[time-nuts] Ebay Huawei Ublox M8T Modules Warning

[Bob kb8tq]

HI

Looking a bit more closely at the remains of the “chopped up” boards with the M8T’s on them …
This board is *not* the source of those devices. What’s left of the marking on those boards
does not line up with what’s on these (now sold out) boards.

There seems to be at least one switching regulator on this board, a CPU (with JTAG programming 
connector ??),  and a fairly elaborate antenna bias / protection circuit. No idea what might be on the 
back of the board. 

With any luck, they will get more of these in stock. 

Bob

> On Jan 9, 2021, at 10:20 PM, Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> Just for the sake of listing all the variations:
> 
> https://www.ebay.com/itm/ON-SALE-U-BLOX-ublox-LEA-M8T-0-10-HUAWEI-GPS-Timing-Module-Board/333778776570?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 <https://www.ebay.com/itm/ON-SALE-U-BLOX-ublox-LEA-M8T-0-10-HUAWEI-GPS-Timing-Module-Board/333778776570?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649>
> 
> Is the M8T on what I would *guess* is the original board. Simply from looking at the picture I think 
> you can guess pretty well what’s what on the board.  
> 
> Hint: If you buy quite a few …. errr … 10 … there s a pretty good chance that something more than 
> 20% might get knocked off the price …. I bought a pretty large pile of stuff so it’s not clear if that 
> had some impact on what offers got accepted …..
> 
> If that’s not your favorite RF connector on the board, there are SMA’s that likely fit in the same footprint.
> 
> Bob
> 
>> On Jan 9, 2021, at 6:41 PM, Nigel gm8pzr via time-nuts <time-nuts at lists.febo.com <mailto:time-nuts at lists.febo.com>> wrote:
>> 
>> Hmmmm
>> 
>> 
>> 
>> was kinda thinking that might be the case, perhaps time to hope they weren't tested after all!
>> 
>> 
>> 
>> Late here, will check tomorrow
>> 
>> 
>> 
>> Nigel GM8PZR
>> 
>> 
>> 
>> Hi
>> 
>> The “normal chips” that should be inside the module all have something like a 3.6V max supply rating on them.
>> 
>> I would guess that 5V will melt a goodly number of them. 
>> 
>> Bob
>> 
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