A Discussion and Demo of my HP 3410A Selective Microvoltmeter and measuring low level AC voltages.

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In this video:
I chat about the purchase and damage / repair to an HP 3410A Selective Microvoltmeter. I discuss the challenges of measuring really low AC signals / voltages.
This is a prelude to a video about measuring the SNR (signal to noise ratio) of audio equipment. In that video I will demonstrate the capability of the following meters:
* Handheld multimeters
* The Rigol 3068 with a claimed noise floor of 5 uV.
* The HP 3458A
* The HP 3400A
* The B&K (Bruel & Kjaer) Type 2609
* The HP 3410A
* A "secret" German device from the 1980's that will measure down to around -130dBm / -144dBV / ~50-60 nano-volts.
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