Front view of a Repeater Panel. Built on a 19'' x 10.5'' steel panel, each repeater weighed 50lbs. It shows the typical construction of the equipment at that time. The maximum gain of this example of a repeater is 42db. Gain adjustment was achieved by altering the position of the grid tap on the input transformer secondary winding. This gave coarse adjustment of around 5db per tap. Whilst fine adjustment was achieved by altering the grid tap on the inter stage transformer, these taps were wired out to a large rotary stud switch. This gave an adjustment of 1db per tap.
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Rear view of a Repeater Panel. Wiring was carried out using cotton-covered enamelled copper wire. The output of the repeaters would not have been adjusted to give more than +10db. For example, with an input of -32db, and with the repeater set to maximum gain, the output would be +10db. High output levels would give cross-talk problems on the cables.
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