开云体育

The common PCM1808 module seems to have a high DOA rate also.?

I am one of the T41 builders and have had 3 out of 5 DOA. Maybe the manufacturer isn’t doing a great job testing, or the baddies are slipping out of the factory floor sweeps.?

Larry

KB3CUF?

On Wed, Jul 10, 2024 at 9:20?PM Kaufman, Matt - N3AR via <matt.d.kaufman=[email protected]> wrote:

I know that Hans is a (super) busy dude, but this really seems like something that he should want to dig into; the abnormally high number of "it must be this IC" has gotten?to the point where now, people are just assuming the chip went bad when things don't work and being right in their assumption.? Anecdotally, this seems like a platform issue of some sort since this one component seems to be such a common failure point.

73

-- Matt N3AR

On Wed, Jul 10, 2024 at 6:15?PM Michael N2ZDB via <n2zdb.radio=[email protected]> wrote:

OK so the problem was a defective (maybe counterfeit?) PCM1804 IC.
Once this part was replaced (after purchasing from Mouser.Com) my receiver sprung to life:)

I am lucky I have the skills to replace this part myself.

The initial symptoms were once the QMX+ was turned on - I heard some noise that quickly faded out within a few seconds.
I figured from the beginning that I had a defective IC after hearing others with the same problems.

73's Michael N2ZDB