View single post by Dr. Heinz Doofenshmirtz
 Posted: Dec 18th, 2014 04:52 AM
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Dr. Heinz Doofenshmirtz



Joined: Nov 17th, 2013
Location: Liberty, Missouri USA
Posts: 300
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 Balderdash! The Insensitive and unreliable demodulation of RF is the point of THIS application.

The elemental composition of the graphite, the sharpness of the pencil "lead", angle, pressure, placement,  the microscopic deposits left on the razor, AND intent, all factor into a once in a lifetime, non-reproduce-able, random, manual sweep of the diode itself.

Analog linear or random voltage sweepers are sweeping varactor diodes, not the detector. The varactor diode changes capacitance when reverse voltage is applied. They generally take the place of the tuning capacitor.

A fixed coil and detector diode, with no modulation of the tuning capacitance would result in a DRV method.