[Elecraft] K3 13.8 VDC power

[Don Wilhelm]

Dick,

Yes, hydrogen outgassing is a potential problem, and the area containing 
a normal lead-acid battery should not only be protected from sparks and 
ignition sources, but should also be vented to the outside.

I would suggest that you look at a larger gel cell or an AGM battery.
If you use a normal lead acid deep cycle battery, you could enclose it 
in a tight battery box (often used in RVs) which has a vent hose that 
you could route outside.

73,
Don W3FPR

On 12/22/2014 2:51 PM, Richard Fjeld wrote:
> Wow, thanks to all for the greatly informative answers.  I gleaned 
> many good ideas from them.
>
> This is my concern; I am interested in protecting my K3 from damage by 
> not being shut down properly should a power interruption occur while 
> the K3 is operating. For this design, I'm thinking about a worst case 
> scenario; in transmit mode at 100 watts/20 amps, plus accessories on.
>
> I am concerned about Hydrogen gas while charging a lead-acid battery 
> here in the furnace room.  Since I don't need to operate by battery 
> power,  I'd like to know your thoughts about if a Gel-Cel battery of a 
> 9 amp variety would handle the 20 amp load until I could go to receive 
> mode and properly shut down?
> I haven't had any experience drawing that much amperage from a gel-cel 
> momentarily.  I don't know if the load voltage would be adequate to 
> keep the K3 alive.  I'd need to test it using an older style radio.  
> I'm hoping someone has had experience related to this.
>
> Thanks in advance for comments,
>
> Dick, n0ce
>
>
> On 12/22/2014 1:31 AM, Richard Fjeld wrote:
>> Is anyone floating a battery across their power distribution?
>>
>> Dick, n0ce
>>
>>
>
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