Stopping speaker buzz

"Necessity is the Mother of invention" Thanks for posting.

I purchased quite a few Lionel F3's and F7's and have notice a buzz too. Mine was coming from the roof - the metal detail fans rattling in their shrouds.

So I popped the lid off and removed the fans out from the shrouds... Cannot see them anyway...

Thanks, that's interesting to know as someone who's had to grapple with buzzing speakers - mostly on non-Lionel TMCC engines - and also tried various speaker upgrades/replacements to improve sound quality.

It might have been interesting if you'd taken the body shell off to see how the speakers were mounted. In your case it would seem that there was actually a problem with the frame or maybe the rim of the speaker itself vibrating against the shell. I have traced most of my problems to the seal or gasket between the speaker and the frame; if it's not tight, or is broken or out of alignment, at any volume above the low settings the speaker will vibrate against the metal producing an annoying rattle. Alternatively if the speaker has an enclosure that can rattle too if not properly screwed down.

Anyway, glad your noise disappeared after a relatively simple fix.

In addition to something loose in the mount or enclosure sometimes a piece of debris like solder or plastic sprue can find itself next to the cone. Clean it up, tighten it down and you should be good to go. Only when the voice coil loosens up (cheap speakers) do you really have to replace it.

Pete

I've had tacks, screws, washers, or nuts stuck to the cone and held by the magnet.  They make a nasty buzz when the speaker is working, and it's easy to fix.

No more quality control!

Years ago most items bought worked perfectly, as designed, right out of the box.

Today, new cars a few months old have problems, especially new lamps, which are inoperative!

Amazing!!!!

Ralph