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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