1960s Type 1602-B General Radio Company UHF Admittance Meter

This strange looking instrument is a 1960s Type 1602-B General Radio Company UHF Admittance Meter Serial Number: 4221. It could measure admittance and impedance, and be used to determine the reflection coefficient on a 50-ohm coaxial line.

In fairly good condition, with some surface blemishes, it is supplied unboxed and without any additional accessories. It has not been tested.

Approximate Size: 

• Base Width: 9 cm 
• Base Depth: 13.4 cm
• Max. Depth: 14cm 
• Max. Height: 17.5cm
• Max. Diameter: 12.5cm

Instruction manuals are available to download from the internet.

The 1602-B measured admittance (0.01 to 10,000mmho) and impedance over a wide frequency range (40-1.5GHz) in antennas and transmission lines. As a null instrument it also measured the conductance and susceptance (+/- 200 mmho) of an unknown circuit directly. 

Millimhos, or mmho, is an old unit of electric conductance equal to one thousandth of a mho. It is used to measure how well a material can conduct electricity.

1 mho = 1 siemens = Ω^-1  

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NB: Accessories shown are for photographic purposes only and are not included in the sale.