K3 assembly, resistance checks

[Mike Markowski-2]

Hi all,

In the K3 Assembly Manual Rev L, I reached the point of doing resistance
checks on pages 44 and 45.  Of the 4 checks all are fine except for U12.
 Instead of getting a resistance reading on my digital meter, it never
settles down.  It cycles through a range of values up through the Mohm
range.

Does this sound like a meter issue or a problem?

Thanks for any advice,
Mike ab3ap

Readings:

Across 12 VDC IN: infinite (should be > 3 kohms)
R36/gnd: 240 ohms (> 150 ohms)
U13/gnd: 424 ohms (> 150 ohms)

U12/+5V leg: cycles through readings
U12/+12V leg: 240 ohms
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[AC7AC]

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[Mike Markowski-2]

Thanks for curing my builder's paranoia, Ron.  That's all it was.  :-)

Mike ab3ap

On Aug 3, 2010, at 11:18 PM, Ron D'Eau Claire wrote:

> ...It sounds like
> your meter is supplying enough voltage to start to turn some junctions "on"
> so they draw more current resulting in a lower resistance, then your meter
> switches ranges to one with less voltage and they again turn "off" and so
> on.
>
> Try using a manually-selected fixed range and see how it acts.
>
> Ron AC7AC
>
> -----Original Message-----
> [mailto:[hidden email]] On Behalf Of Mike Markowski
> Sent: Tuesday, August 03, 2010 7:57 PM
> To: Elecraft
> Subject: [Elecraft] K3 assembly, resistance checks
>
> ...Of the 4 checks all are fine except for U12.
> Instead of getting a resistance reading on my digital meter, it never
> settles down.  It cycles through a range of values up through the Mohm
> range...

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