[Elecraft] K3 - How much supply voltage is too much?

[n5ge at n5ge.com]

If I had paid 1,500USD or 1,700USD for A K3 10W rig I don't think I'd risk
putting anything but a real power supply on it.  Wall warts are not (in my
opinion) real power supplies.

Look at this:

http://www.mfjenterprises.com/Product.php?productid=MFJ-4125

And it's reviews:

http://www.mfjenterprises.com/Reviews.php?productid=MFJ-4125

http://www.eham.net/reviews/detail/1895

And if you get a KPA3 later you won't have to get another one...

73,
Tom
Amateur Radio Operator N5GE




On Tue, 10 May 2011 12:13:33 -0700, Jim Brown <jim at audiosystemsgroup.com> wrote:

>On 5/10/2011 10:54 AM, Ross Primrose N4RP wrote:
>> I have a surplus laptop switching supply that's 15V @ 5A. Is that too
>> high a voltage to run my 10W K3 on routinely?
>
>If it were my radio, I would add one or two silicon diodes in series 
>with the positive lead to reduce the voltage to about 14 volts. For a 
>10W K3, I'd guess that 5A diodes would be just fine.
>
>If it's a laptop supply, I would also be concerned about RF noise that 
>it might produce.
>
>73, Jim K9YC
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