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BigDave & I have one of these on the bench & have determined that there are shorted turns in one of the T5 Horiz. Blocking Transformer (HBT) windings. Sony's part number is 435-003 with alternate 1-435-003, solid Unobtainium with no Stancor, Merit, etc. sub listed. Is anyone familiar enough with the set to know the exact technical specifications of the part (turns ratio, etc.) to assist in finding a suitable replacement by matching the electrical specifications to some readily available part (small audio interstage transformer, etc.) that would satisfy the requirements of the circuit for proper operation?
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