• Still a lot to be said for old technology (HP 432A RF power meter)

    From Cursitor Doom@21:1/5 to All on Mon Apr 1 18:09:40 2024
    It's probably just my ignorance on this subject, but I find it
    remarkable how fast this HP thermistor is able to respond to even
    minute changes in temperature caused by variations in applied power.
    To my eye, the change is instantaneous. The meter needle flicks
    between different readings in the blink of an eye as the power is
    varied. I'd have expected some degree of thermal lag. I mean we're
    talking about only very tiny power levels like -30dbm. How much heat
    does that generate into 200 ohms? Yet any change is apparent with zero noticeable delay.

    https://disk.yandex.com/i/gUgUim-KogCOBw

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