Hi Mike,
Try http://ep.espacenet.com/ It's an offical european site that also searches
US and World Patents. Very flexible search options and no registration
required. You do have to type in the code from a graphic image if you want to
download a full PDF. That is a small price to pay to keep t
Back on Jun 11, 2007 I posted a question about an oscillator reference
source I obtained. I didn't get much help then.
It is basically a quality 5 MHz OCXO in a unit that can be locked and
also gives 1 pps.
I've been thinking I should check it out relative to my GPS source and
if it looks go
This seller in CA is selling for $120 or less.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160331810845
John, K1AE 1.8 MHz - 10 GHz.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of dave powis
Sent: Tuesday, June 30, 2009 4:59 PM
The Google patent search is a very useful for studying GPS
technology, precision oscillators, etc. It has been extremely
reliable in the past, but today it started giving an error message
after downloading only 5 patents. The error message is:
Google Error
Forbidden
Hello David,
I'm a complete beginner in this field, but after a lot of reading and
following these threads, I finally bought a Tbolt from China via
e-bay. Arrived in just under a week by post, plugged it in to power
and antenna and got 10 MHz output.
I eventually connected a lap-top PC via a
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com
> Sent: Tuesday, June 30, 2009 2:48 PM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Plug and play GPSDOs was:(no subject)
>
> -
> Something like thi
In a message dated 30/06/2009 22:38:35 GMT Daylight Time,
james.p@jpl.nasa.gov writes:
Even better would be some ambitious amateur programming one of the little
LCD+microcontroller widgets to make a display. Probably not worth it,
dollar wise, but might be nice, especially for a fiel
The main reason for manually doing the self-survey and saving the results is so
that the unit won't spend hours doing it every time it powers up. It's a one
time thing and well worth the trouble.
Every foot of position error can introduce a nanosecond of offset in the timing
results. Probab
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
> Sent: Tuesday, June 30, 2009 2:32 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] Plug and play GPSDOs was:(no subject)
>
>
> Yes, you can just leave the unit runnin
Yes, you can just leave the unit running without much problem, but what works
really well is to use an old laptop as a permanent monitoring device. You can
get them for around 20 bucks... Lady Heather was created for Thunderbolt just
such a situation. Much more entertaining and informativ
>
> There is one thing that make most GPSDOs not quite plug and play... that
> is their need to know their location rather precisely.
Yes, it's helpful on the way to perfection. Is it a requirement for the
OPs level of ambition? I think not.
I wonder if the long self-survey procedure is an artif
Hi David,
I don't know the Chinese ones, but I was lucky enough to get one of the TAPR
offer TBolts - and it really was P&P - yes, I attached a PC and used the TBolt
monitoring utility to confirm it was all working OK, but that was all. It now
sits in my shack outputing 10MHz very nicely.
73,
eBay. 12 bucks for 4 including shipping :)
-Bob
On Tue, Jun 30, 2009 at 12:17 PM, Lester Veenstra wrote:
> I suggest you try The RF Connection for adapters:
>
>
> NM/FF
> N(M)/F(F)
> 3.00
>
> http://therfc.com/
>
> Lester B Veenstra MØYCM K1YCM
> les...@veenstras.com
> m0...@veenstras.com
> k1
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of John Ackermann N8UR
> Sent: Tuesday, June 30, 2009 11:40 AM
> To: les...@veenstras.com; Discussion of precise time and
> frequency measurement
> Subject: Re: [time-nuts] Plug and pl
For really good adapters, I've had good luck with S.M. Electronics
(http://www.smelectronicsllc.com). They are pricey -- like $24-$36 each
for 18 GHz stainless N-to-something adapters, but I think on the whole
cheaper than Pasternack, and they often stock several grades (with
specified frequen
I suggest you try The RF Connection for adapters:
NM/FF
N(M)/F(F)
3.00
http://therfc.com/
Lester B Veenstra MØYCM K1YCM
les...@veenstras.com
m0...@veenstras.com
k1...@veenstras.com
US Postal Address:
PSC 45 Box 781
APO AE 09468 USA
UK Postal Address:
Dawn Cottage
Norwood, Harrogate
H
> I am not very much interested in how it is achieved, but wonder if a
> 10MHz oscillator locked to GPS is now available as "plug&play" rather
> than needing a lot of time/effort/building.
> I note the Thunderbolt units available from the Far East on ebay
> for~£80gbp. Are these really P&P - that
I have my equipment attached to a rather large (100+ pounds) UPS device in
case of a power outage. It'll run a Thunderbolt for a week I'd suspect.
I've purchased several items from fluke.l (that's an L not a one) on eBay
with good results every time. The only "problem" I ever had was just this
w
Many thanks Mark.
I was thinking of setting up in a fixed position and leaving on
permanently. But then if there's a power cut?
Do you know if the China supplier is OK? Or any source in the UK of
Thunderbolt?
David
>>> Mark Sims 30/06/09 17:48 >>>
There is one thing that make most GPSDOs not
There is one thing that make most GPSDOs not quite plug and play... that is
their need to know their location rather precisely. They do this with a "self
survey" mechanism. The self survey can take several hours. Most units can
trigger this automatically if their location changes more than
I'm sorting through the junk I have been bringing home
and have a Spectracom 1961 w/o its antenna, and it does
blows its fuse when plugged in.
-pete
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> Message: 3
> Date: Tue, 30 Jun 2009 00:20:50 +0200
> From: Alberto di Bene
> Subject: Re: [time-nuts] GPSDO project (SDR)
> To: Discussion of precise time and frequency measurement
>
> Message-ID: <4a493e42.4010...@usa.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
The Z3816A and Z3801A are plug and play with 4 LED status lights on the
front panel including GPS Lock. I have the Thunderbolt and a Z3816A and
find being able to review the information on the computer is very helpful
including looking for satellite tracking loss, open or shorter antenna
connectio
Yes the Thunderbold truly is plug and play. In holdover of course the Rb
will be more stable ...
The RS-232 connection also lets you see if it has achieved GPS lock - you
can't tell without something that talks to the RS-232 interface.
Dave
-Original Message-
From: time-nuts-boun...@fe
I am not very much interested in how it is achieved, but wonder if a
10MHz oscillator locked to GPS is now available as "plug&play" rather
than needing a lot of time/effort/building.
I note the Thunderbolt units available from the Far East on ebay
for~£80gbp. Are these really P&P - that is, just c
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