‘The monitor type 28 is a test equipment designed to assist in the servicing of airbourne Radar installations employing a 20uS prepulse as the basic driving waveform.’

In reality, the device is very similar to a cathode ray tube oscilloscope, but with settings and specific testing facilities to be useful in the servicing of the Bomber Command H2S radar sets.

The Monitor 28 in our collection was received in a pretty poor and incomplete state as can be seen below. For once it ws nice to find that the tube was intact and worked well. The equipment was probably the easiest to rebuild in our collection as everything was similar to that found in an ordinary 1940s oscilloscope with a few small differences and tweaks. As with all the Radar Room exhibits, we expect to show it working, so it was immediately pressed into service to help explain how a typical IFF (identification - friend or foe) setup works.