Hi Ed,
Have a look in The Art of Electronics by Horrowitz Hill (if you don't hav a
copy, you should! or try the local libary). It has a nice circuit for this
(Actually a telescope drive IIRC) type of application.
Robert G8RPI.
From: Ed Mersich
robert8...@yahoo.co.uk said:
Have a look in The Art of Electronics by Horrowitz Hill (if you don't
hav a copy, you should! or try the local libary). It has a nice circuit for
this (Actually a telescope drive IIRC) type of application.
Rats. I can't find my copy.
I think the trick is that
OK, thank you. I'll collect the documentation you suggest to study it. Yes,
the PRS10 manual available online has no schematic. The paper one does
have. Does this means that Stanford Research want it not to be disseminated?
On Mon, Apr 2, 2012 at 5:06 AM, Said Jackson saidj...@aol.com wrote:
Hi
On 2 April 2012 00:54, Jim Lux jim...@earthlink.net wrote:
On 4/1/12 2:25 PM, Dr. David Kirkby wrote:
So it tells us nothing very much about the life of them in normal use,
with a human mating and demating them. - or even the repeatability of
the reflection coefficient with a human in the
The PRS10 schematics are available on line from Didier.
See the following link:
http://www.ko4bb.com/manuals/index.php?dir=05%29_GPS_Timing/SRS
Sincerely,
Stijn
Op 02-04-12 09:48, Azelio Boriani schreef:
OK, thank you. I'll collect the documentation you suggest to study it. Yes,
the PRS10
Oh, well, I have the original PRS10 manual as we (that is, the company)
bought a new PRS10 one month ago. I was enquiring wether or not it can be
scanned and sent to you. Now it no longer matters.
On Mon, Apr 2, 2012 at 11:35 AM, Stijn Nestra st...@pe1rks.nl wrote:
The PRS10 schematics are
On 4/2/12 12:19 AM, Hal Murray wrote:
robert8...@yahoo.co.uk said:
Have a look in The Art of Electronics by Horrowitz Hill (if you don't
hav a copy, you should! or try the local libary). It has a nice circuit for
this (Actually a telescope drive IIRC) type of application.
Rats. I can't
If the FTL neutrino discovery had been kept quiet until fully vetted, he
probably would not have had to resign.
Compare with the discovery of Cold Fusion. The desire for PR got ahead
of the science.
In my view, somebody who is in responsible charge of any project that size
morally ought to be
Hi,
Note that there should soon be a LEA6T eval board available from sysmocom
http://laforge.gnumonks.org/weblog/2012/03/16/#20120316-osmo_lea6t_gps_timing
Estimated price is 90 EUR excl VAT in the EU.
Cheers,
Sylvain
___
time-nuts mailing list
Note that there should soon be a LEA6T eval board available from sysmocom
http://laforge.gnumonks.org/weblog/2012/03/16/#20120316-osmo_lea6t_gps_timing
Estimated price is 90 EUR excl VAT in the EU.
Anyone know if these will have the RAW output for use with RTKLib? Also assume
can
I see that the board has the serial port and the USB, so you have the
complete I/O suite available.
On Mon, Apr 2, 2012 at 10:11 PM, lstosk...@cox.net wrote:
Note that there should soon be a LEA6T eval board available from sysmocom
On 2 Apr, 2012, at 13:11 , lstosk...@cox.net lstosk...@cox.net wrote:
Note that there should soon be a LEA6T eval board available from sysmocom
http://laforge.gnumonks.org/weblog/2012/03/16/#20120316-osmo_lea6t_gps_timing
Estimated price is 90 EUR excl VAT in the EU.
Anyone know if
Hi guys,
I have asked this question several times over the past few weeks and get no
answer. Have I been ostracized??!!
Question is that I am looking for suggestions for GPS antenna for t-bolt.
The antenna that I am using now is a no name and I not know where it came
from! Wonder if a Garman
I found these at a local surplus shop. $15 each. It worked on the
Starloc. I got the 240 version which has high gain. The Starloc is a bit
deaf. So to pick an antenna for the Tbolt, it should meet gain
requirements and voltage. Marine grade is kind of overkill. Potentially
the marine grade
On 04/02/2012 02:33 AM, ewkeh...@aol.com wrote:
Magnus
I am systematically checking every thing. Power is every where, get a very
strong 60 MHz with the 5.3125 clearly visible on the spectrum analyzer also
counted both with a counter, checked the 85 Hz modulation on the tuning
diode, is a
The booster amps used for satellite dishes work on GPS as well.
I used one when I was feeding two Thunderbolts thru a splitter.
