[Elecraft] Wallwart

[Mike Morrow]

Dave wrote:

> The p.s. for this laptop is ideal. Regulated, 12.5 volts, 2.5 amps.
> Double duty. There is only so much room in carry-on luggage.

Does it have a coaxial DC power plug of the proper size and wiring polarity
that allows it to serve either the computer or the K1 without a home-made
adapter?

Another thing to test whenever you're trying a small DC power supply of
unknown internal configuration is the RF noise that it generates.  I'm
not speaking only of the garbage that comes from most switcher supplies
at various frequencies.  The power supply for my Samsung cell phone
generates a very **broadband** noise across several HF ham bands when the
supply is plugged in to the phone for charging.  With no load, there is
no noise.  It pays to test several such conditions. 
  
For which bands is your K1 built?  Right now band conditions are proving
something that I have always claimed as the best of the features of the
non-DDS K1 which the KX1 and other simple DDS-based QRP rigs can not offer
...coverage of 15 meters!  That's a fantastic QRP band when it is open,
which it has been frequently during the past few weeks.  It should only get
better over the next few years.

Congratulations on your K1.

73,
Mike / KK5F
K1 Serial 175 (November 2000)