@mcscx @cypnk it was also caused by the heat of the valves and from the mains trafo burning any dust inside (this equipment runs quite warm, you often see where collectors/restorers also keep pet cats that the kitties often sit on top of the cases of old radios, test equipment etc).
I suspect a lot of the chemicals in that "smell" are now classed by EU and other safety researchers as really bad for you and replaced by other (hopefullly less bad!) stuff...
@mcscx @cypnk I also remember the smell from working on electronics in high school, we often reused a lot of 1970s era surplus components and circuit boards, I think British Telecom donated a lot of them as where I lived we had an unusually advanced (for UK) electronic telephone exchange which was upgraded several times, as a lot of audio from #ColdWar #radiomonitoring and #surveillance went through the region due to the #BBC #Caversham Monitoring service being down the road!
One of the first Mastodon instances, there is no specific topic we're into, just enjoy your time!