Trace 0 Report post #1 Posted September 16 Looking to replace my TV which is currently 12volt, do I need 12volt or will any TV do. Share this post Link to post Share on other sites
Jen-in-Wellies 1262 Report post #2 Posted September 16 (edited) Welcome to the forum. Do you have 240V pure sine wave available on board? Edited September 16 by Jen-in-Wellies Share this post Link to post Share on other sites
Goliath 355 Report post #3 Posted September 16 (It’s been nearly an hour and no one has remarked on the apostrophe. Is Athy asleep?) I think the TV has to have a 12v option. dunno Share this post Link to post Share on other sites
nbfiresprite 333 Report post #4 Posted September 16 You can always not bother with replacing the Gogglebox and go and do something less boring instead. 2 Share this post Link to post Share on other sites
LadyG 691 Report post #5 Posted September 16 (edited) Refering to the subject of televisions, perhaps? I inherited a smart TV, so far, it has done absolutely nothing. Edited September 16 by LadyG Share this post Link to post Share on other sites
Nightwatch 971 Report post #6 Posted September 16 We have a telly that is both 12v and 240v. We have created a choice. Share this post Link to post Share on other sites
LadyG 691 Report post #7 Posted September 16 5 minutes ago, Nightwatch said: We have a telly that is both 12v and 240v. We have created a choice. Decisions, decisions, you have created a perfect storm Share this post Link to post Share on other sites
Goliath 355 Report post #8 Posted September 16 I too have a Tv which is 12v and 240v plus an iPad upon which I watch iplayer I have created a further choice Share this post Link to post Share on other sites
LadyG 691 Report post #9 Posted September 16 (edited) 4 minutes ago, Goliath said: I too have a Tv which is 12v and 240v plus an iPad upon which I watch iplayer I have created a further choice I have two tablets and two mifi's ..... Not sure if that creates choice or chaos, they both seem to be imperfect. My phone also has some irregular imput Edited September 16 by LadyG Share this post Link to post Share on other sites
Cheshire cat 156 Report post #10 Posted September 16 Someone on here offered an opinion that better decoders were fitted to 240 volt tv so I took them at their word and bought a 240 Volt LG TV. With an omnimax aerial attached to a signal booster it has never failed to find 100+ tv stations. Share this post Link to post Share on other sites
Goliath 355 Report post #11 Posted September 16 6 minutes ago, LadyG said: I have two tablets and two mifi's ..... Not sure if that creates choice or chaos, they both seem to be imperfect. My phone also has some irregular imput You win. Just a shame there’s never owt on TV to make the hassle worth while. Share this post Link to post Share on other sites
Richard10002 2369 Report post #12 Posted September 16 9 minutes ago, Cheshire cat said: Someone on here offered an opinion that better decoders were fitted to 240 volt tv so I took them at their word and bought a 240 Volt LG TV. With an omnimax aerial attached to a signal booster it has never failed to find 100+ tv stations. You might find that the power adapter provides the TV with 19V DC. At least that's what I found with a 24" LG I owned for a while. Also saw a lot of bigger Sony TVs, (up to 40" or so), an adapter to convert 240V AC to 19V DC. Share this post Link to post Share on other sites
TheBiscuits 3128 Report post #13 Posted September 16 14 minutes ago, LadyG said: My phone also has some irregular imput Yeah, we have noticed! Sorry, couldn't resist. 1 4 Share this post Link to post Share on other sites
Dr Bob 2744 Report post #14 Posted September 16 41 minutes ago, LadyG said: I have two tablets I took 3 today. One was a vitamin D tablet and the other two were echinaecia. Stops colds you know! Don't tell Donald. 43 minutes ago, LadyG said: ............ also has some irregular imput .......better than irregular output!😎 Share this post Link to post Share on other sites
Tracy D'arth 335 Report post #15 Posted September 16 Many mains TVs are really 12v ones and include an adaptor box to work off mains. Our Bush is like that. Its not too easy to find out which models are like this, I went into Argos and they were very good, opened a few boxes to discover if they worked on 12v, it doesn't say on the outside of the box. Then you can get a 12v stabilised adaptor to run it safely off the batteries when the alternator is pumping out 14 + volts. Share this post Link to post Share on other sites
