I had exactly the same symptons as the OP just a couple of weeks ago and it
puzzled me too. With my KX3, the "cure" for this behaviour was to change the
display settings from external voltage to internal voltage. I think that the
radio displays a default reading first and then changes during
I just downloaded the schematic from the Elecraft site. I think this style of
schematic, while space-saving, is difficult to read.
On p 9 @ B5, please find J1.
9-15VDC.
There you will see D6. I was expecting a different circuit, one that fed BAT+
and 15V+ each through a diode. That would provide
I am missing a point:
Istvan said When I plug in the 13.8V PS the radio shows 13.8V for only 1 second
and drops to 10.4V.
Don replied so the fact that the KX3 shows 0.3 to 0.4 volts lower than the
external supply is normal.
Istvan said When batteries removed the voltage shown on display 13.8V.
Don,
This value is shown when the 13.8V PS is connected. It had shown the PS
value before, have I missed something?
73, István HA4ZD
On Thu, 8 Oct 2020 at 15:58, Don Wilhelm wrote:
> Istvan,
>
> There are protective diodes in series with both the internal batteries
> and the external supply, so
Istvan,
There are protective diodes in series with both the internal batteries
and the external supply, so the fact that the KX3 shows 0.3 to 0.4 volts
lower than the external supply is normal.
73,
Don W3FPR
On 10/8/2020 2:53 AM, István Szabó wrote:
When I plug in the 13.8V PS the radio
When I plug in the 13.8V PS the radio shows 13.8V for only 1 second and
drops to 10.4V. Eneloop batteries all OK 1.29V individually. Running a 4
hour charging cycle it turns off when voltage reached and shows the
dropped voltage. When batteries removed the voltage shown on display 13.8V.
Is it
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