Is the GWEN (Ground Wave Emergency Network) still active, and why was this
never combined with LORAN or WWV? I had never heard of this controversial
network until recently, and never knew it had a number of stations here in
Colorado, one only five miles away.
Thomas Knox
Am 18.12.2012 03:01, schrieb David:
That is the stuff but Tektronix had some with an even smaller
diameter. It would be nice to have a new source as I would hate to
cannibalize oscilloscopes for it.
Could be Sage Wireline. Also used for couplers and RF power amps.
The GWEN system is no longer active. Many sites were converted to
provide the DGPS signal.
Years ago I found some program that could decode the DGPS signal from a
shortwave radio and identify the site.
http://www.lazygranch.com/dgps_beacons.htm
On 12/18/2012 12:12 AM, Tom Knox wrote:
Is
I have a few questions, please, ...re: Lady Heather. I have had this
application installed for some time, ...but have not used it since I thought it
was only for Thunderbolt GPSDO.
Since I have yet to afford a TB, (maybe Santa will come this year ). I have,
however, recently added a Trimble
I think not Wireline. That has a rather 'loose' twist coupling between the two
internal lines. The cable is probably purpose designed for use in delay lines
and actually did have a helically wound inner conductor. In a previous life
working for a bit of Marconi that made tv camera systems we
It is little short of brilliant….
Put t=GMST in the command line, and the Lady comes up in Sidereal Time,
ticking away in Sidereal seconds.
It was not exactly obvious that it would do it. I have had so much difficulty
trying to set up and regulate a master clock to Sidereal time, and Lady Heather
Try here:
http://www.ke5fx.com/heather/readme.htm
LH has not a real manual but a list of command line options. I see that
there are many out there who (like me) still appreciate the command line
way of using computers.
There is also the command line kung-fu, for example:
You tie the reset through a 1 K r to vcc and you still see
the reset signal?
Yes!
And you do not see the 7 Khz coming from
the switching regulator??
No, it is clearly the line that has its source in the LM2925 5V regulator.
Note however it MAY BE that an active reset behind the lowpass
Look at the interrupt lines going to the micro. They are always a good clue.
If you see a repeating interrupt at the same rate that may give you
guidance.
On Tue, Dec 18, 2012 at 4:27 AM, Ulrich Bangert df...@ulrich-bangert.dewrote:
You tie the reset through a 1 K r to vcc and you still see
On 12/18/12 12:23 AM, Gerhard Hoffmann wrote:
Am 18.12.2012 03:01, schrieb David:
That is the stuff but Tektronix had some with an even smaller
diameter. It would be nice to have a new source as I would hate to
cannibalize oscilloscopes for it.
Could be Sage Wireline. Also used for couplers
On 12/17/12 11:21 PM, Hal Murray wrote:
Cond. Material Magnet Wire Helix
(What is magnet wire, and what does helix mean and how does it effect
coax?)
Magnet wire is enamelled wire (usually copper).
I'm familiar with that usage, but I don't know why it's interesting in the
context
Hello Nuts,
I have an HP 58503A with option H14, the Even Second Output (which doesn't
start operation unitil the unit achieves GPS lock), and would be interested
in getting it back to 1pps. I have compared the unit to one with 1pps and
can see no difference. There seems to be no jumpers that
Try these guys aiHave had luck on other parts. Aint cheap
http://www.americanmicrosemi.com/information/spec/?ss_pn=MV840
Regards
Paul
WB8TSL
On Tue, Dec 18, 2012 at 1:29 PM, cdel...@juno.com wrote:
I was recently repairing a noisy A3 module for an HP 5065A.
The phase modulator has 4 varactor
The closest thing to a manual is the comments at the start of the file
heather.cpp in your Lady Heather installation directory...
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What are the horizontal and vertical settings for that picture?
Ed
On 12/18/2012 12:29 PM, cdel...@juno.com wrote:
I was recently repairing a noisy A3 module for an HP 5065A.
The phase modulator has 4 varactor diodes in parallel.
Since I suspected a diode, I removed them one at a time.
Of
will say impressive let us no what american micro semi wants for a diode.
I suspect a few of us may need them at some point
On Tue, Dec 18, 2012 at 2:31 PM, cdel...@juno.com wrote:
The vertical is 50Mv/cm and the horizontal is 1ms/cm
The diode is connected to + 20VDC and then to a 20K
Corby,
FWIW many power rectifiers can be used as decent varactor diodes. The MV840 is
nominal 100pF at 4V with at least a 2:1 ratio (2.18 typ) from 4 to 25V. The
Vishay FGP50D-E3/54 is typically 100pF at 4V and drops to a shade below 50pF at
25V, or just over 2:1. Good news, it is in stock for
Good find on the diodes and as you say at least worth the try. Will bet
they are 10 x less expensive then americanmicrosemi. But I will say in a
pinch they bailed me out. :-) Tunnel diode for a TDR.
Regards
Paul.
On Tue, Dec 18, 2012 at 2:55 PM, Brooke Clarke bro...@pacific.net wrote:
Hi Corby:
John 2 with the same type of issue that is bad luck or simply age. Oh my do
I for see this in my future?
I would be willing to bet it exactly looks like your description. I like
the fact that for $1.23 you can get something from digikey. I do tend to
trust them and mouser.
Regards
Paul.
On Tue,
On Tue, 18 Dec 2012 16:51:02 -0500, paul swed paulsw...@gmail.com
wrote:
John 2 with the same type of issue that is bad luck or simply age. Oh my do
I for see this in my future?
I would be willing to bet it exactly looks like your description. I like
the fact that for $1.23 you can get something
I have tried to work with 4 Star Electronics. They only want to deal
with large quantity orders. I would be interested to hear if anyone
has had better luck.
David N1HAC
On 12/18/12 4:42 PM, John Miles wrote:
[1]www.octopart.com identifies 23 of them in stock at a reseller
Greg Troxel g...@ir.bbn.com writes:
Date: Sat, 15 Dec 2012 13:51:45 -0500
In central mass, ATT and tracfone (? carrier) are showing phone times
very close to 1 min slow. Virgin/sprint is ok. I've never seen this
before - usually it's a few s slow.
Thanks for all the comments. Following
Am 18.12.2012 22:42, schrieb John Miles:
Just curious, what was the 5065A acting like with the bad diode? Mine seems
to run quietly for days at a time, but then occasionally it generates excess
low-level random noise for a period of hours to days (see image). Every
time I've tried to get
HP has a patent on this scheme. The paralleling of the diodes is for
noise reduction. Personally, I would have rejected the patent since this
is the kind of thing that is obvious to those skilled in the art.
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