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Hi.
I assembled epe lcf meter,but I have a problem in inductance mode.
I had no chance to obtain exact inductor's value.
Trimmer VR2 is set to 0 ohm.I shorted the probes,pressed null-button and then I placed 47uH inductor.
I obtain only 44uH.If I place 330uH I obtain 311uH.
With VR2 turned on...
Hi!
Now my meter seems to work.I replaced all 1K 10K resistors with others with tolerance 1% and lf412 with tl082.Then I put 3k 30k resistors where required.I welded the probes directly on pcb,because streep line affect measure.Now I measure 0.996-1.002 for 1 ohm and 9.984-10.014 for 10 ohm...
Hi!I built a power supply pcb with two batteries,I checked voltages and these are right,then I did measure of current.I connected tester between A733 collectors(disconnected from VT2) and ground and I put R3(RC0 side) to ground.I removed cpu from socket.I measure 0A.Why?
Hi!Thanks a lot for reply.
In fact when I measure -5V without load I get -4.99V but with load I get -4.34 so this voltage are not stable.Exactly where can I measure 10mA current on circuit?Which points?
Hi to all forum's members.
I built go esr meter,dip components version.I used two lf412 in place to tl082 and a ceramic resonator ZTA 20.00MX+two ceramic capacitors of 22pF,in place to quartz resonator.For the power,to make -5V I used icl7660.I put coefficient 1.050 for 1 ohm and 0.960 for...
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