I have my dcs hooked up. I am powering it with a radio shack power supply to aux power. I have my ZW-C hooked to both variable channels since most of my stuff is conventional. When I apply power to either track the bell starts ringing on the engine and I can shut it off if I press the bell button, the whistle button on the other hand only speeds up engines and no whistle. on track one is a ps1 fm trainmaster and on the inside is a Williams f3. Any suggestions
thanks
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You're feeding the variable channels with another sawtooth waveform, the resulting waveform must be pretty chopped up. FWIW, I see this issue all the time on my bench with just a Z-1000 controller on the brick. Any chopped waveform will have the possibility of triggering the conventional mode bell or whistle, some are worse than others. Multiple daisy-chained chopped waveforms are a lot more likely to be troublesome.
What is best way to wire it
Since you're using a variable channel to control the conventional locomotive, use a pure sine wave transformer or brick to feed the input of the variable channels.
Can i just wire the lionel brick to the tiu. Or can i run the conventional from fixed voltage
Sure, that's how I run with my TIU. The brick goes on the input, variable voltage comes out the other end on the variable channels. 
do I just cut the plugs off or is there an adapter I can buy
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