TTS Decoder install in Class 67

[John ks]

TTS decoders for my class 67 have arrived a few days ago.

 

Put the first one in an early version Class 67, IE no provision for speaker

It was working fine on Digitrax DCC with a Hattons decoder

 

Fitted the decoder & found a place to mount the speaker

 

 

 

Placed it on the track pressed F1 & the sound came on

 

F2 & the horn sounded, F3 & the other horn sounded, F0 & the lights came on, changed direction & the lights changed accordingly

 

Opened the throttle & it started to move

 

That’s when it refused to obey any more instructions & kept going at it last throttle setting.

 

Power off & on returned it to normal until I opened the throttle again & it again refused to obey any more instructions

 

Disconnected the capacitor next to the motor, no change

 

Then I remembered a post where it was suggested that all inductors & capacitors in the motor circuit should be removed.

I did this & now it is working ok.

 

Red wire from motor goes direct to where L1 was removed, same on the other side with the black wire.

 

 

 

I have a class 43 HST That I fitted with TTS & it had a similar problem.

I fixed it by adding a second decoder for the motor .

I have a look at it soon & see if removing the capacitors & inductors fixes it properly.

 

 

John

[Phil S]

It is easier to remove only the capacitors - since these are ACROSS the 2 motor wires, and not in SERIES as with the inductors - you MIGHT find that is sufficient change - so it is worth trying first.     With some Bachmann Models there is a 3rd capacitor soldered to the motor casing / below the visible part of the motor / connecting to the chassis