Turret attenuators
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In a Turret attenuator, individual R/C attenuator elements are rotated within a cylindrical housing whereas the external contacts stay stationary.
They were used in the Type H, Type Z, 516, and 1121 and are known to give trouble in the form of intermittent electrical continuity at the contacts. Also, the plastic used in the turrets is easily melted if a soldering iron gets anywhere near it.
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Turret attenuator of a 1121
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Type Z attenuators circuits
