Telequipment Type A

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The Telequipment Type A plug-in, also known as the 43A, is a 15 MHz vertical plug-in for the D43 and S43. The Type A is four-stage fully differential DC-coupled all-tube amplifier. The input impedance is 1 MΩ in parallel with 40 pF. The Type A drives the CRT deflection plates directly via ECC88 cathode-followers.