Re: Tektronix 465B Scope - Some problems.
OK, so you have about 25mV p-p on the vertical plate and such a CRT might be something like 4 volts per division. This would wobble your spot 25/4 milli-divisions so 0.00625 of a division.
This is just a guess at the deflection sensitivity (and it is normally the plate-to-plate differential voltage), but you could easily put a signal in, set it for 1 division peak-to-peak, and measure the plate voltage again. Compare the result to 25mV p-p and you'll really know if the deflection system is wobbling the spot.
David (designed parts of an HP scope in a previous life)
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