Richard10002 2369 Report post #16 Posted September 16 2 minutes ago, Tracy D'arth said: Many mains TVs are really 12v ones and include an adaptor box to work off mains. Our Bush is like that. Its not too easy to find out which models are like this, I went into Argos and they were very good, opened a few boxes to discover if they worked on 12v, it doesn't say on the outside of the box. Then you can get a 12v stabilised adaptor to run it safely off the batteries when the alternator is pumping out 14 + volts. If you go into John Lewis, you can see the back of most of the TVs they sell. You can quickly see whether the input cable is DC or AC then, if it's DC, you can get a bit closer and see the voltage. Share this post Link to post Share on other sites
WotEver 3123 Report post #17 Posted September 16 1 minute ago, Richard10002 said: If you go into John Lewis, you can see the back of most of the TVs they sell. You can quickly see whether the input cable is DC or AC then, if it's DC, you can get a bit closer and see the voltage. It doesn’t actually matter that much what the D.C. voltage is. You can get 12V adaptors that supply all sorts of voltages. 1 Share this post Link to post Share on other sites
David Mack 1302 Report post #18 Posted September 16 1 hour ago, nbfiresprite said: You can always not bother with replacing the Gogglebox and go and do something less boring instead. 1 Share this post Link to post Share on other sites
Chewbacka 565 Report post #19 Posted September 16 52 minutes ago, WotEver said: It doesn’t actually matter that much what the D.C. voltage is. You can get 12V adaptors that supply all sorts of voltages. Even 220v 😱 1 Share this post Link to post Share on other sites
blackrose 1433 Report post #20 Posted September 17 (edited) 7 hours ago, Jen-in-Wellies said: Welcome to the forum. Do you have 240V pure sine wave available on board? You don't necessarily need a pure sine wave inverter. Mine is semi-sine wave and the TV works fine. Edited September 17 by blackrose Share this post Link to post Share on other sites
ditchcrawler 1685 Report post #21 Posted September 17 6 hours ago, blackrose said: You don't necessarily need a pure sine wave inverter. Mine is semi-sine wave and the TV works fine. But some hum, its a bit late when you have bought it to find the set up doesnt work Share this post Link to post Share on other sites
Jen-in-Wellies 1262 Report post #22 Posted September 17 (edited) 1 hour ago, ditchcrawler said: But some hum, its a bit late when you have bought it to find the set up doesnt work This is why I said pure sine wave. I get hum over the speakers when I run things from the cheapo emergency backup inverter the couple of times when the posh Victron throws a tantrum. There are higher frequency harmonics in the modified sine wave that can get through to the speakers sometimes. Jen Edited September 17 by Jen-in-Wellies 1 1 Share this post Link to post Share on other sites
WotEver 3123 Report post #23 Posted September 17 5 hours ago, Jen-in-Wellies said: There are higher frequency harmonics in the modified sine wave that can get through to the speakers sometimes. Yep. If you draw a sine wave then add the second harmonic over the top, then the third, and keep going... you get a square wave Share this post Link to post Share on other sites
Scholar Gypsy 296 Report post #24 Posted September 18 (edited) 17 hours ago, WotEver said: Yep. If you draw a sine wave then add the second harmonic over the top, then the third, and keep going... you get a square wave Indeed, you can get any periodic waveform you like (eg square) by adding harmonics at the right amplitudes. Fourier series/transform theory, which I have not quite forgotten. Edited September 18 by Scholar Gypsy Share this post Link to post Share on other sites
Halsey 299 Report post #25 Posted September 18 to get this back on track - Avtex would be my go to as good picture and sound and they also cope well with knocks and falling over if bumped in locks etc Share this post Link to post Share on other sites
