1-Transistor Radio

 

1-Transistor Radio

 

      At age 14, Steve Hines built a 1-transistor radio using the schematic in Radio-TV Experimenter magazine, and packaged it to make it practical to carry, worked out the printed circuit pattern to minimize cross overs, and etched a printed circuit by painting the design, using a chemical resist, with a small artist's brush and chemically etching away the copper.  Then holes were drilled, and parts were mounted and inserted into a red plastic cigarette case.  Tuning was done by threading the ferrite core in and out of a coil capacitor.  There was no volume adjustment.  It was very exciting, as a 14 year old, to tune in a station 450 miles away on a radio that you made yourself.  The design and parts were crude by today's integrated-circuit standards, but lent themselves to experimenting and learning electronics.

 

Transistor-Radio-Science-Mechanics-article


 

      This is not a product being offered for sale to end users.  Contact Steve Hines with questions:

HinesLab, Inc.
Glendale, California, USA
phone: 818-507-5812
email: Steve@HinesLab.com