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Author Topic: Fluke RF Probe  (Read 480 times)

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Offline mojoeTopic starter

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Fluke RF Probe
« on: October 18, 2023, 09:09:46 am »
Does anyone know the difference between the 85RF and the 85RF II? The specs look the same. Other than people selling them, a web search brings up nothing useful.
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Offline stevebyan

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Re: Fluke RF Probe
« Reply #1 on: October 24, 2023, 03:37:44 pm »
Quote from: mojoe on October 18, 2023, 09:09:46 am
The specs look the same.
Not quite the same. The 85RF II has poorer frequency response specs over 200 MHz and a higher input capacitance (9 pF versus 3 pF). The schematic differs; the 85RF II uses two BAT41 Schottky diodes in place of the single germanium diode used in the 85RF. Both also use a single 1N4148 to linearize the response.
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