The K3 front panel power schematic shows three 3-terminal regulators for
8V, 5V and 3.3V. I don't see why they'd use anything other than the
front panel. The front panel MCU would run the RS-232 port.
I'd probably make a little pigtail from RCA male to 5.5x2.1 barrel
female. Then you can use a standard power adapter. As long as you're
using a wall wart, I don't think the RCA plug "hot" being exposed is
really a concern since it's only hot relative to its ring.
73,
Josh W6XU
On 2/26/2013 2:22 PM, iain macdonnell - N6ML wrote:
The K3/0 uses, for 12V input, the RCA jack that's normally the 12V
accessory output on a K3. This is not ideal, in that it leaves the
"hot" 12V line exposed on the pin of he male RCA plug when it's not
connected, but I suppose the intent was to use the existing K3
metalwork.
So can anyone confirm whether or not the K3/0 has an internal voltage regulator?
73,
~iain / N6ML
On Tue, Feb 26, 2013 at 1:55 PM, Ray Sills <[email protected]> wrote:
HI Chris:
I can't imagine that the K3/0 draws more than 1A... most likely way less.
If so, per Don's suggestion to try Marlin P. Jones.. how about this:
<http://www.mpja.com/12-Volt-Power-Supply-1A-Switching-Cui/productinfo/19011%20PS/>
???
I also assume it uses the "standard" 5.5 by 2.1 mm barrel connector. I
can't determine if the linked item is center tip positive or not.
73 de Ray
K2ULR
On Feb 26, 2013, at 1:34 PM, Chris Tate - N6WM wrote:
greetings Elecraft brain trust...
this may sound like a silly question, and I know its sacrilige in most
amateur forums, but does anyone know if there is and/or does elecraft
support a suitable 12v wall wart that can be used safely to power the K3/0
terminal? I currently use a small astron switcher with it.. With no RF
noise worries in the shack (I guess i now call it the terminal facility) I
was wondering if I could slim down the install even more for portabilities
sake.
(of course now I can also put up the old retired plasma tv in the shack to
display grey line and spot data without worry of qrn hi hi).
thanks~
Chris
N6WM
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