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1951 Zenith Porthole Television Set Owners Manual (continued)
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The last point that we wish to bring out in connection with the Station Selector Switch on your new Zenith is the fact that Zenith designers have provided for the simple addition of new tuning elements into your receiver. Thus when the new high frequency television channels, now under consideration by the Federal Communications Commission, become available under present standards, your Zenith can be easily adapted for their reception. In this way you are assured of the ability to keep pace with the growing television industry.

COMBINATION ON-OFF SWITCH VOLUME CONTROL

The operation of this control is one that should be familiar to all. Clockwise rotation turns the receiver on and increases the volume, counter-clockwise rotation diminishes the volume and if continued until a click is heard turns the receiver off. In speaking of this control we wish to bring out the fact that it is important that the receiver be turned on and allowed to warm up for a period of at least 30 seconds before you wish to use it.

PICTURE CONTROL SWITCH

The Picture Control switch located immediately below the picture screen allows you to have either the Giant Circle picture or the smaller conventional size (Fig. 2) -whichever you" choose. This change can be made instantly and as often as you like.

Zenith Giant Circle "Conventional"

Figure 2



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