All posts by Graham Lewendon
Below are all of Graham Lewendon's postings, with the most recent are at the bottom of the page.
Maybe the airline wanted to avoid carless passengers stumbling and hurting your foot so avoiding being sued.
Nice to have someone who knows what they are talking about regards tech stuff
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Steve;
Try reading book "Sour Grips by Simon Carr" ISBN 0-7499-5119-2
Its about accident claims paid out to persons in UK and US and the pay outs are in megga bucks. Remember the clause in the HSE regulations under heading of duty of care and also that it has to be demonstated that all reasionable care was taken to provent injury. Being able to later show in court the bill paid by passengers insurance company may be seen as such should a passenger later attempt claim under a clause within health & safety law(S)Maybe there is someone reading this who is qualified to clarify just what the air line was obliged to do to protec its passenger. Would the insurance company have paid up if airline action was inccorect?
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This may be of interest to those able to perform own dish installation / setup.
In 1991 i installed my own 1 meter prime focus H-H ku band dish with out instruments other than the drake tuner and rf feed to a shaded TV visible from dish when up ladder Using a method by which Rai uno was pre-tuned and peaked by manual dish movement then repeating procedure for other Sats east & west the dish is slowly peaked until in those days I was able to receive almost sparkle free TV from weak channels of Intelsat at 1 west (TVN) and the Russian inclined orbit sats a little more to the west plus pan am sat way over at 45 west with Gala vision + feeds etc. Of course in analogue. On trick I used then to peak the dish was to attenuate the incoming signal to the feed horn by finding a sheet of paper or any similar that slightly degraded the reception to negate the effect of the receivers AGC circuits then adjust dish to fine adjust alignment making reception even better using weaker and weaker sats until no improvement is found also adding layers of sheeting to furthur weaken incomming signal. I don't know if this would work on fixed dishes aimed at 28.2 east of south but I have noticed that the most critical downlink seems to be "Euro news" if that sig is clean I find all the others are faultless via a 45 cm dish On factor I have noticed in reading comments from others with sat reception problems is no one seems to now state what the LNB noise figure is. It was an important parameter in 91
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Re useing TV as tuner for recording device
check out this web site
http://www.js-technology.….pdf (study details for pins 1-3-19)
Once in mid 90's I had home made skart lead for a now scrapped Sasio CRT set that would feed vidio & audio to VCR input and could have recorded whatever Sasio tuner was turned to had I needed to. However I never used mode as all recording devices had built in tuners at time.
At this time I had a split home made skart lead used to connect two sattelite recievers (Stearable dish) & (fixed dish D2MAC) to Sasio TV & found if I took a skart connector from either of the sattelite tuners rear skart sockets and inserted it instead into one of the skart connectors on rear of the sasio TV and place the skart connector that normally fed sat video opto TV into VCR video input the VCR was able to see Sasio's tuner op and used second TV with RF input set up from VCR to monitor restult - This was nothing more than an experiment to see what would happen. It was of no real use to me & set up was reverted to normal running after experiment.
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NB:- Re using TV as tuner for externail recorder
My current sony LED 32" fst will send video to correctly attached recoder (Skart lead)
Again mode not used.
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Re dogs
Totally agree and talking over end credits or fade in of other program details levae the credits as made by program makers
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To any user of short wave radio these home plugs are bad news as they are know to effectivly jam the short wave spectrum making it just about inpossible to enjoy reception on the band and there are times when it is not possible to use web radio instead and not every one has access to the internet but would use short wave instead.
Use a eithernet cable for a fraction of price (and thats the fastest connection to cable in street anyway) or set up a network using a proper wireles router instead and dont produce RFI all over the spectrum SWL since 1980 88 & 73's who know what the digits mean oh that will be all the radio hams in the world Good DX'ing too
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re Stephen
Thursday 8 December 2011 6:56PM
Your problem is controlling the polarity of signal passed by LNB on dish (The LNB is a frequency changer and amplifier converting the 10.???? gigahertz signal sent by satellite down to 1 Gigahertz which is easier to send down the cable connecting dish to indoor unit (satellite set top box) but all satellites use polarisation either horizontal of vertical and some satellites also use circular polarisation and then it can be right or left-handed.) So the channels output from satellite alternate from one to the other polarisation setting be it vertical/horizontal or circular polarisation this is to help separate the signals and reduce cross or co channel interference. The polarisation setting is controlled by sending a short pulse up the single wire from indoor unit to LNB say around 28 VDC to select vertical or Around 23 for horizontal setting the same control system is implemented if the transmitting satellite uses circular polarisation.
Now if two indoor units are connected to the LNB output each indoor unit is trying to control polarity LNB is set to and it can only be set to one option. You need to understand that single output LNB's are really two units inside one body each one handling a single polarity and the pulse triggers a switching action from one to the other. To have two indoor units working from one dish with only one LNB attached you require a dual output LNB which will have two connections one for each indoor unit so one goe's to indoor unit in room number one and the other one goe's to indoor unit number two via two cables. Thus it follows that if you happen to have sky plus in one room and a dual freesatt tuner in another room a quadruple output LNB is required to send a signal independently controllable to each tuner via 4 cables! SMATV systems may do it with fewer cables but at greater cost. I have described the cheapest and simplest way I know. The quad OP LNB set up works for me with dual free satt and Sky plus tuners. Please work safely on ladders and isolate indoor units from mains before working outside on dish also if your not confident up a ladder seek help from a profesional C.A.I member. Remeember that the inner core conductor must not short to the outer foil or braid of the cable and or "F" connector body as if it did the indoor unit will be made inoperable at power up time. I can not help with damaged equipment since it is a speacilised repair function.
I have since 1990 installed various systems for own use and or relations including horizion to horizion 1 metre steerable dish systems during which I leant that the smallest dish movement can effect recieved signal qaulity so never steady your self up ladder by holding any part of dish mount
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RE ronan o dwyer
Tuesday 28 February 2012 8:30PM
Manx radio via FM
Have you tried a google search?
I found many dealers online with a simple search.
I'm located in the NW corner of Essex and could get Capital FM from Crystal Palace on a 6 element antiferance yargi all through the 80's & 90's up till I upgraded two years back to an 8 element yargi pointing the 6 element sort of towards BBC oxford, Good luck
Don,t forget hight is important as is a low loss down lead with no joints in the run Re hight signal quadrouples each time hight doubles , but beware signal loss in feeder
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Thursday 21 April 2011 3:10PM
All freeview tuners have lost Dave & sky news
Tuners range in age & type NB :-one was only instaled Monday 18-04-2011 is hd enabled which it tunes all 4 HD offerings fine have checked for engineering work on anglia TX seems switch over compleated ok so why no sky news or is problem inversion issue?