[Elecraft] [KX3] Boost Buck 13.8 V Regulator

[dombaines at yahoo.com]

16V into a KX3 would be terminal to the KX3!

I think you might need to refer to 
http://kr7w-sota.blogspot.co.uk/2013/01/qrp-ops-battery-power-fyi.html 
that has a few links. (Talking about FT817 but same issue of over voltage).

Or you could just buy a 14.4V LiPo or take one 3.7V cell out of the 4S 
pack which will drop it to 13.7V?

72

Dom
M1KTA

p.s. For those not in the know... charging a 4S LiPo battery is not a 
case of applying a voltage and leaving it like you would say a SLA you 
need a proper LiPo charger. If trying to charge from 13.8V (I assume a 
vehicle?) then look for an intelligent charger that will recharge LiPo 
'packs'.
You can try and homebrew something but I wouldn't, ebay will usually 
bring up plenty of options. Usually you would be able to pick up the 
charger/charging electronics at the same time as buying the battery, if 
the vendor does not have or cannot advise then be careful what you buy.


On 13/05/13 07:38, Glen Torr wrote:
> Hi All,
>
> I have a KX3 and am doing some SOTA activations.
>
> I have obtained a 4S LiPo battery which is somewhere north of 16 V with
> full charge.
>
> I would like to get a DC-DC regulator as a more elegany solution than
> series diodes.
>
> I have searched and searched but no solid outcomes.
>
> Anyone have any input on where to find such a regulator?
>
> Many Thanks,
>
> Glen