[ARC5] 24vdc power

[Bob kb8tq]

Hi

If this is a basic “no regulation” supply ( = transformer driving diodes into a load + 
(maybe) a cap …) the addition of a diode to isolate this or that does nothing useful. 

Bob

> On Sep 5, 2022, at 6:20 PM, Brian Clarke <brianclarke01 at optusnet.com.au> wrote:
> 
> The isolation diode removes the possibility of the power supply sensing the delivered voltage, and throws away power – 0.7 V x your current drain. 
> I recommend using a relay whose coil is energised when the power supply is turned on. Energise the coil from the supply’s mains switch, not the 24 V output. Gets around the problem when the mains fails, too.
>  
> 73 de Brian, VK2GCE 
>  
> From: arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net> [mailto:arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net>] On Behalf Of Glenn Little WB4UIV
> Sent: Tuesday, 6 September 2022 7:09 AM
> To: arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net>
> Subject: Re: [ARC5] 24vdc power
>  
> It is so simple, just a transformer, rectifier and filter.
> Add an isolation diode between supply and battery.
> 
> 73
> Glenn
> WB4UIV
> 
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