Re: HT20 Alive!
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A 9V supply will work, although a consumer-grade 9V battery may not last long- its internal resistance will increase pretty quickly as the cells discharge. A limiting factor on the minimum supply voltage may be the dropout voltage on the 5V regulator- a supply voltage in the 6-7 volt range. Even then, it may be a graceful degradation.
I've never tried testing it. Let us know how you make out.
BTW- I've used a three-cell (3S) Li-Ion battery quite a bit for portable applications- they're rated at 11.1V nominal and work very well with the Hilltopper. Mine's a 1.3 Amp-hour battery weighing only 3 ounces.
73- Dave, K1SWL
On Mon, Aug 26, 2019 at 11:26 PM Charles W. Powell via Groups.Io <firstname.lastname@example.org> wrote: