Re: HF Preselector Power
On 2/12/2020 12:36 PM, David Cutter via Groups.Io wrote:
I have one of this exact supply, bought on Amazon. I use it for
"smoke-testing" newly-built gadgets, GPS receivers, soundcard
interfaces, etc. Since the current is far more limited than the
nearly unlimited amps of my main ham shack supply (20A 12 VDC
supply in parallel with Exide 120 AH 12 VDC trolling motor
battery), the potential for smoke and fire from mis-wired
newly-built devices is obviously far less!
The flexibility of choosing a range of voltages (3 VDC or 5 VDC for GPS devices, 8 VDC for powering many hand helds, 12 VDC for TNCs & sound card interfaces, etc) is great. In addition to the various size coaxial tips, it also comes with a "tip" that has simple + and - screw binding posts on it. I connect this one to a short length of red/black zip cord to a pair of Anderson PowerPoles. I can then use it as a low-current battery maintainer.
So far I have not noticed any noise problems on HF with this supply.
Stephen H. Smith wa8lmf (at) aol.com