Quote:
Originally Posted by Nuvistor
Yes I had read about the change in frequencies and the “lost” channel 1 to accommodate the 40 odd MHz IF whereas Europe went for 30 odd MHz and kept the Ch 1 freq.
UK UHF valve (tube) tuners were not very sensitive circa 1964/65 when UHF TV started in the UK, quickly changed to transistor which were much better.
USA started with UHF in the early to middle 50’s, how good was the UHF performance of those early tuners?
|
Early US UHF tuners were very very insensitive - typically employing no RF amplifier at all - simply an oscillator and mixer feeding into the VHF tuner - this was no great problem, however, as UHF was used in the US, and in most other countries to provide additional, local services, with VHF (with its vastly superior propagation characteristics) continuing to be used for nationwide services. It was only in France and GB, where VHF channels were already occupied by legacy systems ie 819 and 405 line respectively, that UHF only had to be employed for nationwide coverage