Strange indeed, John. And I would emphasize that what matters is the total series resistance of both conductors, which would be 11.4 ohms for your 2.5 meter CT-1E, 7.6 ohms for Acman's 2 meter CT-1, and probably less than 1 ohm for Roger's 2.5 meter CT-1U.
Roger, I want to make sure I understand what you mean when you refer to the multimeter needle "barely deflecting." To measure low resistances with most analog multimeters one would set the mode to R x 1 (or some such nomenclature), then touch the meter leads together, then adjust some knob on the meter such that the meter reads 0 ohms, and then make the measurement. The 0 ohm reading will usually correspond to deflection of the needle from its rest position at the left end of the scale, all the way to a position at the right end of the scale where 0 ohms would be marked.
So a resistance of a fraction of an ohm would result in the needle deflecting nearly all the way across the scale, to a point close to where 0 ohms is indicated. Does that all sound consistent with the measurements you performed? If not, I'd be curious to know the make and model number of the meter.
Regards,
-- Al
Roger, I want to make sure I understand what you mean when you refer to the multimeter needle "barely deflecting." To measure low resistances with most analog multimeters one would set the mode to R x 1 (or some such nomenclature), then touch the meter leads together, then adjust some knob on the meter such that the meter reads 0 ohms, and then make the measurement. The 0 ohm reading will usually correspond to deflection of the needle from its rest position at the left end of the scale, all the way to a position at the right end of the scale where 0 ohms would be marked.
So a resistance of a fraction of an ohm would result in the needle deflecting nearly all the way across the scale, to a point close to where 0 ohms is indicated. Does that all sound consistent with the measurements you performed? If not, I'd be curious to know the make and model number of the meter.
Regards,
-- Al