*excuse all the ignorance*
So I’ve been trying to build DIs with vintage transformers...UTC O1s, Triad JO-11’s, etc. Recently I got a signal generator and a scope. Hook the gen up with a 1K sine at 1V to the high imp (50k-ish) primary, then hook channels 1 and 2 of my scope up to the secondary, hook their grounds up to the ground of the transformer. Issues I’m having:
1. Scope is showing very low voltage, around 100mv...why? I have put my decade box at 50k across signal and ground of my gen, trying to force the primary to “see” a 50K load, and that doesn’t help at all.
2. Comparing channels 1 & 2 on the scope, they are NOT flipped phase UNLESS I ground the center tap...why is that? I’m under the impression the DI should be balancing the signal, flipping the polarity of what goes to the hot and cold of the XLR (channel 1 and 2 of the scope).
What am I missing here?
I’m sure this is operator error. Help! Thanks!
So I’ve been trying to build DIs with vintage transformers...UTC O1s, Triad JO-11’s, etc. Recently I got a signal generator and a scope. Hook the gen up with a 1K sine at 1V to the high imp (50k-ish) primary, then hook channels 1 and 2 of my scope up to the secondary, hook their grounds up to the ground of the transformer. Issues I’m having:
1. Scope is showing very low voltage, around 100mv...why? I have put my decade box at 50k across signal and ground of my gen, trying to force the primary to “see” a 50K load, and that doesn’t help at all.
2. Comparing channels 1 & 2 on the scope, they are NOT flipped phase UNLESS I ground the center tap...why is that? I’m under the impression the DI should be balancing the signal, flipping the polarity of what goes to the hot and cold of the XLR (channel 1 and 2 of the scope).
What am I missing here?
I’m sure this is operator error. Help! Thanks!