[Andrew2]

Absolutely wonderful reading. Obviously a huge amount of work has gone into the research and presentation. I was particularly interested in the transistor UHF tuner section, as I had quite a collection of 'liberated' ones with which I poked about on UHF by altering the tuning range to tune above or below their normal coverage. A 35 MHz IF amp was followed by a mixer/osc with a second IF at a few MHz (can't remember now!). Using this connected to the rooftop TV aerial I discovered the local radio station's studio to transmitter link on something like 900 MHz and of course lots of interesting stuff around 450 MHz. Keeping it on-tune was interesting. Happy days before we had scanners! Around 1974 I think.