[Elecraft] laptop power supply to power KX3

[David Moorman]

The specs say the KX3 current draw is typically one to two amps when transmitting, so your 2.89 amp PS should do fine.

Dave,  K9SW



On Sep 18, 2012, at 3:53 PM, Bill Tubbs <cgpiper at yahoo.com> wrote:

> After sending my note about using the little MFJ power supply at 2.89 amps, I realized that it works fine on my FT-817D at 5 watts but would obviously be taxed at the full 12 watts of the KX3. So fuggetabowdit. 
> 
> Now I'M looking for a sufficient supply for the KX3 ;-)
> 
> Bill
> WK6A
> 
> Sent from my iPhone
> 
> On Sep 18, 2012, at 4:44 AM, Johnny <vr2xmc at yahoo.com.hk> wrote:
> 
>> Yes , correct , laptop supplies are often RF noisy.
>> 
>> Sent from my  iPhone 4
>> 
>> "Fred Townsend" <ftownsend at sbcglobal.net> 於 2012年9月18日 下午2:04 寫道：
>> 
>>> Jeff, caution.  Laptop power external supplies are designed to be followed
>>> by precision internal regulators that handle the logic voltages and charging
>>> the battery. The external supplies are not well regulated and can be quite
>>> noisy.  They may not be the best supplies for ham rigs.
>>> 73
>>> Fred, AE6QL
>>> 
>>> -----Original Message-----
>>> From: elecraft-bounces at mailman.qth.net
>>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jeff Herr
>>> Sent: Monday, September 17, 2012 6:40 PM
>>> To: 'Elecraft Reflector'
>>> Subject: [Elecraft] laptop power supply to power KX3
>>> 
>>> While at work I went through our stock of power supplies for the various
>>> makes of laptops we use.
>>> I found that Toshiba supplies are specified 15v and ranged in current
>>> capability from 2.5 amps and up.
>>> 
>>> Dell, Lenovo, HP, Acer, Asus all use 19v supplies.
>>> 
>>> Those Toshiba supplies are very small.
>>> 
>>> WW6L
>>> 
>>> 
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> 
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html