“Chirping” speaker on FA-2 ABA setup

@Vernon Barry posted:

You have it turned up max volume- gee, you think maybe  something metal vibrating on the train from that level of volume hitting a resonant sound?

has nothing to do with controls or buying a 990 set.

Thanks for the reply!  this is at half volume as mentioned in the post, the phone is just close to the locomotive.  I was thinking the same thing regarding resonant frequency.  I have tried putting my fingers on metal parts and the loco to absorb this, but to no success. it seems to be coming from the speaker but don’t want to take apart the loco without getting thoughts.

Sorry, this right here just is my frustration with Modern recent (last 2-3 years) Lionel. The brag is- buy big L because of great support and warranty. Meanwhile, back in reality- yeah, probably going to need to use that "great support" and warranty.

Again, imagine selling an engine to a customer at a local shop. Next day the customer shows up angry about sounds, or screws falling out, or bad smoke fan, and sure even if your shop can repair it- you shouldn't because any and all warranty work has to go back to Concord.

How meany threads in just the last couple of hours today here in this forum are about a big L product- that likely should be going back to Concord one of a dozen common reasons...

Its the metal side venting vibrating,  its very loose and vibrates. I have the NYC fa's. Try lowering horn volume In app, every new Lionel diesel is so loud it vibrates the shell and causes unwanted sounds, I lower the prime mover sound also.

@tom21pa posted:

Its the metal side venting vibrating,  its very loose and vibrates. I have the NYC fa's. Try lowering horn volume In app, every new Lionel diesel is so loud it vibrates the shell and causes unwanted sounds, I lower the prime mover sound also.

Thanks.  While I had tried quieting rattles in various places I went back to try this again.   I may open them up to see if ai can find a solution using foam tape, etc.  Will post if I identify an easy fix.

Happy New Year!

-Roger

I don’t hear any chirping that you are discussing.

I can't hear it either.

@OKHIKER posted:

I can't hear it either.

Interesting…it is super loud to me and my son (could be the speakers we listen with as the pitch is very high).  

regardless, after a long time messing around with it, this is what I found.

I tried holding all of the different pieces while the horn sounds. I finally got my son to help and if we hold the functional doors in as the train horn blows the sound almost entirely disappears.  Curious, but this suggests a resonance/rattle issue as suggested by Vernon and Tom.  I might try to take off the shell of the Superbass unit and see if I can quiet it down somehow.  If I’m successful I’ll post a video.

Thanks all!

-Roger OverNOut

The sound only comes when the horn changes pitch to the dual horns. I could hear it in the video.

Just didn't know the source without being there.

Some things only sound off when the resonance matches up.

It only happens twice for a second each time.

A bad voice coil sounds nearly the same.

You might try localizing it using only one unit, makes it a lot easier to hear what's happening.

@Roger OverNOut posted:

Interesting…it is super loud to me and my son (could be the speakers we listen with as the pitch is very high).  

regardless, after a long time messing around with it, this is what I found.

I tried holding all of the different pieces while the horn sounds. I finally got my son to help and if we hold the functional doors in as the train horn blows the sound almost entirely disappears.  Curious, but this suggests a resonance/rattle issue as suggested by Vernon and Tom.  I might try to take off the shell of the Superbass unit and see if I can quiet it down somehow.  If I’m successful I’ll post a video.

Thanks all!

-Roger OverNOut

might have to tape the doors shut from inside or like you suggested already, use foam tape.

I imagine the superbass unit should make it worse! Even though it's a shrill, higher pitched sound.

I have some brass tenders for steam engines that do this when sound is added to a unit that didn't have sound. some have a piece of rubber as a lining.