As I wrote once - in late 80ties I worked in a lab which messed with 1/f noise measurements. Within my diploma work I created a measurement chamber for the LNA and the samples with all the necessary batteries. The result - see below. Inside that box we had an additional copper foil inner box. There is a single 5mm dia hole for the coax.
What is funny a friend of mine, who works there at university, showed to me my decades old box yesterday - they found it while they did a cleanup of the labs, with an intention to carry it to scrapyard..
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
..
Thus I've shot a couple of pictures - for a record - the box weights some 25-30kg (an estimate), a little bit rusty here and there, but still in an excellent condition..
![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/xcheesy.gif.pagespeed.ic.KPzuH4J-TG.png)