COIL, Aerial Tuning No. 2 A ZA/CAN 4725
When removing the front panel from the Coil, Aerial Tuning Unit No. 2 A, it is important to remember the Tuning Counter Dial assembly is fitted to the Front Panel and will come off the Coil Chassis assembly with the front panel. If the Tuning Counter gear box gets bumped at all, the calibration between the dial readings and the actual position of the tuning V-Wheel along the coil will be lost. Not a good plan.
Before removing the front panel, it is best to dial the counter back down to its ‘0000’ position, which places the V-Wheel against its Stop at the left end of the Coil. See the first two photos attached.
The interface between the Dial Counter gear box and the Coil gear box is a simple, black Bakelite disk, free floating between the two gear boxes. It will easily fall out when the two gear boxes are separated. See the 3rd photo.
The simple solution is to tape the Bakelite Coupling to he Coil Gear Box arm, so it stays with the Coil Gear Box on the chassis. Then, also tape the Dial Counter Drive shaft to the back of the Dial Counter to keep the Dial Counter held in its ‘0000’ position. See the last two photos.
With all this prep work done, the front panel on the Coil, Aerial Tuning No. 2 A can be removed from the coil chassis.
David
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