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Classroom Practice Oscillator
This is a good quality CW practice oscillator .It uses a different chip and circuit than the  orginial SPO-1. This offers a smoother / louder control of the volume, a better tone quality and more stable frequency over the full volume range. A great choice for anyone undertaking a construction project as part of a Ham Radio training course.
The kit is complete with a 50mm loudspeaker, all parts and high Quality PCB.

Tutor Features
Classroom Practice Oscillator  SPO-2
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Full Kit Instructions can be downloaded here (Use these to make your own if you wish


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Kit with all board mounted parts, Volume control and speaker


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