[Elecraft] KX2 battery options.

[K9MA]

On 11/19/2018 08:54, Detrick Merz wrote:
> 4 cells: at full charge, pack voltage is too high for the KX3. On the flip
> side, nominal pack voltage will remain high enough for the radio to operate
> at higher power until the pack is nearly dead. I've dealt with this two
> ways:

Depending on the chemistry, Li-Ion cells can be something like 3.2 to 
4.2 V fully charged. I used 4 of the 4.2 V cells to power the KX1, with 
a low dropout linear regulator to limit the voltage to 14 V.  With a 
little better heat sink, that regulator should work with the KX2 or KX3. 
The schematic is here:


sdellington.us/hr/KX-1_regulator4.pdf


73,

Scott K9MA


-- 
Scott  K9MA

k9ma at sdellington.us