I just love these dim witted touch screens. Apparently I bumped the send icon before it's time. I was going to mention that I have had the pleasure of being in a QSO when the electric utility failed. My all-battery station did not miss a beat:)
Of course, I do not charge the batteries that are in use. Conducted noise from the power lines ya know. 73, Bill KU8H > On Feb 18, 2025, at 8:00 AM, Bill Cromwell <[email protected]> wrote: > > > Hi, > > This must be the place for me to attach this thread. I started using > batteries to power my receivers with vacuum tubes in them. OYYY! That > eliminated conducted power line noise completely. It also eliminated annoying > frequency changes when the furnace blower or AC kicked on or off. > > More recently the computer hardware has been the sore spot. Once again, > batteries to the rescue. I have a very quiet mini PC. Just lucky I suppose. > It runs on 12 volts DC but so far I am using with an analog AC energized > power supply. I also have a small HDMI monitor that I power from a 12 volt > battery. The wall wart that came with it was horrendous! That thing now > resides in the landfill. the batteries I use now at full charge when fully > charged provide approximately 14 volts and quickly come down into the 13ish > volt range. It is possible to find quiet power banks for the "5 Volt" bits > but four NiCad cells in series give us 5ish volts and at full charge do not > exceed the manufacturer's published specs for maximum power supply voltage. > >>> On Feb 18, 2025, at 4:44 AM, Jim Brown <[email protected]> wrote: >>> >> On 2/17/2025 10:24 PM, Steve Harrison wrote: >>> Only those that use a switcher for the regulator. >> >> Exactly, which I assumed Joe and others were smart enough to pick up from my >> reference. :) Thanks for filling that in. >> >>> An oscilloscope is often a big >>> help to find and suppress a noisy regulator chip. >> >> As are battery-operated receivers. >> >> 73, Jim K9YC >> >> >> _________________ >> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
