[time-nuts] Cheap LEA-6T [was: Re: Precise Time transfer and relative position over ashort baseline]

[Bob Stewart]

Hi Attila,

The two versions of the -6T I have experience with - LEA-6T-0-001 and LEA-6T-1-000 - have both had a single shield.  So, that implies that these are at least 2 steps older than what's out now.  The price?  They must be getting them at or near single digits USD.  

Bob


--------------------------------------------
On Tue, 4/12/16, Attila Kinali <attila at kinali.ch> wrote:

 Subject: Re: [time-nuts] Cheap LEA-6T [was: Re: Precise Time transfer and relative position over ashort baseline]
 To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
 Date: Tuesday, April 12, 2016, 4:26 PM
 
 On Mon, 11 Apr 2016
 13:47:36 -0500
 Scott Newell <newell+timenuts at n5tnl.com>
 wrote:
 
 > BTW, there are
 some LEA-6T modules (with patch antenna, compass, 1PPS 
 > led, and USB connector) intended for drone
 autopilot use on eBay for 
 > around $30
 shipped from China. (Search for "LEA-6T".) Mine
 showed up 
 > on the day of my lightning
 strike, so I've barely played with it. It 
 > has the 6.something ROM, connects to
 u-center, and appears to output 
 > the
 +/-10 ns sawtooth error correction message and the RTKLIB
 
 > compatible raw data.
 
 There is something strange
 with these. For one thing, they are way too
 cheap. LEA-6T is still quite expensive when
 bought from u-blox directly,
 eventhough it
 came down from 180eur/pcs to 140eur. The prices these
 modules are selling are lower than the cheapest
 price i've ever seen
 for LEA-6T's,
 when bought in the 100s. So, either they bought them in
 swats of 10k or there is something amis...
 
 Also, why would anyone use
 LEA-6T in navigation module? That does
 not
 make sense. The power of the LEA-6T is as a timing module,
 not
 for navigation. 
 
 And last, but not least, the pictures seem
 wrong. All the LEA modules
 i've seen,
 had two shield covers, one over the RF part and one over
 the digital part. Yet these shown in the
 pictures have only a single
 shiled. It might
 be that u-blox decided to use a single shield
 for them... though it would seem strange to do
 that to an already launched
 product that
 sells in relatively low volumes. Even more so, as I know
 that u-blox itself warned users of their
 modules to ensure an electrically
 quite
 enviornment around their modules, for maximum
 performance.
 
 
 So, i would warn people buying those that they
 might be fakes...
 
 
             Attila Kinali
 -- 
 Reading can seriously
 damage your ignorance.
         --
 unknown
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