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TRANSISTOR
MUSEUM ™ Historic Transistor
Construction Project Valandy 1950s
Code Oscillator Kit |
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Here is
another top view of the completed Valandy oscillator, modern version. As you can see, a simple practice key has
been included, as well as a separate set of connections for a more
professional external key. The 1 ½ voly
battery should last for many months and, in fact, otherwise “dead” batteries
work just fine because of the low current requirements for the oscillator. The tone produced in the vintage magnetic
earphone is clear, stable and very pleasant.
I used a selected 1950s CK718 Raytheon germanium hearing aid transistor
for the sake of authenticity. The CD case
used as the construction base for this kit offers a simple, inexpensive method
for displaying your completed handiwork.
You can find more details, vintage transistors, and even pre-printed CD case templates similar
to that shown above by visiting the Museum Store at: http://www.transistormuseum.com
. ENJOY YOUR VALANDY OSCILLATOR! |
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Copyright
© 2003 by Jack Ward |
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