized contact surfaces barely made contact.
>
> On the more curious side, some have experienced
> having there tooth fillings function as detectors of broadcast
> signals.
>
> One of the causes of TVI often seen in densely populated areas
> is the fact that overlapping metal objects (e.g. rain gutters) not
> having good galvanic connection will rectify RF transmissions
> and create harmonics.


This is certainly true. A friend lives near a few powerful AM stations and
gets third order mixing products all the time. He has spent weeks chasing
then down.

Best,

-John

==============


> BTW didn't early radio detectors also include liquid electrolytic
> solutions?
>
> Henry, Cph.