JsionyRN Posted October 24, 2020 Share Posted October 24, 2020 Good EveningCould anyone tell me if any of the TTS decoders are suitable for a Heljan class 26 (H2601) and Bachman Class 25 (32-402)regards jsionyRN Link to comment Share on other sites More sharing options...
Sultan Posted October 26, 2020 Share Posted October 26, 2020 You can use any TTS decoder in any loco if it has an 8 pin socket. Unfortunately none of the TTS decoders feature the Sulzer 6 cylinder 6LDA28 power units used in class 25 or 26. The class 47 TTS decoder would not be suitable either as the class 47 was fitted with a Sulzer 12 cylinder 12LDA28-B pwer unit. Have a look on YouTube for footage of full size class 25 and 26 locos. Link to comment Share on other sites More sharing options...
Chrissaf Posted October 26, 2020 Share Posted October 26, 2020 The Bachmann is likely to have a MTC21 decoder interface [21 pin] whereas the TTS from Hornby are NEM652 interface [8 Pin]. Thus an adaptor cable would also be needed. No idea what decoder interface the Heljan has. All the Bachmann's I own are MTC21. Link to comment Share on other sites More sharing options...
Rog RJ Posted October 26, 2020 Share Posted October 26, 2020 Many Heljan loco motors are known to draw a lot of current, so a TTS decoder which is only rated at 500mA could easily be destroyed by excessive current draw. You need to check what the current draw is before installing a decoder. Link to comment Share on other sites More sharing options...
ColinB Posted October 26, 2020 Share Posted October 26, 2020 I suppose it depends on the Heljan, my class 47 has an 8 pin socket with led lights. A lot of my others have 21 pin sockets and one of them actually has bulbs which I find amazing in this day and age (I only recently bought it new). So if it has bulbs, that definitely rules out TTS decoders. You have me worried now, I recently fitted a class 47 TTS to my Heljan class 47, I better check the current. Link to comment Share on other sites More sharing options...
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