Portable Power Supply

[Shel Radin KF0UR]

Greetings All,

Here I am portable at my mother-in-law's place in NY (home QTH is CO).  I was fortunate enough to bring my KX1 with me to make *good* use of my time while visiting.  With the internal batteries (1-2 watts out) and a 36 foot wire tossed out of the window of her 4th floor apartment, I made a dozen QSOs on 20M yesterday including OK, I, PJ2, PJ4, HG, and a bunch of stateside.    What a blast!

For the next visit, I'll have my KX3, and things can only get better.  Condx are poor today, but I bet I could make a PSK31 QSO if I had the means.

Which brings me to my quest for a portable power supply.  Having used my KX1 only hiking and never around AC, I've never thought about a small supply.  But in this situation, it's very appropriate.  I noticed there are a number of supplies on the market when I searched for 12V 2A regulated supplies.  There are some that are wall wart style, which would be perfect for travelling.

So, my question is...
- does anyone have any experience with these and have a recommendation?
- are these relatively cheap regulated supplies really regulated enough?
- do we think 2 amps is sufficient for the KX3 in the 10 watt mode?

Tnx for the advice.

73,   Shel  KF0UR

[Dick Dievendorff]

I've seen posts from people who used 12V laptop computer power supplies with
some success. See
http://www.eham.net/ehamforum/smf/index.php/topic,78185.0.html 

The Samsung AD-4212L has a ferrite on the 12V cord, so maybe it's quiet
enough. Prices vary widely depending on source. I've not used one.
 
I have a Gamma Research HPS-1a, http://gammaresearch.net/hps-1a.html that is
just a bit larger than the KX1.  It's nice having one compact supply that
can support the KX1, K2, and (with some limitations), the K3.

73 de Dick, K6KR


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Shel Radin KF0UR
Sent: Sunday, January 22, 2012 7:34 AM
To: [hidden email]
Subject: [Elecraft] Portable Power Supply

Greetings All,

Here I am portable at my mother-in-law's place in NY (home QTH is CO).  I
was fortunate enough to bring my KX1 with me to make *good* use of my time
while visiting.  With the internal batteries (1-2 watts out) and a 36 foot
wire tossed out of the window of her 4th floor apartment, I made a dozen
QSOs on 20M yesterday including OK, I, PJ2, PJ4, HG, and a bunch of
stateside.    What a blast!

For the next visit, I'll have my KX3, and things can only get better.  Condx
are poor today, but I bet I could make a PSK31 QSO if I had the means.

Which brings me to my quest for a portable power supply.  Having used my KX1
only hiking and never around AC, I've never thought about a small supply.
But in this situation, it's very appropriate.  I noticed there are a number
of supplies on the market when I searched for 12V 2A regulated supplies.
There are some that are wall wart style, which would be perfect for
travelling.

So, my question is...
- does anyone have any experience with these and have a recommendation?
- are these relatively cheap regulated supplies really regulated enough?
- do we think 2 amps is sufficient for the KX3 in the 10 watt mode?

Tnx for the advice.

73,   Shel  KF0UR



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[Geoffrey Mackenzie-Kennedy-3]

I used a Toshiba laptop computer power supply to power my K2 (receive only)
for almost 3 years nonstop 24/7 during a propagation study, although I did
add a voltage regulator placed betweeen the supply's output and the K2. This
particular supply is rated to deliver up to 6 amps at 15V, but its output
voltage is not well regulated and will increase as current draw decreases.
The supply generates noise at HF which could be a problem when operating
portable.

Footnote. Should anyone contemplate using a Laptop's supply in cotinuous
unattended duty, I suggest that the supply should be enclosed in a fireproof
box as a safety measure.

73,
Geoff
LX2AO



On January 22, 2012 at 18:38 +0100, Dick Dievendorff wrote:


> I've seen posts from people who used 12V laptop computer power supplies
> with
> some success. See

<snip>

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