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Help me get a HP instrument model number

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flatulent

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site:edaboard.com vector voltmeter

Some years ago HP sold a one port impedance meter that went up to 110 MHz. It was all analog with two analog meters showing magnitude and phase. The frequency was set with a range switch and rotary knob.

What was the model number of this instrument?
 

Re: REQ HP model number

Maybe you're thinking of the HP8405A Vector Voltmeter? Freq range is 1 to 1000 MHz.

**broken link removed**
 

Re: REQ HP model number

It is not the voltmeter I want. The instrument had a single probe and a hole in the front panel with a 50 ohm load. The probe would mate with this hole to calibrate the instrument. The 4193A was a subsequent all digital version.
 

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