[Elecraft] T1 Tuner Kit Control Board final check issues

[Don Wilhelm]

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 <don at w3fpr.com 
> <mailto:don at 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...
>
>