Andre
"Printboard with two HAUFE Audiotransformers ?RK 173? for linelevel applications. Haufe transformers were widely used in german broadcast technolgy of the 50´s and 60´s and can be found in numerous german audioclassics, such as Telefunken, TAB, Siemens etc.. mu-metal shielding, winding ratio 1+1 : 1,2 , further technical details are not available to me. Connecting Plug, and pin description included."
From
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