Heinz, I think this was discussed here suggesting a LM1085IT-12 IC. Not the most efficient compared to buck-converters I guess but probably quiet enough.
Thanks for your comments, Chris and nice to hear from you as I’ve been following your QMX Carrot build with interest.
You are right - the 13V 5.5Ah battery is way more than the QMX needs, but it is what I had available. I am using an LDO linear regulator to provide a steady 12V to the radio as I’m very nervous about how I power it. It’s an LM1085IT-12 in the module covered with black heatshrink, visible in the selfie photo next to the water bottle. I plan to make up a smaller battery with 18650…
Not sure if e.g. this would be fine for HF ?
Meanwell N78
And I recall that there was someone using a PD (Powerdelivery) PCB to bring 12 VDC to a rig from a powerbank. Maybe also a way?
73 Joe
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