I use 12 volts but a higher voltage can be delivered to just the PA feed to boost the rf output. Get From: [email protected] <[email protected]> on behalf of Christopher Miller <djmalak2k6@...> Sent: Friday, April 3, 2020 8:26:22 AM To: [email protected] <[email protected]> Subject: [BITX20] Nominal power supply voltage ? Hello, I am currently feeding 12 volts in to my v3 uBitx. I was wondering if I should be using 13.8 volts. Will that blow up the 5 volt regulator? Thanks, Chris KF4FTR