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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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8th Dec 2018, 11:40 am | #21 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: Long Wave during the War
Richard. Ahem, you are spot on. As Capt Mainwaring would say, thank you Richard...I was wondering when someone would spot my deliberate mistake. Carry on Sergeant.
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8th Dec 2018, 3:36 pm | #22 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,998
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Re: Long Wave during the War
There were (and still are) non-directional navigation beacons on LW.
WWII-receivers like the R1155 and one of the US "Command" receivers (R23/ARC5 - BC453-B) covered LW for beacon reception. The BC453B was popular with hams after WWII as an "additional IF" for improving the selectivity of shortwave receivers whose IF was between 150 and 500KHz. You tuned your 453B to the IF of your main receiver; the 453B then in turn converted this to a lower IF( 85KHz) where it was easier to get good selectivity without needing crystal-filters etc. See here: https://www.pa3esy.nl/military/us/ai...f/FavRx002.pdf |
9th Dec 2018, 1:03 pm | #23 |
Dekatron
Join Date: Jan 2006
Location: Ramsbottom (Nr Bury) Lancs or Bexhill (Nr Hastings) Sussex.
Posts: 5,817
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Re: Long Wave during the War
Like Steve I was surprised not to have known about this place, given that I've read around War Time Radio activities like a lot of Forum members. Clearly the maximum security/secrecy was maintained for quite a while [like Bletchley]! The "Hidden History in Holderness" BBC page [2006] suggests that it's sale to a local farmer for £5k [in 1959] was a bargain but it was quite a lot of money really!
It says that the site itself was selected as a dedicated facility to replace the temporary use of existing ones in the south. I wonder if that decision related to keeping things quiet or was there some geographical advantage there, re broadcasting to Europe? I recall that there was a TX Station related to Shipping [but much smaller] on the coast near Hull. It was featured in [I think] the BVWS Bulletin [or it could have been Radio Bygones] some time [?] in the nineties when it was closed down and also sold off! Dave |
9th Dec 2018, 1:17 pm | #24 |
Dekatron
Join Date: Dec 2004
Location: East Yorkshire, UK.
Posts: 3,987
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Re: Long Wave during the War
Hi Dave, Humber radio, was for the Trawlers and shipping. There is also have an aircraft beacon at Ottringham its about 3 miles or so to the west of the OSE5 site. The area known as Holderness is very flat, I think that may be one of the reasons it was chosen for radio activity.
John. Last edited by 60 oldjohn; 9th Dec 2018 at 1:33 pm. |
9th Dec 2018, 2:00 pm | #25 |
Dekatron
Join Date: Jan 2006
Location: Ramsbottom (Nr Bury) Lancs or Bexhill (Nr Hastings) Sussex.
Posts: 5,817
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Re: Long Wave during the War
Thanks John. I lived in Hull for a year in 1969 and have often regretted that I didn't stay there. I wouldn't have known anything about the war time history of course but I was impressed by being able to get both Yorkshire and Anglia TV!
Dave |
9th Dec 2018, 2:59 pm | #26 |
Moderator
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Location: Ipswich, Suffolk, IP4, UK.
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Re: Long Wave during the War
Until July 1974 the Belmont transmitter broadcast Anglia TV.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
9th Dec 2018, 5:13 pm | #27 |
Hexode
Join Date: Jan 2012
Location: Weymouth, Dorset, UK.
Posts: 422
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Re: Long Wave during the War
I think to say than longwave propagation isn't affected by skywave is wrong anyone who listened to Atlantic 252 will tell you that at nite the Algerian station which shared the frequency was a big nuisance in fact during winter it can still be heard clearly over the top of what is now RTE1 on that frequency. Also I'm told that listeners to radio 4 on 200 Kc/s could here the high power radio Moscow transmitter faintly underneath it at nite and again even in the day during winter.
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9th Dec 2018, 8:00 pm | #28 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
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Re: Long Wave during the War
The site had a sea-path right into the target area, so less attenuation on the LW broadcasts, and probably good communications links via the PO circuits for programme feeds. It would also have been (mistakenly, as it happens) considered relatively safe from air-raids.
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9th Dec 2018, 8:59 pm | #29 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
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Re: Long Wave during the War
I expect I was wrong about the location being partly decided on air-raids, as the entire site was built in individual bomb-proof buildings with an underground control centre. My assertion regarding PO feeds and sea-path stands.
Before Ottringham (OSE5) went to-air, the LF group broadcasting the European Service consisted of the 5XX LF transmitter at Droitwich (as mentioned in post 6); the original 5XX 30kW LF transmitter at Daventry, and an STC 15kW LF set at Brookman's Park.
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Regds, Russell W. B. G4YLI. |
9th Dec 2018, 10:43 pm | #30 |
Dekatron
Join Date: Dec 2004
Location: East Yorkshire, UK.
Posts: 3,987
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Re: Long Wave during the War
I only know of one bomb that landed within a mile of OSE5, though there may have been more. Situated 12miles east of Hull the station must have been very lucky as Hull was High on the list of most bombed City's in the UK. I would have expected OSE5 to have been a prime target.
John. |
10th Dec 2018, 12:02 am | #31 |
Hexode
Join Date: Jan 2012
Location: Weymouth, Dorset, UK.
Posts: 422
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Re: Long Wave during the War
It makes you wonder what reception in Europe was like with the original low power network on LF. I think Ottringham must of been a big improvement. Although saying that I can sometimes hear the Czech 50 kW on 271 kc/s these days though the noise level is very high, whereas back then it would of been fairly noise free.
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10th Dec 2018, 11:01 am | #32 | |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
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Re: Long Wave during the War
Quote:
Ottringham could broadcast one programme on 800kW (600kW in practice) or four programmes at 200kW each.
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Regds, Russell W. B. G4YLI. |
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