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Low voltage solution +WARNING+
开云体育WARNING+++++++ I purchased three of these (see URL below) a few weeks ago. Perhaps I received a faulty batch but all three of them performed the same. On a 'soak test' with an input of 14.2v and a 1R load on the 5v output. The 100uF 50v wkg capacitor next to the input terminals reached such a high temperature that I received a blister to my finger when I picked up the board. This was only after the unit had been supplying power for a few minutes. I doubt the capacitor will last for long before failing, perhaps causing the demise of the powered equipment. I dont have a means of measuring the temperature it reached but it was hotter than my Weller soldering iron tip. I assume that this is caused by the current flowing through the cap, because 14.2v across a 50v cap should'nt get vaguely warm. The other 100uF 50v cap on the board was relatively cool, having only been heated by the dissipation of the silicone devices on the board. Your experience may be different, but I would recommend a soak test before committing this board to use. hth, Mike G8NXD On 09/11/2024 13:15, Kevin Gray via
groups.io wrote:
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----- Original Message -----
From: "Niece KA1ULN via groups.io" To: [email protected] Sent: Wednesday, March 19, 2025 06:51:10 PM Subject: Re: [RaspberryPi-4-HamRadio] Low voltage solution +WARNING+ > does? anyone? have? the? ?url? for the? ?wallwart? power supply? for? the? ?pi5 (26w)? > > i have? seen? it but now? cannot? find it.. i am using? ?HF? aprs? and? need? more? power? for the? maps. > > tnx? NIece > > > > > > --
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----- Original Message -----
From: "N5XMT via groups.io" To: [email protected] Sent: Wednesday, March 19, 2025 08:08:11 PM Subject: Re: [RaspberryPi-4-HamRadio] Low voltage solution +WARNING+ > It's actually 27W > > > > > > > > > > > --
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