98 mahogany classic very faint piezo

[billy]

Awesome. This is the way.

Watch your heat though- easy to lift a pad.

If it’s not the 1044, I think there is another chip that sometimes whines too. Iirc the 1044 cone in a few varieties but I don’t think this poses a problem.

[Bowen748]

I was able to find what looks like an LTC1044 from a 9volt clock radio at the thrift store.

It didn’t say lct1044 but I tested pins 1 and 4 for 9v and it checked out.

Soldered it in and the squealing sound is gone and I have clean piezo (when I turn down the mags) but the piezo controls are not working.

Swapped my other ribbon with no change.

I’ll have to wait on the mail for a proper LTC1044 to see what the change is.

I’m SOOO happy about this!

#PreampIssues

[vjmanzo]

This is fantastic! Congrats, @Bowen748!

[billy]

Awesome! I think the lt1044 puts out an inverted 9v too

So -9v on one of the pins.

If your piezo still doesn’t work after you get a known good part then I’d check the jack, your cable, etc. via continuity check with your meter.

But I think this was the problem based on your posts.

[Bowen748]

@billy,
Do you know what upper right hand corner numbers mean?

I’m still waiting on the mail.

[billy]

Not sure, the data sheet might tell you if it’s something specific to the chip. Most likely it’s a lot code.

Make sure all your flex cables are fully seated and that they have no broken connections.