Whistling Freight Shed Compatibility with KW Transformer

[Teeg]

Hello Everyone:

Just joined the forum after lurking for a while; very impressed with the knowledge here.  I have an issue with a 2126 whistling freight shed that was working fine with an old 4090 transformer, but doesn't like the KW I just purchased and hooked up.  I have the shed set up to operate on an insulated track section; when using the 4090, I had the terminal clip at the back under the shed's roof wired to the number 2 clip on the lockon (with nothing on the number 1 clip) and the front clip under the roof going to the "C" post on the 4090.  It worked find under that arrangement.  With the KW, however, the "C" post does not provide enough voltage to operate the shed, and the "D" post provides 20 volts, which is too much.  I've also tried hooking the shed up to the "A" and "B" terminals on the KW, but that doesn't work right either.  The track wiring is exactly the same as I had it before when it was working with the 4090.  Any suggestions for how I might get this to work with the KW?  

[rrlineman]

the 2 middle posts on the terminal board should be marked 14V between the 2 posts. have you tried that ??

[lionelsoni]

I believe that he's trying to operate the accessory with a control rail, which requires that the accessory voltage share a common with the track voltage.

[ADCX Rob]

rrlineman

the 2 middle posts on the terminal board should be marked 14V between the 2 posts. have you tried that ??

If he does that while using a isolated rail, he's looking at a 6 volt or 20 volt short.

Teeg

With the KW, however, the "C" post does not provide enough voltage to operate the shed, and the "D" post provides 20 volts, which is too much...

That is your only fixed voltage choice with a KW - 6v or 20v - if you are running trains with A-U & B-U.

If the 4090 was connected to the rest of the layout using "U" to the center rail and the common "A" to outside rails, the the 4090 was providing 16v to the whistle. If you run trains with the KW only on A-U, then you can connect the whistle to "B" and set it at 16 volts(or whatever level you wish for satisfactory operation) to duplicate the 4090 setup.