Marklin 37994

37994 - Steam locomotive with a tender

Union Pacific Railroad (UP) class 4000 “Big Boy” heavy freight locomotive. Version with the road number 4019 as equipped with smoke deflectors. In the winter of 1944/45 this unit had smoke deflectors installed on it as an experiment.

Length 465mm

Road Number

4019

Spare Parts

Contact shoe - E138079

Rubber tyres (4) - 7153

High efficiency motor -

Light bulb -

Smoke generator - 7226 x 2

Catalogues

Marklin “New Items” brochure 2012

Digital Conversion

High efficiency motor -

Decoder - ESU Loksound 5

Decoder CV Values

Set by us.

CV	Value	Designation	Notes
CV 1	50	Address
CV 17	223	Long Address 1
CV 18	58	Long Address 2
CV 29	54	Configuration Register	128 speed steps, enable analogue, Speed curve CV 67 - 94, Long Address
CV 50	1	Analogue mode	AC analogue enabled
CV 113	255	Power Fail Bypass
CV 263	128	Special function CV1 Front Light	Set for LED
CV 271	128	Special function CV1 Rear Light	Set for LED
CV 275	1	Mode Select Aux 1	Set for Relay for smoke generator
CV 278	31	Brightness Aux 1	Set for Relay

ESU Lokpilot recommendations

CV	Value	Designation	Notes
CV 2	3	Start Voltage
CV 9	20	Motor PWM Frequency (x1000Hz)
CV 51	20	«K Slow» Cutoff
CV 52	20	BEMF «K Slow»
CV 53	110	Control Reference Voltage
CV 54	25	Load Control Parameter «K»
CV 55	200	Load Control Parameter «I»
CV 56	255	BEMF Influence at VMin
CV 116	100	Slow speed BEMF Sampling period	x0.1 millisecond
CV 117	150	Full speed BEMF Sampling period	x0.1 millisecond
CV 118	20	Slow speed BEMF Measurement gap length VMin	x0.1 millisecond
CV 119	25	Full speed BEMF Measurement gap length Vmax	x0.1 millisecond

Serial Number

DCC-EX Roster

ROSTER(7994 , “Marklin 37994”, “Light/Smoke/Cab Light/Shunting/Momentum/ / / /Sound/ / /”)

Train Stuff

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