6534-3 Attenuator

Here is an example of a coaxial attenuator produced by the MI Sanders Division. It was made under licence from Weinschel Engineering.

This particular one has a nominal value of 10 dB and a frequency range of DC to 12.4 GHz. The engraved plate on the rear of the device suggests that the variation in attenuation over this frequency range was about 0.1 dB.