[Elecraft] K3/0 power

[Josh Fiden]

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 <raysills3 at verizon.net> 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
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>