[Elecraft] KX3 power supply

[Jim Brown]

There are other good solutions. Use the panels and charge controller to 
charge an outboard battery.  Now you DO have enough for TX.

Genasun is the best, no RF noise, very efficient.  They make different 
products that are designed for each type of battery chemistry, and for 
different power ratings. I use the GV-10 in my station.

http://genasun.com/products-store/mppt-solar-charge-controllers/

This SunForce is less efficient, no RF noise, but very inexpensive.  $17 
at amazon. Designed for lead-acid.  I used this unit in my station until 
I found the GV-10.

http://www.sunforceproducts.com/product_details.php?PRODUCT_ID=56

73, Jim K9YC

On Tue,1/19/2016 12:23 PM, Thorpe, Jeffrey wrote:
> I did that for a folding solar panel I purchased that put out 18V. A couple zeners dropped it to 15.3V. The panel doesn't have the juice for transmission, but fine for receive (or charging the batteries).
>
> Jeff - kg7hdz
>
>> On Jan 18, 2016, at 16:21, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>>
>> John,
>>
>> I would suggest that you put a diode in series with that supply - rated at 5 amps.  That will reduce the voltage by the amount of the diode drop.
>> Running the KX3 (or any other device) above the specified maximum voltage is done at your own peril - it may work, but it taxes the regulators and other devices.
>>
>> 73,
>> Don W3FPR
>>
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