Only a box?
On Vince's question my basis is
Don't keep ANY SMPS transformers (possible exception would be one made with a marked, known, core and has not been glued or potted.)
Don't keep any unmarked "consumer" grade transformers.
Keep any marked commercial / industrial transformers especially toroids and those from know manufacturers.
For CRT flyback I'd keep a couple if they have separate HV windings. An external rectifier is bonus too.
I MUCH prefer this view, so since it goes my way, I will arbitrarily and without ANY bias... decide that I will do that !
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
Of course not getting rid of any torodals... these things have a special place in my heart. I have a brand new one my dad bought me 30 years so I could build my first own made adjustable linear supply... also bought me teh case, a couple 2,000 counts LCD displays, 4 ICL7106 A/D display driver chips... I guess 30 years later I now feel the need to finally build it !
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)
Finding toroïdal transformers in salvaged stuff is uncommon though... the only one I got, was a huge "home cinema" amp... the worst Chinese crap I have ever seen. The build quality was lower than the cheapest crap I have seen in 30 years. I was stunned how cheap they managed / dared to make this thing ! It's a case where the sum of the parts is worth a lot LESS than the individual parts !
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
So I could salvage lots of cool components from the thing. A few beefy power resistor, and a huge .. toroïdal transformer. Not in the picture as I can't find it... as I said I probably threw it back then in one of my boxes full of scrap boards, it's buried in there and some day I will excavate it....
The two (identical) flyback I might be able to find specs or internal construction, since of course I know where they came from. My two Samsung Syncmaster 700p CRT computer monitors. The service manual is available and has all the schematics, so that might help.
Firefox does not like Toroïdal transformers (has no taste obviously), it's not a valid word in his view...
![ThumbsDown :--](https://www.eevblog.com/forum/Smileys/default/icon_thumbsdown.gif.pagespeed.ce.D027Y9gZ7m.gif)