Andy:
Keep in mind a linear wall wart will offer transformation to the lower voltage
from a specific voltage input: think transformer winding ratio.
If it’s 110/115 VAC in and 12 V out, you’ve landed a transformer/based linear
power supply.
If you are offered a wide range of voltage in, say 110-240 VAC and 12 V out you
have a switching power supply.
The only exception I have seen is on travel adapters where there is a specific
input voltage selector switch, changing the taps on the primary transformer.
Hope this helps.
And do read K9YC’s writings on the subject. He’s spot-on in his observations
and recommendations.
Ed
AG6CX
Sent from my iPhone
> On Nov 26, 2018, at 8:57 AM, Aly Badawy (callsign: AL0Y) <aly@al0y.com> wrote:
>
> If you read the questions and answers of the amazon page for the item you
> sent, you will notice the seller has posted a link to the 12v version to
> someone who was asking for a 12v one. Here is the 12v version:
> https://www.amazon.com/dp/B073F51QPY?m=A2G2V645G57K3Y&ref_=v_sp_detail_page&th=1
> However, I need to say, I only copied and pasted the link from the page you
> posted below. I have no experience using any of the mentioned products and
> can't recommend any of them. Aly Badawy (AL0Y) District Emergency
> Coordinator (Passaic County, NJ) Amateur Radio Emergency Service ARRL
> Official Relay station NNJ Section, Hudson Division RRI Registered Operator
> AL0Y@AL0Y.#NNJ.NJ.USA.NOAM MeshPhone: 973-3301 | Cell: (862)276-8263
> aly@al0y.com | http://al0y.com ---- On Mon, 26 Nov 2018 11:49:26 -0500 Andy
> KU7T <ku7t@ku7t.org> wrote ---- Hi, I walked around my house with an AM radio
> and am not pleased. I would like to replace all switching power supplies with
> the non-switching kind, everywhere in my house. I found this 5V one:
> https://www.amazon.com/IBERLS-Regulated-Transformer-Controller-Nextbook/dp/B0745BZV6T/ref=sr_1_4?ie=UTF8&qid=1543249886&sr=8-4&keywords=power+supply+5v
> It states “regulated” and not “switching”. Also, I can see a transformer on
> one of the pictures. I am looking for a 12 V one. Anyone have
> recommendations? Thanks, Andy KU7T Sent from
> Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
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