Re: Oscilloscope delay line question
Yes, you need to get the phase right or the Y deflection will be reversed. The Y amplifier is usually a pair of opposite phase, DC coupled amplifiers each driving one of the Y deflection plates. I don't have the manual for your scope but usually the delay line is resistively terminated in its characteristic impedance so you will measure 50 - 100R to ground from each of the conductors and double that between the pair of inner wires. You also probably have a common base transistor as the input to the next stage so in one polarity you have a forward biased junction as well. If you really have 0R either to ground or between the inner conductors then something is seriously amiss.
Roger
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