Lionel 2466WX Tender hum/buzz

Are you sure you don't have any wires shorting against the metal shell?

Roger

Roger1,  I will be taking another look at it tonight for that.  I will even try turning out the lights to see if something shows up.  Of the six whistling tenders I have, this is the first {and so far only one} doing this.  I will disassemble it again tonight {after the lights out check to see if I am missing a short somewhere} and de-solder the original assembly wiring to see if a wire is shorting out.

Thanks for the lead.

The buzz most likely is coming from the relay.  With the shell off, you probably don't hear it, with the shell on, it sort of acts like a echo chamber and is more noticeable.

Marty

A light hum from the relay is OK, the real test is... how well does it whistle?

I'm going to guess too that you used different transformers to get different results. That make a difference.

ADCX Rob,

No, I hadn't thought about that. But, I will say that my dad's 1033 on the test track has not produced that hum/buzz with any of the other whistle tenders I have.

That being said, I have two other 1033's I will try.

Thanks!

ADCX Rob, I tried the other transformers with no difference.

After removing the relay, I found that it seems lose in the mount.  I can rotate the copper rings/washers where the magnetic is at the bottom. I thought they might be threaded and tried to tighten them with my fingers, but to no avail. there was a 'snug' point that it would reach, so I stopped there, reassembled everything and tried it again. Still whistles great and the hum/buzz is far less noticeable.  I do have another relay I will try in the coming days and make an update.