grasmere59 Posted March 28, 2009 Share Posted March 28, 2009 My neighbour asked me to pose the question,he uses his caravan mostly to attend steam rallies during the summer and has no access to EHU's,most LCD tv's i've seen run through a transformer to 12v dc,could he just find a suitable lead and power the tv straight from the 12v socket in the caravan and save a fortune not having to buy a dedicated 12v/240v tv,Asda do a 15" for £90. Quote 2012 Freelander SD4 HSE towing a 2007 Elddis Sunstyle GT 482 Link to comment Share on other sites More sharing options...
Legsmaniac Posted March 28, 2009 Share Posted March 28, 2009 It's what I have and have no problems. My 15" LCD 12/230V TV came as a bargain from Currys with built in DVD player. I made my own lead up with a plug from Maplin Electronics. Quote Carry On Camping! Legsmaniac's World -my own personal web space with campsite reviews - http://www. legsmaniac. org. uk Link to comment Share on other sites More sharing options...
Guest madrat Posted March 28, 2009 Share Posted March 28, 2009 Same here, TV from Curry's 12V lead from my box of bits in the shed. I do always fit one of these http://www. satcure. com/tech/diode. htm in to the power lead though for any 12v appliance that can be sensitive. Quote Link to comment Share on other sites More sharing options...
Bobinet Posted March 28, 2009 Share Posted March 28, 2009 (edited) b Edited March 26, 2010 by Bobinet Quote Link to comment Share on other sites More sharing options...
RADIOTWO Posted March 28, 2009 Share Posted March 28, 2009 Same here, TV from Curry's 12V lead from my box of bits in the shed. I do always fit one of these http://www. satcure. com/tech/diode. htm in to the power lead though for any 12v appliance that can be sensitive. So what does the diode do then? Radiotwo Quote Steve - Land Cruiser Amazon Auto + Pageant Series 5 Champagne The match between car and caravan is perfect in accordance with a mix of European standards. However, according to the British Towing Code the percentage (loaded caravan / kerbweight tow car) is 49%. Link to comment Share on other sites More sharing options...
Guest madrat Posted March 28, 2009 Share Posted March 28, 2009 Prevents a voltage of more than 12. 6 volts passing. voltage from a freshly charged battery can be higher as it can if you have your charger switched on. I use one inn the power lead of the TV and Sky box Quote Link to comment Share on other sites More sharing options...
RADIOTWO Posted March 28, 2009 Share Posted March 28, 2009 (edited) Prevents a voltage of more than 12. 6 volts passing. voltage from a freshly charged battery can be higher as it can if you have your charger switched on. I use one inn the power lead of the TV and Sky box Who told you that ! and as you would not have the charger on as there is no mains there is no need to ristrict to 12. 6 Volts A BY255 diode does not prevent voltage of more than 12. 6 Volts, it is a MEDIUM CURRENT PLASTIC RECTIFIER and it is rated at 3 Amps, so a drawing more than 3 amps will blow it like a fuse A standard diode will stop voltage one way, but allow the other, but will drop the voltage . 6 volt so if you had 13. 2volts then it would drop it to 12. 6 but if it was more than 13. 2, it would still only drop it . 6volt Radiotwo Edited March 28, 2009 by RADIOTWO Quote Steve - Land Cruiser Amazon Auto + Pageant Series 5 Champagne The match between car and caravan is perfect in accordance with a mix of European standards. However, according to the British Towing Code the percentage (loaded caravan / kerbweight tow car) is 49%. Link to comment Share on other sites More sharing options...
Guest madrat Posted March 29, 2009 Share Posted March 29, 2009 http://www. satcure. com/accs/page12. htm#javelin Its an added safety feature to stop it getting over 12. 6 volts. which is easily done if you forget whilst on site with EHU. Quote Link to comment Share on other sites More sharing options...
RADIOTWO Posted March 29, 2009 Share Posted March 29, 2009 http://www. satcure. com/accs/page12. htm#javelin Its an added safety feature to stop it getting over 12. 6 volts. which is easily done if you forget whilst on site with EHU. As I said in my other post IT WILL NOT STOP IT GOING OVER 12. 6 VOLTS all it will do is drop . 6 of a volt, but on the other hand if the battery is at say 11. 8 volts it will drop to 11. 2volts, and the TV might not work, as there is not enough voltage so the best thing to do is use the 240V to 12Volt adaptor when on a EHU and just use the direct voltage from the battery when not on a EHU Radiotwo Quote Steve - Land Cruiser Amazon Auto + Pageant Series 5 Champagne The match between car and caravan is perfect in accordance with a mix of European standards. However, according to the British Towing Code the percentage (loaded caravan / kerbweight tow car) is 49%. Link to comment Share on other sites More sharing options...
Artleknock Posted March 29, 2009 Share Posted March 29, 2009 As I said in my other post IT WILL NOT STOP IT GOING OVER 12. 6 VOLTS all it will do is drop . 6 of a volt, but on theother hand if the battery is at say 11. 8 volts it will drop to 11. 2volts, and the TV might not work, as there is not enough voltage so the best thing to do is use the 240V to 12Volt adaptor when on a EHU and just use the direct voltage from the battery when not on a EHU Radiotwo And here's me starting to think that using a 12v lead would be a good idea to save wires and boxes on the cupboard top Quote 'I know' is just 'I Believe' with delusions of grandeur Mitsubishi Outlander 2.4 PHEV 4H Unicorn 4 Cadiz Link to comment Share on other sites More sharing options...
