#46
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Remember that in the UK the aim was true national coverage, not just a good signal in major cities with poor signals in many other areas. I think the aim was to cover 98%+ of households. It will take some work to find the relevant BBC reportsfrom the 1950s and 1960s, but they will be online here: https://www.bbc.co.uk/rd/search?Type=Publications |
#47
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I know ITV couldn't have used low band/band 1 in most of Britain as BBC had nicked all the channels, just in a few select areas. I'm thinking ITV could have covered most of northern England with one Low Band TX high up in the Pennines instead of two TX's on High Band. Later BBC TX's could have used High Band & viewers could have used a single High Band antenna to receive both BBC & ITV like they did in Lincolnshire. I suggested channel 5 for ITV London as I think it was unused in that area in 1955.
Read an article somewhere about the problems they had in New Zealand putting two national services in 3 Low Band & 5 High band channels, some areas had both services on Low Band & other areas were like Britain where Low & High Band was used... When I rented an apt in Miami in 1989 there were three channels on Low Band = ch's 2, 4, & 6... |
#48
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Been thinking: In UK low band TV had lots of Sporadic-E co-channel interference, did low band viewers in US have the same problem? When I rented an apt in Miami in November 1989 I can't remember seeing co-channel interference on ch's 2, 4, & 6, did see ignition interference though. I know both Miami & Orlando used ch 2, but were they close enough to cause co-channel to each other?
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#49
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I would suspect not. Even though Florida is famously flat (the highest point is 340 feet above sea level!), Miami and Orlando are still 200+ miles apart…
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#50
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I grew up in SC and there were two channel 4's roughly 200 miles apart. One in Charleston and the other was in Greenville. At one point I worked for the one in Charleston (WCIV) and I never heard of any co-channel interference problems.
Now, in the US, stations were assigned an offset of + or - 10kHz. which would reduce the possibility of interference.
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Last edited by kf4rca; 04-07-2022 at 06:37 AM. |
Audiokarma |
#51
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Lo Band VHF for TV in the US and Canada did have its problems. During the summer months the Lo VHF (54-88 MHz) was plagued by co-channel interference between stations even thousands of miles distant. Even a relatively local channel could be wiped out by a strong co-channel station more than 1000km away.
In June 2009, during the "Nightlight" period of the US analog to digital transition, most of the TV stations across the US had already vacated the Lo VHF band with a few remaining nightlight stations only running transition promo loops. I did some DXing from where I then lived in Carbondale Illinois which is almost exactly in the middle of the Continental US. This is what I received in mid June 2009. I captured video clips of their IDs on my cell phone. The receiver I used was an unmodified RCA Victor TV model 8T243 made in 1948-49. I used a 50ft mast VHF-UHF antenna with rotator. The direction of the antenna position varied as the ducted signal sometimes curved along its travel: CKCK Channel 2 Regina Sask. 2000km CBAT channel 4 Fredericton NB 2000km WGBH channel 2 Boston MA 1500km WPBT channel 2 Miami FL 1200km XEFB channel 2 Nuevo Leon 1400km KRMA channel 6 Denver CO 1500km KASA channel 2 Santa Fe NM 1600km KPHO channel 5 Phoenix AZ 2000km Last edited by Penthode; 05-03-2022 at 10:50 AM. |
#52
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Unfortunately, however, since I moved to my current residence 21 years ago, I haven't seen any TV DX, since my TV is connected to Spectrum "streaming" TV service, without a cable box (I have been informed by Spectrum that, since I now have this service, I no longer have traditional cable, and so do not need a box). From this, I am thinking the cable operator may not be using traditional cable boxes any longer; however, this is just a guess, although with streaming cable, I am honestly not sure what is going on. I do know, however, that my charge for this service is just under $30 a month; it would be a lot higher, I'm sure, if I had a cable box. Being a senior citizen on a fixed income, this is welcome news, as I honestly do not want or need an additional charge (for a cable box or anything else associated with my television service) on my bill. The additional charges (two) on my cable bill are for Internet and home telephone service.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 05-09-2022 at 10:06 PM. |
#53
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“ KWGN-TV, channel 2, somewhere out west, 2000 miles from where I lived at the time (I cannot for the life of me remember where the station was located”
Denver Colorado, about 1250 miles from Cleveland....good dx catch. jr |
#54
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