[Elecraft] K3: internal battery and cooling questions

[wayne burdick]

Hi Doug,

Doug Faunt wrote:

>
> Note that the K3 as displayed has NO provision for an internal battery.
> OTOH, there's enough empty space in a barebones model to fashion a new
> top cover with a battery holder.

It would take a pretty serious battery to power the K3, given a typical 
minimum RX-mode current drain of 0.8 to 0.9 A. With a subreceiver 
installed, there may just be room for 10 C cells, broken into two 
4-cell packs. I'm hoping to offer an enclosed [safe!] fuel cell as an 
internal option someday  ;)

>
>
> There do seem to be some obvious opportunities for us high-duty
> cycle RTTY ops to improve final cooling, IIF it should be deemed
> necessary.

The K3 has two large, quiet fans on the 100-W compartment. They are of 
a standard size (HxW), and if necessary, they could be replaced with 
much deeper units, thus avoiding the aesthetic compromise from adding 
fans on top of the box. That shouldn't be necessary.

We haven't determined final duty cycle ratings, but given the larger 
fans and larger heat sink, I'm expecting it to come in higher than the 
K2/100.

73
Wayne


---

http://www.elecraft.com