[arm-allstar] 13 V to 5V PI pwr supply

[David McGough]

Hi Jim,

Thanks for sharing this info! Talk about bizarre problems!

I've never personally seen any kind of problem like this related to this
type of setup, I've got numerous similar setups. I'm using Jetstream,
MFJ and Mean-Well switchers everywhere...And, many little Chinese 5V 
regulators.

Was this setup at home or at a site with broadcast transmitters??? --What 
I'm wondering is: was there significant high-power RF floating around?

73, David KB4FXC


On Mon, 12 Oct 2015, James R. Pilgram wrote:

> Tonight I was setting up a Raspberry Pi2 with a simplex CDM750 and 
> converted usb fob getting all kinds of screwy problems. The Fob was 
> going in and out and failing.
> 
> In my case, I was using a Astron SS-25 switching power supply to power 
> the radio and one of the 12 to 5 volt switching modules to power the Pi. 
> The radio was going crazy, the fob was going crazy, the Pi was going 
> crazy and the supply crow-barred. I grabbed another supply, A Samlex 
> SEC1223 switching supply and got the same issues. We were having a 
> similar issue with another node on Maui only he was using a DMK-URI and 
> a switching supply Powering a 12 to 5 volt module and a simplex radio 
> from the same supply.
> 
> Turns out the guy on Maui solved the problem with a different power 
> supply for the Pi not hooked to the switching supply running his radio. 
> I'll be trying again tomorrow with a linear supply. I never had a 
> problem with a linear supply or a nice big battery bank.
> 
> Jim NH6HI
> 
> On 10/10/15 03:47, REDBUTTON_CTRL wrote:
> > Well, how are you running them on a 12v battery or 13.8 power supply 
> > with battery back up?
> > Are they at home or at repeater site?
> > Jon VA3RQ
> >
> > On 10/9/2015 1:13 AM, Eric Harrison wrote:
> >> Well not much more I can say. They are made in China and are cheap 
> >> and like all electronics are subject to failure's!
> >>
> >> Eric
> >>
> >> N7JYS
> >>
> >> Sent from Yahoo Mail on Android 
> >> <https://overview.mail.yahoo.com/mobile/?.src=Android>
> >>
> >> ------------------------------------------------------------------------
> >> *From*:"David McGough" <kb4fxc at inttek.net>
> >> *Date*:Thu, Oct 8, 2015 at 11:35 PM
> >> *Subject*:Re: [arm-allstar] 13 V to 5V PI pwr supply
> >>
> >>
> >> Hi Eric,
> >>
> >> Interesting that you're having failures. I'd like to hear more about the
> >> failed systems?
> >>
> >> I've been running -many- (more than a dozen at this point) supplies of
> >> this style, on many projects, with no failures.
> >>
> >> 73, David KB4FXC
> >>
> >>
> >> On Thu, 8 Oct 2015, Eric Harrison wrote:
> >>
> >> > Just FYI I have been using this same DC to DC converter on several 
> >> up my pi's and already had 2 of them fail after a few months of use.
> >>
> >>
> >> Eric
> >>
> >> N7JYS
> >>
> >> Sent from Yahoo Mail on Android
> >>
> >> From:"jim.pilgram at gmail.com <javascript:return>" 
> >> <jim.pilgram at gmail.com <javascript:return>>
> >> Date:Thu, Oct 8, 2015 at 7:25 PM
> >> Subject:Re: [arm-allstar] 13 V to 5V PI pwr supply
> >>
> >> I have been using these on our system since Doug put the RP2 build 
> >> out and have not had any problems with the over 1 dozen units out 
> >> there. Love them and the price.
> >>
> >>
> >> Sent from my BlackBerry 10 smartphone on the Verizon Wireless 4G LTE network.
> >>
> >> From: Jacques St-Pierre
> >>
> >> Sent: Thursday, October 8, 2015 14:12
> >>
> >> To: arm-allstar at hamvoip.org <javascript:return>
> >>
> >> Reply To: ARM Allstar
> >>
> >> Subject: [arm-allstar] 13 V to 5V PI pwr supply
> >>
> >>
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> >>
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> >>
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> >>
> >>
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> >>
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> >>
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> >>
> >>
> >>
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> >>
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> >>
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> >
> >
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> >
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> >
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> 
>