Alan J Posted March 29, 2009 Share Posted March 29, 2009 Hi I have the Pace Javelin and run it and the Avtec 19" TV on 12v all the time without any problems on EHU, Non EHU & Fuel Cell no problems at all. A 230v supply can and does vary between 210v to 250v and 230v appliances are designed to cater for this and so are 12v appliances (surely). Quote Alan JBailey Pageant S6 Bordeaux Tow Car BMW X5 3. 0D Link to comment Share on other sites More sharing options...
Legsmaniac Posted March 29, 2009 Share Posted March 29, 2009 I've read many reports of concerns running 12V appliances when hooked up to the EHU but I have never had any problems myself. As an electronics engineer, I do agree with RadioTwo though that the diode posted above is pointless, it's a diode and not a voltage regulator. If it had been a Zener Diode rated 12V that might have been better but a voltage regulator is the better way to go if you really want to protect your equipment. As I said, I don't have any problems with my 15" LCD TV and Pace Javelin satellite box, both have worked fine from 14. 5V to 10V since they both have their own regulator circuitry built in. Quote Carry On Camping! Legsmaniac's World -my own personal web space with campsite reviews - http://www. legsmaniac. org. uk Link to comment Share on other sites More sharing options...
Guest madrat Posted March 29, 2009 Share Posted March 29, 2009 (edited) Hmm I might just remove them then. No hang on I know why I fitted them now. (senior moment) Its for when we use the geny to top up the battery. Edited March 29, 2009 by madrat Quote Link to comment Share on other sites More sharing options...
RADIOTWO Posted March 29, 2009 Share Posted March 29, 2009 (edited) Hmm I might just remove them then. No hang on I know why I fitted them now. (senior moment) Its for when we use the geny to top up the battery. Sorry mad I may be missing the point, but you say they are there for when you are using the geny to top up the battery ! I assume you mean the 12v output from the geny ? If so don't use any sensitive equipment at all (even with the diode) as a genny can go up to 20Volts, so . 6v off 20 is still 19. 4 Volts !! Radiotwo Edited March 29, 2009 by RADIOTWO Quote Steve - Land Cruiser Amazon Auto + Pageant Series 5 Champagne The match between car and caravan is perfect in accordance with a mix of European standards. However, according to the British Towing Code the percentage (loaded caravan / kerbweight tow car) is 49%. Link to comment Share on other sites More sharing options...
Guest madrat Posted March 29, 2009 Share Posted March 29, 2009 No the geny powers the 240V battery charger via a surge protector. When the charger is on the battery voltage goes over 12. 8 volts Quote Link to comment Share on other sites More sharing options...
Legsmaniac Posted March 29, 2009 Share Posted March 29, 2009 I believe the reason you're using the diode is to act as a half-rectifier to help smooth the AC ripple which can occur from cheap generators. Ideally, you would need at least two diodes for a proper half-rectifier but I guess one is better than nothing. Quote Carry On Camping! Legsmaniac's World -my own personal web space with campsite reviews - http://www. legsmaniac. org. uk Link to comment Share on other sites More sharing options...
beejay Posted March 30, 2009 Share Posted March 30, 2009 The original link in post no 3 was to the Satcure site regarding the diode. Some of the article is missing as the intended use for the diode was to drop 1 volt in a supply lead to prevent damage to 12 volt equipment. Quote Link to comment Share on other sites More sharing options...
RADIOTWO Posted March 30, 2009 Share Posted March 30, 2009 The original link in post no 3 was to the Satcure site regarding the diode. Some of the article is missing as the intended use for the diode was to drop 1 volt in a supply lead to prevent damage to 12 volt equipment. Hi Beejay But even the info on the link is incorrect, a diode does not drop 1v a diode drops . 6volt Radiotwo Quote Steve - Land Cruiser Amazon Auto + Pageant Series 5 Champagne The match between car and caravan is perfect in accordance with a mix of European standards. However, according to the British Towing Code the percentage (loaded caravan / kerbweight tow car) is 49%. Link to comment Share on other sites More sharing options...
beejay Posted March 30, 2009 Share Posted March 30, 2009 The original link in post no 3 was to the Satcure site regarding the diode. Some of the article is missing as the intended use for the diode was to drop voltage in a supply lead to prevent damage to Pace 12v Digiboxes quote from Satcure website "Pace specify a maximum of 12. 6 volts. If you use a 12v battery the voltage could be higher so you should connect a 1N5408 diode to the + wire." Quote Link to comment Share on other sites More sharing options...
RogerL Posted March 30, 2009 Share Posted March 30, 2009 The original link in post no 3 was to the Satcure site regarding the diode. Some of the article is missing as the intended use for the diode was to drop voltage in a supply lead to prevent damage to Pace 12v Digiboxes quote from Satcure website "Pace specify a maximum of 12. 6 volts. If you use a 12v battery the voltage could be higher so you should connect a 1N5408 diode to the + wire." Reading that statement - that simply takes into account that a fully charged 12v battery on it's own can be 12. 8v - hence the need to drop the voltage - it doesn't take into account any charging voltage which could be higher. Quote Link to comment Share on other sites More sharing options...
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