On Monday, 17 July 2017 11:21:54 UTC+1, Cursitor Doom wrote:
On Mon, 17 Jul 2017 02:50:34 -0700, tabbypurr wrote:

My 1920s v/i meter weighs a small fraction of that. Avos were high
impedance accurate bench meters.

"High impedance" back then, yeah.

They were, you could always get lower resistance meters for a lot less. Why it took so long for analogue meters to get FETs I don't know. My 1920s meter is moving iron, so the resistance is dreadful & it's nonlinear. But its worst shortcoming is that the case is the -ve electrode, you hold it in your hand and it's bare metal. AND it's low resistance, so measuring radio/TV HT was always a fun experience. Maybe they figured if they killed their customers there wouldn't be any requests for refund.


NT