Quartz control set for P and K stations; manufactured by Zellweger, Uster.

• Principle: quartz-controlled crystal calibrator
• Frequencies: 18.5 MHz, 23 MHz, 27.75 MHz

• Batteries: Combined anode / heating battery Leclanché 1266, 126 / 6 Volt or hand cranked generator

• 9.7 kg

• Standard aerial is a rod aerial made of 9 plug-in tubes

The set installed in the cabinet of an "P set" is used to calibrate the Zellweger radios of the P and K1A series.

Quartz-controlled signal generator

• Six KF4M valves

The quartz control set was developed by Zellweger, Uster to calibrate the sets of the P & K1A series.

At the end of the 1940s, 20 units were procured.

I would be grateful for additional information and images to complete the website. I am also interested in purchasing a Q.E.G..