R.A.F. Henlow Signals Museum Exhibits

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Meter Volts DC Weston Model 45	Missile part of Tomahawk	Modulator Type 169	Monitor Crystal Type 2	Monitor Crystal Type 4A (Tropical)

Modulator Type 169

Part of the Automatic Gun Laying Turret (AGLT) equipment carried by heavy bombers which also carried H2S. It was used to provide the rear gunner with data
on any attacking enemy aircraft so as to assist him with training his guns on unseen targets with an accuracy of half a degree. The AGLT equipment was also
known as "Village Inn" or "Z-equipment", the RAF designation being ARI5559.

Modulator Type 169 (Photograph Number 0138)

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