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Happy Easter!

Have any of you added a DPDT switch to reverse the polarity of the whistle diode in a Type KW transformer?  I did it this way: http://jwtrains.com/Tech%20Tip_7.htm (note that I think he means DPDT, because the only DPSTs I found have 4 terminals).

I played around with this yesterday, and just hooked everything up with test leads, and it works, but I'm trying to figure out where I can fit the switch in the case.  Seems like the easiest place would be in the back by the binding posts, but it there isn't enough room, at least with the switch I have, without shorting out the binding posts.  I'm looking for ideas.  I do have an external bell & whistle button, but I like the way the transformer whistle controller works, especially after the stud diode upgrade.  Thanks, Chris.

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After some thought, I think I'll "doghouse" it.  I don't want to have to reach in back of  the transformer and blind feel between binding posts to toggle between bell & whistle. I had some time yesterday afternoon, and was able to drill a hole in the back plate just above the power cord.  I ran lamp cord to the rectifier points, and temp'd the toggle switch & stud diode outside of the case.  I just need to find the right project box and mount it to the case.  I'm thinking of mounting it high, on the back (12 o'clock when looking down on the KW).  Thanks for the suggestions.

I think it turned out well.  Found a small project box at the same surplus outfit I got the DPDT switch from.  I used Scotch brand reclosable fastener tape to attach the box to the case.  This will allow easy removal so the case can be removed to service the rollers, circuit breaker, etc.  I tried velcro, but there was too much slop.

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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