derekn Posted September 14, 2005 Share Posted September 14, 2005 Has anyone set up a 24 volt to 12 volt dipper? I would like to set up the lightweight with a CB and an outlet for a 12 volt cooler box. Has anyone experience with this? Any advice would be appreciated. Cheers Derek '82 Lightweightairportablehalfton B) Quote Link to comment Share on other sites More sharing options...
minivin Posted September 14, 2005 Share Posted September 14, 2005 Lets see whats on ebay: 10Amp 24->12 20Amp 24-12 6Amp 8Amp Another option is to look into Army surplus or truck part suppliers, ministry uses 28/24V and trucks use 24V so they may have better prices or range of items Quote Link to comment Share on other sites More sharing options...
mpb Posted September 14, 2005 Share Posted September 14, 2005 I fit a lot of 12 volt kit into HGV's I use the Alfatronix Power convertors. These are expensive but come with a lifetime garantee. Really easy to connect up. A fused 24 volt supply +ve and earth go in and a +ve and earth come out. For a CB id use a 6 amp continuous with a peak of 10 amps. Hope this helps Martin 1996 Defender 90 Quote Link to comment Share on other sites More sharing options...
Mark Posted September 15, 2005 Share Posted September 15, 2005 I added a 10Amp 24-12V converter on our FFR Lightweight. I picked it up at an autojumble, so I don't really know it's heritage This has been used to power the CB socket, and a 12V lighter socket (to charge my phone!) It also runs the Lumenition ignition module, and the LPG system, and so far I have not had any trouble. I also have a civvy distrubutor, coil and plugs, but thats a whole other story! The Converter is installed in the box under the bonnet usually used to store the Jack in, with it's own Fuse box for distribution. I can do some pictures tonight if you are interested. Incidentally, you can get 12 (ish) volts from the dropper box on top of the engine, but I wouldn't recommend it. I believe you can also ger 12V from the alternator if you find the right pin, but I don't know what sort of current that would be (You can get 240 out of it too, but at naff all current! ). Cheers Mark Quote Link to comment Share on other sites More sharing options...
derekn Posted September 16, 2005 Author Share Posted September 16, 2005 Pictures of the set up would be great Mark. Many Thanks for the info, it is all helpfull. Cheers Derek '82 Airportable B) Quote Link to comment Share on other sites More sharing options...
Mark Posted September 16, 2005 Share Posted September 16, 2005 Derek, I will do a couple of pictures for you this evening. Cheers Mark Quote Link to comment Share on other sites More sharing options...
Mark Posted September 17, 2005 Share Posted September 17, 2005 Some pictures of the dropper setup: The Dropper: The general Layout: This shows the Fuse box, which gives 3 Permanent 12V Feeds and 3 Switched Feeds on the ignition. The relay is switched by the ignition, which then switches on the 12V supply. This is the panel on the dash: The switch and lamp are for the fog light (24V). There is also a cigarette lighter socket (12V) the areial socket for the CB and a 3-pin XLR which provides both a permanent and switched feed depending on what is required by whatever I want to plug in there. I hope that helps. Cheers Mark Quote Link to comment Share on other sites More sharing options...
Mike4mud Posted September 17, 2005 Share Posted September 17, 2005 That's a neat setup Mark. Do you need a home for the old shielded distributer and leads? Quote Link to comment Share on other sites More sharing options...
Mark Posted September 18, 2005 Share Posted September 18, 2005 That's a neat setup Mark.Do you need a home for the old shielded distributer and leads? Mike, I did the conversion a couple of years ago, and the dizzy and leads were very quick to disappear to a mate with a 109 ffr! Cheers Mark Quote Link to comment Share on other sites More sharing options...
yojimbo Posted March 13, 2006 Share Posted March 13, 2006 Hi, Im in the process of fitting a dropper too. Previous owner of my '74 109 FFR fitted an electric fan - only it was a 12v one. He wired this directly ( via a cheap switch) to one of the batteries to get 12v. However, this causes one of the batteries to fail in relatively a short period of time ( probably from overcharging) would a 10A dropper be sufficient to run the fan, cb and an aux socket? Also, whats the actual battery spec for a 109 FFR 24v? It has a pair of 365CCA/70A's at the moment. Is this enough? thanks, des Quote Link to comment Share on other sites More sharing options...
ianc Posted April 5, 2006 Share Posted April 5, 2006 Bear in mind that most voltage droppers will draw a small amount of current so if the vehicle sits for long periods between use it will run the batteries down - as I found out! I have fitted a switch to disconnect the droppers when not in use. Quote Link to comment Share on other sites More sharing options...
Maarten88 Posted June 21, 2006 Share Posted June 21, 2006 I wire my dropper into the charge light circuit to prevent this. For the fan, I wired in two smaller 12v ones in series, and that seems to work ok. Maarten Quote Link to comment Share on other sites More sharing options...
SeriesShorty Posted October 2, 2008 Share Posted October 2, 2008 I added a 10Amp 24-12V converter on our FFR Lightweight. I picked it up at an autojumble, so I don't really know it's heritage This has been used to power the CB socket, and a 12V lighter socket (to charge my phone!) It also runs the Lumenition ignition module, and the LPG system, and so far I have not had any trouble. I also have a civvy distrubutor, coil and plugs, but thats a whole other story! The Converter is installed in the box under the bonnet usually used to store the Jack in, with it's own Fuse box for distribution. I can do some pictures tonight if you are interested. Incidentally, you can get 12 (ish) volts from the dropper box on top of the engine, but I wouldn't recommend it. I believe you can also ger 12V from the alternator if you find the right pin, but I don't know what sort of current that would be (You can get 240 out of it too, but at naff all current! ). Cheers Mark Wow I dug up a good old thread here. Gotta love the search feature. A few weeks ago I bought a 66 IIa ex-MoD so it's got a 24 volt system. I love Mark's converter box set up and am planning on doing the same to mine. However, I also noticed your statement regarding using the civilian spec distributor, coil, plugs and assume wires too...how did you swing that still keeping the 24 system generator and starter??? Any specifics are greatly appreciated. Jen Quote Link to comment Share on other sites More sharing options...
GIXER Posted December 4, 2008 Share Posted December 4, 2008 The ignition system of an ffr landrover is 12 volts exept when starting when its 24 volts aids cold start Quote Link to comment Share on other sites More sharing options...
SeriesShorty Posted January 8, 2009 Share Posted January 8, 2009 The ignition system of an ffr landrover is 12 volts exept when starting when its 24 volts aids cold start So in essence, I would only need to swap my distributor, coil and plugs/wires from the shielded style that it currently has to the standard civilian counterparts? In the US, it is very expensive to source these shielded tune-up parts so it would be great to be able to run civilian bits while still keeping the 90amp generator. Is this correct? Quote Link to comment Share on other sites More sharing options...
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