[Elecraft] KX1 D2 Voltage checks high

[Don Wilhelm]

Steve,

Those AC voltage measurements are intended to check your power supply 
ripple voltage (and noise pickup).  The AC is *NOT* coming from the KX1 
and is not an indicator of any KX1 problem.

The solution is to use a cleaner power supply.

If you are using one of the 'wall-wart' type power supplies, *DON'T*. 
Use a good regulated power supply or a 12 volt battery (gel cell or other).

73,
Don W3FPR

Steve Watkins wrote:
> The voltages I'm seeing on both the cathode and anode of D2 are higher than called for in the manual.  I am seeing  approximately 0.225 volts a.c. on one end and about 0.110 volts a.c on the other end of the diode.  Pins #1 of U1 and pin #6 of U3 show about 3mv.
> 
> I rechecked to assure the three capacitors mentioned in the note at the bottom of page 28 were installed in the correct orientation, and also rechecked the solder connections.
> 
> The note mentions stray a.c. may be being picked up as noise and to try a different DMM.  I do not have another DMM at the moment to check it with.
> 
> Any ideas from my Elecraft family?
> 
> Should I continue on or not proceed until I get this corrected or checked with a different DMM?
> 
> Any assistance would be greatly appreciated.
> 
> Thanks, Steve
> NE7RD
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