Stephen-1211844 Posted June 7, 2021 Share Posted June 7, 2021 Hi,Re: Wainwright H Class 0-4-4 T Loco R3631, DCC ready. I'm installing an 8 pin decoder R8249 in this loco (I believe it's the right one). I have it connected but I don't see how it can all fit in. Am I missing something, it just seems odd that Hornby has a chip that doesn't cram in, or do I need to consider other manufacturers. Thanks. Link to comment Share on other sites More sharing options...
96RAF Posted June 7, 2021 Share Posted June 7, 2021 Yes it is tight and installation has been covered on the forum previously, but any pictures may be lost in transit.Some folk have returned their model to Hornby to get a decoder installed. Link to comment Share on other sites More sharing options...
Howbi Posted June 7, 2021 Share Posted June 7, 2021 This is the 'H' class with a Zimo decoder installed; the Hornby R8249 decoder should fit in exactly the same way.......HB Link to comment Share on other sites More sharing options...
5Dublo2 Posted June 7, 2021 Share Posted June 7, 2021 If that is the loco I think it is, then I managed to get the decoder inside one of the side tanks. A bit of a fiddle to route he wires to get the body on, but it worked. Link to comment Share on other sites More sharing options...
Brew Man Posted June 8, 2021 Share Posted June 8, 2021 I have one of those. It was a tight fit getting the 8 pin wired decoder in but I managed it eventually, though the dome popped off during the tussle requiring to be glued back on. I'm wondering now whether a direct plug decoder would be a better fit. I have a direct plug decoder but I'm not going to take the lid of the loco again to find out. Link to comment Share on other sites More sharing options...
Stephen-1211844 Posted June 8, 2021 Author Share Posted June 8, 2021 Hi Howbi,Was the Zimmo supplied with the little pouch or did you obtain/fabricate that separately. It solves the insulation issue but might the chip not then overheat? Also, I tried fitting into the recess but felt it was too near the wheel. Link to comment Share on other sites More sharing options...
ColinB Posted June 8, 2021 Share Posted June 8, 2021 I wonder if one of those TCS ones would fit. The other thing I have done on many occasions is buy a Zimo MX617, cut the 6 pin plug off and wire it to the 8 pin plug. These come with a shorter wires so there is less issue trying to find space for the wire. Link to comment Share on other sites More sharing options...
Howbi Posted June 8, 2021 Share Posted June 8, 2021 Hi Howbi,Was the Zimmo supplied with the little pouch or did you obtain/fabricate that separately................ Hi Stephen.......yes the decoder was pre-fitted with the sleeve so, presumably, Zimo have tested it regarding heat dissipation. The decoder is MX600R, £20.........HB Link to comment Share on other sites More sharing options...
Bulleidboy Posted June 8, 2021 Share Posted June 8, 2021 The TCS DP2X-UK fits perfectly - no harness to worry about. Might be the opportunity to snip the capacitor off? Link to comment Share on other sites More sharing options...
Howbi Posted June 8, 2021 Share Posted June 8, 2021 Nice one Barry, looks like the perfect solution sunglasses........HB Link to comment Share on other sites More sharing options...
Bulleidboy Posted June 8, 2021 Share Posted June 8, 2021 Thanks Howard - I use these decoders a lot. Most of my loco's that need an 8-pin decoder are fitted with the TCS DP2X-UK - at £19 the price is good and I have not had any problems with them. Barry Link to comment Share on other sites More sharing options...
Stephen-1211844 Posted June 17, 2021 Author Share Posted June 17, 2021 I persevered and managed to fit the Hornby 8 pin chip in the recess in the side tank (they are not immediately apparent so shine a torch!). There is a recess both sides and it goes under the cabin floor slightly. I found it helped to stick a piece of insulation tape, folded over on itself, (so two sticky sides) in the recess first. Sort out the the wires so they are really neat together. Then carefully insert the decoder onto the tape holding its edges. Then insert the chip pins into place, then fold the wires around so they fit. I didn't have to use pressure from the screws to get it to sit properly when returning the loco body to the casing: it found its seating easily. Link to comment Share on other sites More sharing options...
Brew Man Posted June 17, 2021 Share Posted June 17, 2021 Well done, perseverance wins the day. I think though with any tight fit locos I get in future I'll go with the TCS direct plug one. While it's £19 it's about the same price as the Hornby chip. Link to comment Share on other sites More sharing options...
Stephen-1211844 Posted June 17, 2021 Author Share Posted June 17, 2021 Brew Man, I looked at the TCS website and they don't seem to cater for 00 guage. Does this matter? Or does one chip fit all guages, cause that could be useful. Link to comment Share on other sites More sharing options...
96RAF Posted June 18, 2021 Share Posted June 18, 2021 Decoders are not generally scale categorised. They are specified by capability, part of which is current handling. Suitability for any scale relies on matching this to a motor stall current and then finding a size to fit a particular loco along with pin/socket type. Link to comment Share on other sites More sharing options...
Brew Man Posted June 18, 2021 Share Posted June 18, 2021 @StephenDid you go to the correct TCS site, (https://uk.tcsdcc.com/)? I believe they've only recently opened the UK site and I had to look hard to find it. As Rob said, decoders aren't really categorised by scale, but looking at their list of scales it doesn't mention 00, only HO. It's because they're American. Link to comment Share on other sites More sharing options...
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