I've been adding decoders to some of my (new) older model Proto 2000 engines mostly GP7's to start with, While everything has worked out I have not been able to get a couple of them to run at setting 1 or 2 the same speed in reverse as forward. The problem seems to be faster speed in reverse. Any suggestions? I'm installing Digitrax DH123PS decoders and my system is a NCE. One other thing on changing the bulbs I've been using Miniatronics 18-14-10 (14 Volt 2.4 MM diameter. They seem to work fine but the physical size is less than 1/2 of the lamps that come from mfg in these engines. Anybody use a lamp that closer to the original in size that may have a part number. Thanks Bill
Bill,
Why don't you use an LED instead of an incandescent for your headlight? LEDs have the following advantages:
The only thing you need to add is a 1K resistor. For your GP7, a 3mm Miniatronics YeloGlo White LED works quite well. The stiff leads coming off of them can help aid in positioning them in place.
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
Bill.
You will have to adjust CV2 the start voltage and then adjust CV66 and CV95 which is the forward and reverse trim CVs. If the loco runs right in the forward direction but too fast in reverse then adjust CV95 to a lower number. If it runs in reverse but not forward then adjust CV66 to a higher number.
As for the lighting situation. I have been doing LED conversions to all my locos when a bulb melted a shell on a prized super detailed and custom painted RS1 of mine. I even put LEDs in the brass locos I instal decoders in. Bulbs and factory lighting boards get ripped out before a decoder goes in.
Pete
I pray every day I break even, Cause I can really use the money!
I started with nothing and still have most of it left!
Forward and revervse trims ONLY work with the speed tables, not Vmin/mid/max.When setting your speeds you only need to be close not perfect. Once a train is being pulled it will even out.
From Digitrax:
Forward trim: a scaling factor applied to all speed step power values in a speed table for the forward direction of the loco.
Reverse trim: a scaling factor applied to all speed step values in a speed table for a loco moving in the reverse direction.
Peter