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Very High Gain Crystal Earphone Amplifier - This simple, one-transistor
amplifier provides a voltage gain over 1000 (60 dB) for driving a high
impedance ceramic (crystal) earphone. The high gain is achieved by replacing
the traditional collector resistor ….(added 04/05/06)
VLF Natural Radio Reception - "Natural Radio" is a fancy name for radio
noise with natural origins, mainly lightning. At first, you might think that
listening to lightning crackles is pretty uninteresting but as it turns out,
electromagnetic radiation from lightning can travel great distances and
undergo strange modifications along the way...(added 08/08/08)
Wireless Radio Data Link - This is a description of a very simple unit designed
and constructed for use as a wireless data connection between two nearby computers.
The error rate is excellent over short runs, and the transmission speed means that a
useful PPP..... (added 6/06)