Re: Looking for a good power supply that will handle a load
Teton Amateur Radio Repeater Association (TARRA)
If you use some type over regulating system to drop it down to
5V, keep your 5V lead length as short as you can. I think mine are
about three inches long.
----- Original Message -----
From: Ray Wells
Sent: Monday, March 23, 2020 03:06:15 PM
Subject: Re: [RaspberryPi-4-HamRadio] Looking for a good power supply that will handle a load
> +1 on the power supply socket and its related problems. I still haven't
> overlooked employing a dangling lead with a coaxial line socket for each
> of my RPi's. Then I ca be absolutely certain the power lead has adequate
> conductor size.
> Ray vk2tv
> On 24/3/20 1:22 am, Max via Groups.Io wrote:
> > I agree with the problem of finding heavy duty USB cables. I wish the
> > pi had an on-board regulator that would accept 8 to 18 volts or so
> > along with a coaxial power connection. That would have eliminated most
> > if not all of the power problems that users have had over the years.
> > I keep looking for a USB power cable much like what you would have if
> > you were to cut off the cable of a Pi4 power supply. Just a USB-C
> > connector on a 20awg two-wire cable. Then I could use a single power
> > supply and distribute the power to multiple Pi's.
> > Max KG4PID
> > On Monday, March 23, 2020, 07:31:34 AM CDT, BruceN
> > wrote:
> > Has no one thought of using a repurposed PC power supply? I took an
> > old PC supply, removed most of the inside wires and replaced them with
> > 10/12 gauge conductors. Put banana jacks or Graypole connectors on
> > the case for 12 VDC, 5 VDC and 3 VDC. Made up a small distribution
> > board using USB A receptacles for 5 VDC and then use good quality USB
> > A to micro A cables for 5 V. Got plenty of power (many amps) and
> > service several Pi's or other boards. Cost: about $40 if you bought
> > new. 0 if you scarfed the supply from an old PC.
> > I haven't had any issues with noise because I try to use only heavy
> > duty power supplies. Believe it or no,, you can tell by weight. If
> > it's light, it will be noisy. BTW, I use these supplies on a couple of
> > radios, too. So far, so good.
> > If you do a web search, you'll find several sources with information
> > on how to re-purpose the supplies. There is even one which shows how
> > to change the 12 VDC to 13.6 VDC more suitable for most radio equipment.
> > My only gripe and frustration is how to find heavy duty USB cables.
> > And price doesn't mean a thing. I've paid a pretty penny for "heavy
> > duty" cables only to find that they are crap for DC. I'm considering
> > adding a good coaxial connect to the Pi for DC. A little less handy
> > but it will eliminate low voltage issues.
> > BruceN / K4TQL