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From: "Edward Rawde" <invalid@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Re: more X-rays  Silvertel PoE Supply
Date: Wed, 2 Oct 2024 17:00:52 -0400
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"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
> On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
> <invalid@invalid.invalid> wrote:
>
>>"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
>>> On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
>>> wrote:
>>>
>>>>On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
>>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
>>>>
>>>>>
>>>>>https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
>>>>
>>>>Cannot make out much from those x-rays, pictures are better...
>>>>you can probably see the traces just like that?
>>>
>>> The x-rays are fun, but are admittedly more useful for an opaque
>>> potted module or an IC or discrete semi. I can prety well trace the
>>> Silvertel without them.
>>>
>>> I have a gigantic scary Carribean guy who does the xrays and I wanted
>>> an excuse for taking him to lunch, which turned into an interesting
>>> hike around The Bernal Cut. He trashed the xray system software, and
>>> had to rebuild it, and now it can do movies, which is great.
>>>
>>> I'd like to have some products that can be powered by PoE or a wart,
>>> and may want to put two 24-volt PoE supplies in series to get 48, so I
>>> need to understand how they work. The xrays just help a bit.
>>
>>If Ag9900 just works then why would you care how?
>
> Can I overpower it with a wart? Does that need another diode?

Maybe. See other discussion in this thread.

>
> Can I run two 24v Silvertels in series to get 48?

I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.

>
> And I do care how things are designed.

Depends on whether you can fully reverse engineer an Ag9900, in which case you might either be satisfied or horrified.

>