This article is from the Model Trains FAQ, by Christopher D Coleman with numerous contributions by others.
A basic review of higher wattage available power:
Lionel Transformers
MultiVolt (no circuit breaker)
A: 40W 60Hz 1921-33
L: 50W 60Hz 1934-38
N: 50W 60Hz 1942
A: 60W 60Hz 1934
B: 75W 60Hz 1918-38
T: 100W 60Hz 1923-38
T: 110W 60Hz 1922
T: 150W 60Hz 1918-21
K: 150W 60Hz 1922-38
K: 200W 60Hz 1918-21
F: 40W 25-40Hz 1931-37
C: 75W 25-40Hz 1922-37
H: 75W 25Hz 1938-39
J: ?? 40-133Hz ??
TrainMaster (circuit breaker)
1034:75W 60Hz 1948-54
1044:75W 60Hz 1957-69
W: 75W 60Hz 1939-42
Q: 75W 60Hz 1939-46 single control
A: 90W 60Hz 1947-48
R: 100W 60Hz 1939-47 two controls
RX: 100W 25Hz one control
V: 150W 60Hz 1939-47 four controls, fixed voltage terminals
Z: 250W 60Hz 1939-47 four controls
MultiControl (Circuit breaker, Whistle and Direction) (may also say TrainMaster)
1032: 75W 60Hz 1948
1032M: 75W 50Hz
1232: 75W 50-60Hz
S: 80W 60Hz 1947
1033: 90W 60Hz 1948-56 single control with fixed voltage
1044: 90W 60Hz 1957-69 single control with fixed voltage
6-4090: 90W 60Hz 1970-84 identical to 1044
RW,RWM:110W 60Hz 1948-59 single control with fixed voltage
LW: 125W 60Hz 1955-56 single control with fixed voltage, replaced RW
SW: 130W 60Hz 1961-66 dual control, single whistle,
TW: 175W 60Hz 1953-60 single control
KW: 190W 60Hz 1950-65 dual control with fixed voltages, troublesome circuit breaker
VW: 150W 60Hz 1948-49 looks like ZW
ZW: 250W 60Hz 1948-49 four variable controls, two with direction and whistle
ZW: 275W 60Hz 1950-66 four variable controls, two with direction and whistle
Solid State (circuit breaker, whistle/horn, direction, power switch)
6-4690 see MW
MW: ??? 60Hz 1986-89 dual control
6-12780 see RS-1
RS-1: 50W 60Hz 1990-93 dual control, railsounds, replaced MW
TrainMaster System: see below description
AMERICAN FLYER POSTWAR
4B/22034: 100/110W, single control, circuit breaker
8B: 100W, single control, manual circuit breaker
9B: 150W, dual control, manual circuit breaker
12B: 250W, dual control, manual circuit breaker, power switch
14: 150W DC, single control
15B/22040: 110W, single control, circuit breaker
16: 150W DC, single control
16B/22050: 175W,: single control, circuit breaker, power switch
17B: 190W, single control, circuit breaker, V and A meters
18B/22060: 175/190W, dual control, circuit breaker, power switch
19B/22070: 300W, single control, V and A meters, power switch
30B/22080: 300W, dual control, dual V meters, dual circuit breakers, power switch
22090: 350W, dual control, dual V meters, dual circuit breakers
OTHER MAKERS
MRC Trainpower O-27: single control, direction and whistle,
power switch, solid state
MRC Dualpower O-27: 80VA, dual control, dual direction and
whistle, power switch, solid state
ROW Power Supply: 400VA, dual control, bell/whistle, dual V
and A meters, power switch
No particular problems have been experienced with these
transformers unless so noted above.
Most Lionel transformers made after 1939 are designated
"TrainMaster" and have circuit breakers. Previous tosthis they
were called "Multivolt" and had no circuit breaker. Because of
this caution should be used withsMultivolt transformers.
 
Continue to: