Drake 784-389 OT
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acdsee
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Drake 784-389 OT
Hi i have a jtm45 '89 first year pruduction with Drake 784-389 OT and 5881 tubes and i would like to convert it to jtm50 specs with el34 tubes.I cant find nothing about OT specs and if anyone can help me with some info about this transformer and especially primary impendance value(kohms).