[Elecraft] [K2] RF Board: R115 resistance check

[Don Wilhelm]

  Pippo,

Try reversing the leads of the HP3478a and re-measure.  Diode D12 is 
connected, and the polarity of the HP when measuring resistance may be 
such that the diode conducts.

73,
Don W3FPR

On 1/19/2011 5:36 AM, Giuseppe Sorrentino wrote:
> Hy to all, just finished the resistance check of RF Board (K2 #6995) as on page
> 62 of the manual. I've dne the check with two gears, an HP3478a and an Extech
> 470 (handheld dmm). I have different values as indicated down here:
>
> HP
> R115 160 ohms (ref.is>500ohms)
> U6 PIN 8  290ohms (ref is>100 ohms)
> U4 PIN 16 3,4 K (ref is>1k)
> U11 PIN 8 0,7 K (ref is>250 ohms)
> U10 PIN 8 5,19 K (ref is>500 ohms)
> U12 PIN 1 0,58K (ref is>500 ohms)
>
> EXTECH
> R115 3,7K ohms (ref.is>500ohms)
> U6 PIN 8  290ohms (ref is>100 ohms)
> U4 PIN 16 3,4 K (ref is>1k)
> U11 PIN 8 1,1 K (ref is>250 ohms)
> U10 PIN 8 230 K (ref is>500 ohms)
> U12 PIN 1 2,43 K (ref is>500 ohms)
>