[Elecraft] laptop power supply to power KX3

[Johnny]

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
> 
> 
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