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Hi and hello to all!

I just tried the process listed in this older forum topic below:

https://ogrforum.ogaugerr.com/t...h-fixed-and-variable

It worked fine, but I noticed when I have it in variable mode there is a low hum coming from the TIU running trains.

When I press the 'FXD' to put it back into fixed mode, again all runs fine just no hum.

Using a lionel powerhouse 180 watt brick for power. The TIU is rev. L.

My question, is the hum normal?

Thanks!

 

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VRF201,

     I have heard of this light hum in the Variable mode using the 180 Lionel Bricks before, however I have no idea what makes it happen & from what I understand,DSCN1691  it does not effect the running of any remote control trains.  Further no such hum happens when using the Z4K or the old ZW or KW Transformers never heard it happening with the new ZW-L either.

PCRR/Dave

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Last edited by Pine Creek Railroad

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