On Thu, 1 Feb 2024 20:24:27 -0500, Jim Unroe <rock.un...@gmail.com> wrote:

> On Thu, Feb 1, 2024 at 6:24 PM <d...@deutrino.net> wrote:
> >
> > Hello again,
> >
> > I obtained a pair of brand new Baofeng UV-9R Pro units a few months ago and 
> > promptly flashed one with CHIRP.
> >
> > Unfortunately it seems that flashing the unit causes some kind of strange 
> > problem with squelch. I've seen this referenced a few times elsewhere when 
> > searching the problem, forum posts, Amazon reviews etc, though I don't know 
> > if this happens with all units or just some (and would love to hear info 
> > from anyone who's flashed them).
> >
> > Observations, hopefully somewhat accurate:
> >
> > 1. After flashing the radio with CHIRP, when it is tuned to a continuous 
> > channel such as NOAA weather radio, the squelch cuts in and out so badly 
> > that the radio is more or less unusable.
> >
> > 2. The radio, before flashing, and after factory reset, reliably receives 
> > the same channel without squelch problems when placed in the same location, 
> > which indicates that the problem is not one of low signal or interference.
> >
> > 3. Setting the squelch to 0 in the menu does not have a positive effect on 
> > the problem.
> >
> > 4. The squelch problem can be temporarily "cured" by pressing one of the 
> > buttons, e.g. the menu button. At this point, the squelch will perform 
> > normally for several seconds before going back to the broken behavior, in 
> > the case of the menu button, possibly when the button press "times out".
> >
> > Has anyone else noticed this or know of a fix or workaround?
> >
> > I am happy to assist debugging if desired. Just trying to see if there is 
> > anything I've missed before opening an issue.
> >
> > Thanks-
> 
> Unfortunately Baofeng made changes last year to the majority of their
> radios with 128 channels that made them incompatible with CHIRP. It
> took a lot of time, money, downloading from a lot of radios and
> staring at a lot of image files to figure out what had changed. Then
> it took quite a bit of time to develop a suitable workaround for the
> issue. So there could be a couple of things that happened.
> 
> 1. If you uploaded an image from a radio other than the one you were
> programming (let's call it a 'foreign' image), then due to the
> changes, the uploaded image may have been incompatible with the radio
> that it was uploaded to.

I did indeed initially create the file for the UV-9R Pro channel scheme by 
duplicating a .img file that had been made for a UV-5R, is this what you mean?

> 2. If you used and version of CHIRP-next that was not yet updated to
> handle the changes that Baofeng made to these radios and your radio
> has the 'dropped byte' issue (the debug.log will say if your radio has
> this issue), then you image can have dropped bytes in the Aux memory
> area and/or have some or all of Aux memory set to 0xFF values. The
> driver for these 'waterproof' models was the last to get updated.

Initial programming likely happened in July of last year. Sounds like this 
might also be the case!

> Either of these issues can cause squelch problems or other side effects.

Found an issue describing the same problem with the BF-F8HP,

https://chirp.danplanet.com/issues/8257

> My suggestion would be to open a ticket.

I will do that, thank you! :)

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