On Wed, Aug 23, 2023 at 09:18 PM, Rick Williams - VE7TK wrote:
?The LED backlight pot is at about 50%
Turn that backlight pot completely counterclockwise to start. Ideal contrast might be a hair off of full left, but anything beyond that is blank screen territory. 50% is definitely a blank screen. As Paul mentioned, you've got to give it more juice. 25mA is way too low.? I started mine with the 250mA and 7V that Hans recommended. When I saw things were working, I went up to 11V. And soon after that, I just put it on my LiFePO4, no problems for me operating at 13.3V and even more than that, through a properly matched balance line fed antenna.
