About a decade before that I was working in radio-paging and we had a then fairly old, but very compact for it's time "talkback transmitter". About 1/4 the size of a pack of cigarettes, short range, closer to PMR than cellular. But it was advanced for its time. IIRC it actually dated from the 60s.

One day we saw it in a centre-spread 'expose' in one of he big national (UK) newspapers ... apparently the Russians had obtained some some and were using them as bugging devices. Oops.


Jazz relative beginner, starting at a much older age than was helpful.
Kawai MP6, Korg M50, Ui24R, Saffire Pro 40.
AVL:MXE Linux; Windows 11; Win8.1: Scarletts
BIAB2022 UltraPAK, Reaper, a bunch of stuff.