08-06-2024, 06:27 PM
Arriving Monday. Under £4 each inc shipping and VAT.
One option seems to be to power it from the voltage being measured. That's OK for a car or truck, but not generally sensible. However it does seem to have a "separate" power option. If the current -ve is common to voltage meter negative, then the current + terminal is the load negative. Awkward for a dual HT supply feeding some device or circuit under test with a common negative. Like a Tetrode, Pentode, Hexode etc.
I have some LM3900 so called Norton mode "op amps" that can sense drop in a small series resistor at HT. They then can drive a 0V referenced current meter. Obviously they can directly measure current in the FET shunts.
One option seems to be to power it from the voltage being measured. That's OK for a car or truck, but not generally sensible. However it does seem to have a "separate" power option. If the current -ve is common to voltage meter negative, then the current + terminal is the load negative. Awkward for a dual HT supply feeding some device or circuit under test with a common negative. Like a Tetrode, Pentode, Hexode etc.
I have some LM3900 so called Norton mode "op amps" that can sense drop in a small series resistor at HT. They then can drive a 0V referenced current meter. Obviously they can directly measure current in the FET shunts.
