I also like the HM605, I bought a new one in 1982 and I still use it.
I have earned my life for over 10 years with it, it has been my workhorse in repair and project of power electronics.
Later, I bought others, I now have 4 units in good working order.
Some little known details:
- the older HM605s have a different cathode ray tube than the newer models. I find the old cathode ray tubes better than the new ones
- the HM605 has a very fast overscan detector ... it can detect extremely fast transients or glitches not visible on the screen with low scanning speeds. Don't forget to use it !
- the HM605 has an Y output on the rear panel which allows to measure the frequency of the signal of channel 1 with a frequency counter .... very convenient because it is not necessary to adjust the sensitivity of the frequency counter.
- the HM605 has a wide range of Y sensitivity adjustment : from 5 mV / cm to 20V / cm (probe x1) ... the sensitivity can be multiplied by 5, giving a maximum sensitivity of 1 mV / cm.
The vertical amplifiers accept a large overload without saturation, which allows to visualize a detail of the waveform using the offset adjustement.
- the HM605 has only one time base (which simplifies the device very much) but it has a delay that allows to start the sweep at a very precise point of the wave even if one does not succed to sincronize the sweep at that place.
This is an original solution that is often enough.
- the HM605 is very easy to use and sincronises particularly well, it is rare that it is necessary to adjust the sinchronism.
- the HM605 has a component tester very useful for troubleshooting ... when one is used to use it, one can not do without it!