Hi
Based on the dates I’ve seen on pictures and boards, this is a *very* new
project. I suspect that what we are looking at is approximately beta test
software. There’s likely to be a good part of a year or more spent optimizing
the code. There’s no shame in any of that. It’s the nature of
Hi
One of my friend had one. Here is the test result from him.
Bob Camp kb...@n1k.org于2014年12月29日星期一写道：
Hi
Ok, well that’s a move forward on this GPSDO. There is a *lot* more data
on that listing than there was a month ago.
Thanks for digging it up and posting the link.
If you look at
Hi
On Dec 29, 2014, at 8:51 PM, Li Ang lll...@gmail.com wrote:
Hi
One of my friend had one. Here is the test result from him.
Ok, that data is actually more encouraging than the data on the selling site.
He ran it long enough to get past the hump in the ADEV curve at 4,000 seconds.
: Re: [time-nuts] New GPSDO on EBAY From China
Hi
On Dec 29, 2014, at 8:51 PM, Li Ang lll...@gmail.com wrote:
Hi
One of my friend had one. Here is the test result from him.
Ok, that data is actually more encouraging than the data on the selling site.
He ran it long enough
Li Ang wrote:
This unit is done by BG7TBL. In his store on taobao.com,
there is a adev chart. Please refrer to this link
That ADEV chart (see below) raises more questions than it
answers. At least the time constant is not too short (a very common
problem with DIY GPSDOs). But when the GPS
I remember seeing this same unit here on this list some weeks ago. As I
remember it is built from some plans that were published. You can see
that it uses a surplus OCXO. The seller is good to claim the specs of his
GPSDO as being two orders of magnitude above the OCXO. because we don't
know
The OCXO is a Morion (Russia) MV89A. You may download a datasheet
from http://www.morion.com.ru/catalog_pdf/MV89-OCXO.pdf
Looks decent, stability vs. temperature and aging are as usual.
BG7TBL is a Chinese radioamateur, quite known for his designs.
73 - Marco IK1ODO
Hi
Ok, well that’s a move forward on this GPSDO. There is a *lot* more data on
that listing than there was a month ago.
Thanks for digging it up and posting the link.
If you look at the ADEV at 1 second, it’s running at 2.67 x10^-11. That’s all
coming from the Erratum Rb that they are using
You have to give the guy credit for trying.
What is a shame here is that he did not
publish the schematics and the source code.
If anyone knows him he should just ask him. We tend to
be sceptics here but that's the nature of the game.
However, I don't want anyone to think that we are elitist.
I
Hi Dave,
Bite the bullet and spring for the Lucent pair on Ebay - $150 , new, and the
pair work fine. Lots of info on the list about them.
73,
Bill, WA2DVU
Cape May
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of David Smith
Sent: Sunday, December
On 12/28/2014 7:25 AM, David Smith wrote:
Hello Friends,
I found this new inexpensive GPSDO on ebay listed from a seller from China:
Dave, these have been discussed in the past at some length on this
list. I would point out that they use a re-cycled Morion OCXO. I have
had two of these ovens
Hi
This unit is done by BG7TBL. In his store on taobao.com, there is a adev
chart. Please refrer to this link
http://item.taobao.com/item.htm?spm=a1z10.3.w4002-1278071728.49.XHJlQLid=42336500072
2014-12-29 1:56 GMT+08:00 Dan Rae dan...@verizon.net:
On 12/28/2014 7:25 AM, David Smith
Hi
Quick summary if you don’t want to go back a month or two in the archives:
1) They appear to be a club project done by a ham club in China.
2) There are multiple versions in the pictures, some with more jumpers, some
with fewer jumpers.
3) The design appears to be pretty new. Dates are all
Dave wrote:
I found this new inexpensive GPSDO on ebay listed from a seller from China:
It looks interesting and tempting BUT the seller doesn't give
any spec's on the unit or osc type. The seller has 10 negative and
18 neutral feedback's in the past 6 months out of a total of 2110
for
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