Erik,
Yes, using auto ranging on the DMM can cause false readings. Try to set
the fixed range a bit above the highest expected resistance for the best
results. It all depends on the voltage the DMM applies to the circuit.
Too high a voltage can make ICs and transistors conduct causing a low
reading.
73,
Don W3FPR
On 5/24/2021 5:52 PM, Erik Tkal wrote:
Hi Don,
Everything appears correct and in place, already used magnification to
check, and individual resistors all seem to measure correctly. I
still think it's my multimeter in auto mode. I went back and retried
the initial test using manual ranging and if I set the range to 600K
it shows a reasonable value. I suspect the caps in the circuit are
fooling it, will have to google that and see if there is an
adjustment. The second test still shows a bit high as well, but if I
measure from the *cathode* of D3 instead of the anode then I get a
reasonable value as well; perhaps the difference in meter currents
used for measurements is messing up due to the diode being in the
circuit as the check is worded?
Thanks and 73,
Erik Tkal - W1QED
On May 24, 2021, at 15:32, Don Wilhelm <d...@w3fpr.com
<mailto:d...@w3fpr.com>> wrote:
Since that is the case, check the value of the resistors and check out
the soldering under magnification.
73,
Don W3FPR
On 5/24/2021 3:08 PM, Erik Tkal wrote:
Hi Don,
Nope, D3 and D4 are correct, and the LEDs check out per the test...
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