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HO-Scale Drop-In Decoder Comparison
DCC Compatibility
 
 

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Comparison of HO-scale drop-in decoders - listed from left to right by manufacturer, and then in order of price.
Manufacturer Digitrax
NCE
TCS
Decoder DH165A0 DH165K0 ATLS4 SW9-SR DA-SR A1
Features/For Atlas Kato Atlas S1, S2, S3, S4 SW9 Atlas Atlas
MSRP
$29.99
$33.99
$29.95  $29.95  $29.95 $24.99
Loy's Price (1-4)
$24.00
$28.00
$24.00 $24.00 $24.00 $20.00
Loy's Price (5+ mix & match) $22.00 $26.00 $22.00 $23.00 $23.00 $19.00
Length 2.9" 2.9" 3.75" 1.95" 2.85" 2.9"
Width 0.65" 0.65" 0.97" 0.83" 0.66" 0.65"
Thickness 0.14" 0.14" 0.218" 0.12" 0.125" 0.165"
Amperage 1.5 A 1.5 A 1.3 A 1.3 A 1.3 A 1.3 A
Stall Current - - 2 A 2 A 2 A 2 A
Peak Current 2 A 2 A 2 A 2 A 2 A 2 A
Addressing 2/4 2/4 2/4 2/4 2/4 2/4
Speed Steps All All 28/128 28/128 28/128 All
User Table Steps All All 28/128 28/128 28/128 All
Base Direction Yes Yes Yes Yes Yes Yes
Momentum Yes Yes Yes Yes Yes Yes
V-Start - Steps All All 28/128 28/128 28/128 All
V-Mid - Steps All All 28/128 28/128 28/128 All
V-Max - Steps All All 28/128 28/128 28/128 All
Functions 6 6 4 4 4 4
Function Current, mA 500 500 100 (1) 100 (1) 100 (1) 100
Directional Lighting Yes Yes Yes Yes Yes Yes
Non-Directional Lighting Yes Yes Yes Yes Yes Yes
FX Lighting Yes Yes Yes Yes Yes Yes
Decoder-Assisted Consisting Yes Yes Yes Yes Yes Yes
DAC Functions Yes Yes Yes Yes Yes Yes
DAC Momentum Yes Yes Yes Yes Yes No
DC Analog Yes Yes Yes Yes Yes Yes
DC Functions Yes Yes No No No No
DC Brake Control Yes Yes - - - Yes
Programming All All All All All All
OPS-Mode Programming Yes Yes Yes Yes Yes Yes
OPS-Mode Read Yes Yes No No No No
Short-Circuit Protection Yes Yes No No No No
Thermal Protection Yes Yes No No No No
Quiet/Silent/SuperSonic Drive Yes Yes Yes Yes Yes Yes
PWM Adjust No No Yes Yes Yes No (2)

Forward/Reverse Trims

Yes Yes No No No No
Kick Start Yes Yes Yes (4) Yes (4) Yes (4) Yes (4)
Function Remapping Yes Yes Yes Yes Yes Yes
CV Reset Yes Yes No No No Yes
Dither (5) No No No No No Yes
Torque Compensation Yes Yes No No No Yes
Back-EMF Yes Yes No No No No
Transponding Yes Yes No No No No
Switching Speed Yes Yes No No No No
Master Switch Yes Yes No No No No
Decoder DH165A0 DH165K0 ATLS4 SW9-SR DA-SR A1

1. 100 mA for non-incandescent bulbs, 40 mA for incandescent bulbs, with a maximum of 300 mA for all functions on all outputs.
2. This decoder doesn't have PWM adjustments per se, but the PWM frequency is modified when Dither is used.
3. Advertised as having this feature, but it is flawed so it really doesn't.
4. Works with built-in speed curve as well as the User-Loadable Speed Table
5. Dither is a form of torque compensation unique to Train Control Systems.

Click here to see a collage of HO-scale decoders.
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