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GE/Freightliner class 70 sound decoder and speaker (21)


The class 70 loco has a unique random sound which has been captured on this decoder and is prototypically heard at random. The sound is that of the ‘Skip Fire’ which is a computerised engine self-checking system; being computer controlled this feature cuts in at random on the real loco when both stationary or in motion. This is only operational in stationary mode on this decoder due to the limitations of the sound decoder. Other random sounds include the sound of the air release dump valve followed by the compressor cutting-in and the random sound of the sander which is operational when the loco is in motion. All these features help to make your DCC class 70 model interesting to operate.
Due to the restricted space inside the Bachmann class 70 it may benefit by fitting the rectangular, 20 x 40mm speaker, reference 50334.


Below is a list of the Function keys and their assignments applicable to this model.
F0. Lights on /off
F1. Sound on/off
F2. Horn 1, double
F3. Horn 2, triple
F4. Horn 3, short quieter triple
F5. Buffer up
F6. Coupling up
F7. Track/sleeper ‘groan’
F8. Flange squeal
F9. Rail joint noise for 3-axle bogie
F10. Dynamic brake
F11. Notch up/down
F12. Fade sound up/down
F13. Shunt mode
F14. Acceleration/deceleration override
F15. Aux 1 – cab light


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