[Elecraft] KX3 power supply

[John Kramer]

Thanks for the info Bob, and it’s reassuring to see that the KX3 has protection for 
over voltage.
One caveat with this PSU - I just tried to insert the DC plug from this  PSU to the KX3, 
and I see it is too large for the KX3. Not a big deal, I will just cut it off and fit the correct
size DC plug

73

John, ZS5J




On 18 Jan 2016, at 11:09 PM, Bob N3MNT <bob at hogbytes.com> wrote:

The KX3 will shut down if the voltage is too high.





Someone on this reflector suggested a power supply off eBay, that could be used 
with the KX3 about 2 months ago. It is intended for Toshiba laptops. So I bought one, 
this is the one…

http://www.ebay.com/itm/15V-5A-AC-Adapter-Charger-Power-Supply-For-Toshiba-Tecra-A6-A7-A8-A9-A10-Laptop-/381356162365?hash=item58ca993d3d:g:Yk0AAOSwMmBVxX22 <http://www.ebay.com/itm/15V-5A-AC-Adapter-Charger-Power-Supply-For-Toshiba-Tecra-A6-A7-A8-A9-A10-Laptop-/381356162365?hash=item58ca993d3d:g:Yk0AAOSwMmBVxX22>

It terminates in the right plug for the KX3 and is rated at 15 volts at max 5 amps, and only sells 
for $ 7.79 including free shipping from Hong Kong.
Anyway, it is cheap as chips so I bought one, and it arrived today. I hooked up to a volt meter
and see it is 15.4 volts. I know it is better for TX IMD to have higher voltage supplied to the 
KX3 rather than a voltage too low, but I am concerned that 15.4 volts may be too much
for the KX3. I see in the KX3 manual specs, that recommended supply voltage is 8 - 15 volts.
I would hate to hurt my KX3 with over voltage……anyone know if there would be any short
or long term problems with running 15.4 volts to the KX3 ? It is just slightly above the 
maximum recommended supply voltage

73
John, ZS5J.
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