Check out a scrap switch mode Transformer

RE: Check out a scrap switch mode Transformer

Jan Cumps — Mon, 29 Jan 2024 13:34:20 GMT

I just did a measurement of the inter-winding-capacity. Inspired by [mention:e1abed0c296248a7a1e316f01dd8d77e:23b05a61c3e5445190d9bfa00453bce4]

I shorted the primary (1-3) and the first secondary (17-16). Then put an LCR meter across the two windings.

I measured across the 5 frequency ranges of the LCR meter (100 /120 Hz, 1 / 10 /100 kHz). The capacity measured is between 15 and 17 pF.

RE: Check out a scrap switch mode Transformer

Jan Cumps — Fri, 02 Oct 2020 20:20:03 GMT

Here are the measured inductances:

[View:/resized-image/__size/510x368/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-8173597a-ca44-49af-a3f8-8d99a1ca83c0/contentimage_5F00_192380.png:510:368]

RE: Check out a scrap switch mode Transformer

jw0752 — Sat, 26 Sep 2020 19:55:49 GMT

It is fun to see what turns up when you start to investigate a component. Good job on following this one right to the foundation.

John

RE: Check out a scrap switch mode Transformer

shabaz — Sat, 26 Sep 2020 18:09:08 GMT

Hi Jan,

I kept old transformers for enamelled wire too : ) VCRs always seemed to be a technology 'on the edge' of either working, or not working : ) Always impressive that the spinning head thing could possibly function for video!!

RE: Check out a scrap switch mode Transformer

DAB — Sat, 26 Sep 2020 17:36:53 GMT

Good post Jan.

DAB