I did this a few years ago. After mounting the parts for the regulator on
the outside of the walwart, I covered it with a large legos block from my
kids toy box. The kids never missed it.
Steve, W2MY
-Original Message-
On Behalf Of Jim W7RY
Terry has the right idea! A 3 terminal
Burke
I often use a walwart when traveling with my KX-1. It has never harmed the
KX-1, caused a black hole to open or caused other grave consequences such as
bad tone reports. I generally use a 1 amp wart. The 6 watts you get from a
1/2 amp wart might be a bit skimpy on transmit.
Bob
Could I use a 12V 500ma to power my KX1 when at home?
Burke Jones
N0HYD
Sent from my iPhone
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, December 23, 2008 2:43 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Walwart power?
Could I use a 12V 500ma to power my KX1 when at home?
Burke Jones
N0HYD
Sent from my iPhone
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You must
Burke,
There are exceptions to everything, but in general, wall warts are not a
good power supply choice.
For most of the 12 volt wall warts, the no-load voltage soars to as much
as 17 volts and when loaded to full rated current, the voltage will sag
below 12 volts.
Now, if you can find one
Thanks guys! You have confirmed my suspicions.
Burke
Sent from my iPhone
On Dec 23, 2008, at 5:23 PM, Don Wilhelm w3...@embarqmail.com wrote:
Burke,
There are exceptions to everything, but in general, wall warts are
not a good power supply choice.
For most of the 12 volt wall warts,
On Tue, Dec 23, 2008 at 5:43 PM, Burke Jones tacg...@gmail.com wrote:
Could I use a 12V 500ma to power my KX1 when at home?
The KX1 manual suggests it uses 300-700 mA on transmit, depending on
voltage. Assuming you don't need to rectify (or use a ultra-low
dropout voltage regulator) it should
Kx1 to KX1 sometime.
Dan N0TK
Highlands Ranch, CO
-Original Message-
From: Burke Jones tacg...@gmail.com
To: Elecraft@mailman.qth.net Elecraft@mailman.qth.net
Sent: Tue, 23 Dec 2008 3:43 pm
Subject: [Elecraft] Walwart power?
Could I use a 12V 500ma to power my KX1 when at home
I have a Jameco ReliaPro plug in transformer. It looks pretty much the same
as the standard wall wart, but is actually a transformer instead of switching
based supply. There doesn't seem to be any noise and I think the regulation
is pretty good. The product number is 170245. It's rated at
I use one of these with my K2 and it should work fine with a K1 or
KX1 as well:
http://www.mfjenterprises.com/Product.php?productid=MFJ-4103
Small, lightweight, quiet and works over a wide range of input voltages.
Bob N7XY
On Dec 23, 2008, at 2:43 PM, Burke Jones wrote:
Could I use a 12V
Hey, everyone:
While using a wall-wart directly is probably not a good idea, you might
want to see what Terry (WA0ITP) did to solve the problem. Essentially,
he epoxied an LM7812 and heatsink to the back of a wall-wart, added a
couple of capacitors, and checked the output for any ripple.
, so
does the filtering effect of the device.
73
Jim W7RY
- Original Message -
From: John R. Lonigro john...@sbcglobal.net
To: Elecraft@mailman.qth.net
Sent: Tuesday, December 23, 2008 5:13 PM
Subject: Re: [Elecraft] Walwart power?
Hey, everyone:
While using a wall-wart directly
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