Alex@rtnVFRmedia Suffolk UK on Nostr: nprofile1q…q9sgw my school had an isolation transformer for the whole computer room ...

nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqqr0flvh3lwezsfav88qd6tqk6pfmtgv9gsr78dzkewp7wgwslnnqrq9sgw (nprofile…9sgw) my school had an isolation transformer for the whole computer room - we were told it was to protect computers, but it was equally likely this was done to stop Econet carrier being backfed down mains earth (that part of the school had PME / MEN mains) as it would otherwise be radiated by mains wiring and upset reception of long wave BBC Schools radio programmes that AV techs recorded on cassette for later listening in class (there wasn't as much EMC screening back then!)