On 04/02/2012 03:28 PM, Bob Martin wrote:
Bill--
The Thunderbolt wants a higher gain antenna than most standard GPS receivers.
I tried standard Garmin active
Here is the antenna I purchased from Ebay (China). This is a Lucent 40dB timing
antenna that should work
for any GPS receiver. Mine took about 2 weeks to get here and there were no
problems getting it. This unit
is currently available for 'buy it now at $28 dollars.
On Mon, Apr 2, 2012 at 3:28 PM, Bob Martin k6...@comcast.net wrote:
Bill--
The Thunderbolt wants a higher gain antenna than most standard GPS receivers.
I tried standard Garmin active antennas, and while they worked (I have a
good view of the sky), signal levels could be better.
Best
All gone .. I got one. I'm happy for $26 but the thing was pretty
badly treated in its life and the seal did not
look well. If yours is as knocked around I'd suggest pulling it apart
and use a bit of sealer (RTV etc)
Now to come up with a mount, they are more rare and usually go for
more then the
On Mon, Apr 2, 2012 at 4:00 PM, Jerry Mulchin jmulc...@cox.net wrote:
Here is the antenna I purchased from Ebay (China). This is a Lucent 40dB
timing antenna that should work
for any GPS receiver. Mine took about 2 weeks to get here and there were no
problems getting it. This unit
is
There are still some listed at GBP 19.00. Search for lucent 40db.
Orin.
On Mon, Apr 2, 2012 at 4:14 PM, Pete Lancashire p...@petelancashire.comwrote:
All gone .. I got one. I'm happy for $26 but the thing was pretty
badly treated in its life and the seal did not
look well. If yours is as
Magnus, is that the same little transformer that I sent you a while
back? If so, did you add the PTC current limiter that I included?
That should have saved it from failure of the driver transistors. I
think there's a problem with that circuit, so I don't think you
should take a chance on any
On 04/02/2012 11:35 AM, Stijn Nestra wrote:
The PRS10 schematics are available on line from Didier.
See the following link:
http://www.ko4bb.com/manuals/index.php?dir=05%29_GPS_Timing/SRS
Thanks!
On the same page (21/24) as the x2000 PPS time interpolator is also the
PPS programmable delay
There's a lot of five Racal survey antennae on eBay, lot 370600485855
which have been round at least once before. I use one of these with a
T'bolt and it performs extremely well; I'm not sure what one would do
with the other four however...
5 Volt operation, TNC connector, c. 30 dB gain.
Magnus
RC oscillator and demodulator along with the 1 uF and integrator are all
standard Efratom, use different pins and the oscillator is 2.72 KHz the
problem is the signal path from the detector to the demodulator. That is what
I
am looking for. Will get there. will take time.
Thanks
Having read this NIST review paper by Thomas E. Parker, The uncertainty in the
realization and dissemination
of the SI second from a systems point of view
http://tf.boulder.nist.gov/general/pdf/2564.pdf
...it seems that any potential improvement in frequency standards (Cs fountain
- optical
I have a Symetricom 58532A which I bought on eBay for $50 with shipping.
That is probably the best antenna you can get, and it won't break the bank.
I also have a Trimble Bullet, the antenna that was designed to go with the
Tunderbolt. It is a very good antenna also, but harder to find, and it has
On 4/2/2012 5:39 PM, Bill Riches wrote:
Question is that I am looking for suggestions for GPS antenna for t-bolt.
I use an Andrew GPS-QBW-26N (quadrifilar). 26 db amp + 4 db antenna
gain, through an HP 58516 distribution amp. Works well for me.
Hi Didier,
I have one of the Trimble Bullet antennas, that was supposed to be from
a working system, but it is deaf as a post... really dead. Given that
it is supposed to be more than 30db gain, it should do better than any
of the hockey puck antennas.
I wonder if there is a common failure
I have some SPTB-100 units, which are similar to M100 units, which
may be similar to yours. A few years ago, one failed to lock,
regardless of adjustment, and I found that one of the integrator
capacitors in the OCXO control loop was very leaky. I don't recall
which one, and couldn't even
Here is a picture of the guts of the antenna that was made for
the Thunderbolt. They don't appear to have gone to much effort
to have a high horizon.
-Chuck Harris
Chuck Forsberg WA7KGX N2469R wrote:
I got a mushroom shaped antenna along with my Thunderbolt.
It came with some rg58 terminated
c...@omen.com said:
Presumably a timing antenna would block low elevation signals to reduce
multipath.
Maybe, but there is a software aspect to the filter. You get to select the
elevation angle.
I don't remember seeing any specs about the filtering angles of various
antennas. Has anybody
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