Vintage Radio Tuning Mechanism

Posted by barnoid Tue, 28 May 2013 23:40:14 GMT

This is how the tuning works on an early sixties Philips radiogram. As I turn the knob it rotates the black disk which has a spiral groove. The horizontal metal bar has a peg in the groove so it rises as the disk turns. Wires run from the bar to the cores of several inductors so that it pulls them up through the inductor as it raises, changing their inductance and the frequency of the circuit they are connected to.

Trevor Baylis at Brighton Fablab Event

Posted by barnoid Thu, 21 Jul 2011 18:21:54 GMT

Trevor Baylis at Brighton Fablab Event
At the Fablab Brighton project launch event.
MakeCanon
ModelCanon EOS 5D Mark II
Exposure0.025 sec (1/40)
Aperturef/4.0
Exposure ProgramProgram AE
ISO Speed1600
Date and Time (Original)2011:07:20 18:33:24
Exposure Bias0 EV
FlashOff, Did not fire
Focal Length70 mm
QualityRAW
Metering ModeEvaluative
Lens TypeCanon EF 24-105mm f/4L IS
Camera Temperature27 C