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Fluke RF Probe
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Topic: Fluke RF Probe (Read 480 times)
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mojoe
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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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stevebyan
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Re: Fluke RF Probe
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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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