Will Hay Posted November 27, 2020 Share Posted November 27, 2020 Hmm, so I've just had a Class 37 tts delivered, which is faulty so will be returned. I noticed that the vitrains I fitted it to stutters on start and slow down, and is fine once up to speed.I assumed as a resultbof the faulty chip but having tried my vitrains class 47 it does exactly the same wirh a different tts chip and, when I remove the tts chip and put a standard, non-sound hornby decoder in the stutter disappears. Link to comment Share on other sites More sharing options...
96RAF Posted November 27, 2020 Share Posted November 27, 2020 You often have to set TTS decoders up to match a particular make of loco. This is usually by way of altering the motor algorithm. All explained in the famous manual. Link to comment Share on other sites More sharing options...
Will Hay Posted November 27, 2020 Author Share Posted November 27, 2020 Oh my god, CV150 is now '1'.What a change.I can't believe I've suffered it as long as I did. Link to comment Share on other sites More sharing options...
ColinB Posted November 27, 2020 Share Posted November 27, 2020 I think someone on here mentioned it when the class 37 TTS decoder got released. I have to do it for all diesel locos except for some reason class 66 ones, even some of the Bachmann ones. Link to comment Share on other sites More sharing options...
Will Hay Posted November 28, 2020 Author Share Posted November 28, 2020 Hi Colin.Why for the Bachmann, is it because you fit a hornby decoder to them because, like me, you don't wanna spend three figures on sound? Link to comment Share on other sites More sharing options...
ColinB Posted November 28, 2020 Share Posted November 28, 2020 Yes exactly, I normally change the connector to 21 pin, I don't use adapters as they usually foul the roof ( I think class 66 is the only one where is doesn't). Some of my models do have the expensive ones and yes they are good but even though I complain about them, TTS decoders are really good value for money. With a decent speaker they sound OK. On the Hattons class 66 you have to fit the expensive ones to get all the light functions. Link to comment Share on other sites More sharing options...
96RAF Posted November 28, 2020 Share Posted November 28, 2020 If you read the TTS leaflet it used to say motor algorithm 2 (i.e. CV150 value = 1) was specifically for Baccy locos, now it says it is a linear curve suited to some Lenz decoders. Algorithm 1 is a non linear curve more suited to Hornby R8249 and similar decoders, hence TTS. Link to comment Share on other sites More sharing options...
ColinB Posted November 28, 2020 Share Posted November 28, 2020 Weird, on the latest Bachmann class 66 I bought (the one in BR blue), I didn't have to change CV150. I have had to do it on virtually every other one. Link to comment Share on other sites More sharing options...
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