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Input of a 21.25mc 0.1V (and up) RF signal swept symmetrically 1mc into the grid (Pin 1) of the 2nd sound IF and the scope Y input from the junction of C183 and R215. Generator sweep output to the horizontal scope input. Regardless of the fuzzy signal, I was not able to get the Fig. 15 symmetrical positive/negative trace with adjustment of T-113.
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