Quote:
Originally Posted by spiderplant
It wasn't that simple. We had a dual standard TV*, but it only had a VHF tuner, and they put the 625 line channels on UHF. Dad wasn't happy at missing all the wildlife programmes on BBC2.
(*) I used to enjoy pushing the "625" button and watching the lines getting smaller. Happy days!
|
I asked someone about this and he said that, if your parents had of been on cable, you might have been able to get BBC2!
Some cable 60s/70s systems ran all three channels on VHF, because cable signal loss is a lot lower at VHF than UHF. So BBC 2 UHF was downconverted to a 625 line VHF signal on these systems, (and BBC1/ITV 405 transposed to other VHF frequencies to avoid direct cable pick up from the tx being a problem).
Later when BBC 1 and ITV launched on 625 UHF they are similarly down-converted to VHF.
Also, my own research shows that some dual standard TV's were sold with a VHF tuner only with the idea being that a seperate UHF tuner could be purchased and added later on. You learn something new every day!
https://www.transdiffusion.org/2017/...to-625-line-tv (section 17).