Tag Archives: multimeter

HP-410B vacuum tube multimeter

This VTVM is usable upto 700 MHz and with a given correction up into the GHz range. It was at the time of design one of the best benchmeters. That was the 410A, the competition was the GR-1800A that I … Continue reading

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Philips PM-2420 nixie DMM

A very nice Philips meter, probably made in 1968. It is a digital meter with nixies as display. A big contrast with my HP-410B, a huge vacuum tube equipped analog meter build in the same year.  The meter only has … Continue reading

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