Hi all,
Hello Dani, sorry, but you cannot find some documentations, with
schematics, over more newer Hameg equipments, in all cases not from Hameg!
:-( Its practically a illusion a real problem...
K.
2011/12/8 Daniel Mendes dmend...@gmail.com
Maybe i´m blind but at the Hameg site I can only
A while back I picked up a couple of what Fair Radio was calling data line
filters. They have a six-digit Nixie time display (hours, minutes, seconds)
and apparently decode and display some kind of analog time code (IRIG, maybe?).
It was made sometime in the early 70's; it's wire-wrapped with
Bob Camp wrote:
Hi
If you dig into the circuit, the resolution of the DDS is indeed 7x10^-13 per
LSB.
Bob
Thanks for the confirmation.
On Dec 9, 2011, at 9:51 PM, Bob Smither wrote:
Bob Smither wrote:
snip
My documentation states that the full range of adjustment is:
7f ff ff ff =
Hi,
From: Steve Byan steveb...@verizon.net
NSN 6625003684180
==
NSN: 6625-00-368-4180
INDICATOR, DIGITAL D
Part No: 0N194800
Price Range: n/a
Delivery Range: n/a
Mfr/OEM/Agencies: JOINT ELECTRONICS TYPE DESIGNATION SYSTEM, NATIONAL SECURITY
AGENCY
==
Bye,
Jean-Louis
Hi
Maybe you could call them up and ask for information on the system they went
with….:)…
Sounds like a great way to wind up on a no fly list.
Bob
On Dec 11, 2011, at 11:40 AM, Jean-Louis Noel wrote:
Hi,
From: Steve Byan steveb...@verizon.net
NSN 6625003684180
==
NSN:
I doubt that you will ever find a manual or schematics, but you
should be able to decipher enough of the circuitry to figure out how
to fire it up and talk to it. The digits should be arranged in either
a counter or individually addressable. If it's a counter, you should
be able to find a 1
Looking at the picric II schematic. Trying to decide on the bet
substitute parts for some obsolete parts.
It uses a few 74ACxxx locic family parts that are no longer made. I
think the 74H or 74F series should work What do you think? I may
have to adapt an SMD part. They have to work on
I looked at your first post again and noticed there were apparently
lots of TTL circuitry, so it could be an IRIG code receiver, and you
should be able talk to it. If you don't have a source readily
available, you may be able to fool it into responding a little to
gibberish applied from a
Better use 74HC or 74HCT parts, the 74F should be TTL FAST parts that
require high input current to be driven correctly.
On Sun, Dec 11, 2011 at 9:04 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
Looking at the picric II schematic. Trying to decide on the bet
substitute parts for some
The 74AC175 can not be subituted as the circuit needs the higher voltage
output, contact me off list if you need a few parts, or use the surface
mount PC board as these parts are still around. See options here :
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic
Stanley
Fascinating. I also have one of these with slight differences, but it
does have a Fort Meade tag. Bought it from a guy on the BoatAnchors
list in Atlanta in the dim past.
The HTID number is H9823180065821, NSN 664500DISPLAY, User ID STWA104
The rotary switch adds a 160 KHz position. The two
This was talked about several years ago, but did anyone get a fully functional
design running using electromagnets to synch at one or both ends of the travel?
In the meantime I am using a sensor to measure the time period of the pendulum
for this particular new grandmother wall clock and from
I did the NSA museum tour too. Well worth the trip.
I got a CIA polo shirt at the employee gift shop. Yeah, where do you wear it? I
put it on for one of those 9/11 Conspiracy events.
Do you work for the CIA?
No, I just wear their shirts.
-Original Message-
From: Bill Hawkins
There have been several (dont ask me for references) schemes for
synchronising
observatory clocks. The problem was often complicated by the
pendulums running in a vacuum or reduced pressure and thus being hard
to adjust.
The type I remember best was a weak electromagnet under the bob that
Check the Scientific American Amateur Scientist index for clocks here:
http://amasci.com/amateur/sciamdx.html#52-CC It looks like the September 1974
issue has the article on using discrete cmos logic to synchronize a pendulum
clock to a quartz crystal.
Tom WB6UZZ
--- On Sun, 12/11/11,
Try:
http://www.bmumford.com/clocks/hj/hj0199.html
and similar stuff found by googling driving pendulum clock
Lots of food for thought. Mumford has put some thought into it.
A lot depends on why you want to drive the thing; e.g. measuring
perturbations in the gravitational field, a sensitive
I think I've seen IRIG Time Code SW for the PC that uses a sound card, but
I forget where. The various IRIG formats are well dovumented.
And yes, Time Code readers were used with high and low speed searches on
IRIG tape recorders. You set Start and Stop points and the tape would
Play, Stop,
Like many of you, I have seen these advertised on Ebay at good prices.
Also, like many of you, I am confused about the 'programmability' and
connections.
Many of them advertise these connections:-
PIN 1: INPUT +15V to +18V
PIN 2: GROUND
PIN 3: LOCK/UNLOCK (high = unlock)
PIN 4: INPUT +5V
PIN
alex mclaggan wrote:
Like many of you, I have seen these advertised on Ebay at good prices.
Also, like many of you, I am confused about the 'programmability' and
connections.
Many of them advertise these connections:-
PIN 1: INPUT +15V to +18V
PIN 2: GROUND
PIN 3: LOCK/UNLOCK (high = unlock)
I acquired an old pendulum regulator from about the 30's-40's and it had an
electromagnetic coil and a small magnet attached to the pendulum. Some old
electronics passed a constant (but adjustable) current through the coil
either pushing or pulling the pendulum slightly to make its amplitude
Any chance of a photo?
On 12 December 2011 04:26, Bob Camp li...@rtty.us wrote:
Hi
Maybe you could call them up and ask for information on the system they
went with….:)…
Sounds like a great way to wind up on a no fly list.
Bob
On Dec 11, 2011, at 11:40 AM, Jean-Louis Noel wrote:
Try their reading room first.
http://www.nsa.gov/public_info/foia/reading_room/index.shtml
If there is no information in the reading room, do a FOIA. This
information is always run past lawyers, not engineers. Don't be
surprised if you get a call from whatever NSA calls their legal
I'm seriously toying with the idea of putting a small heater in the
cabinet, so I can have an OCPO - oven controlled pendulum oscillator.
Hi Jim,
Yes, do it! No joke. It should work really well and be easy to
do. Temperature is a useful lever in almost all clocks.
Also consider a 1 Hz speed
On Dec 11, 2011, at 4:12 PM, Bill Hawkins wrote:
Fascinating. I also have one of these with slight differences, but it
does have a Fort Meade tag. Bought it from a guy on the BoatAnchors
list in Atlanta in the dim past.
The HTID number is H9823180065821, NSN 664500DISPLAY, User ID STWA104
On Dec 11, 2011, at 5:25 PM, J. Forster wrote:
I think I've seen IRIG Time Code SW for the PC that uses a sound card, but
I forget where.
http://www.dolben.org/IRIG.php
Best regards,
-Steve
--
Steve Byan steveb...@me.com
Littleton, MA 01460
On Dec 11, 2011, at 6:18 PM, Jim Palfreyman wrote:
Any chance of a photo?
http://www.gull.us/misc/nixie/dlf-front.jpg
It's not mine, but it looks the same except that the yellow sticker is on the
side of mine rather than the front.
Best regards,
-Steve
--
Steve Byan steveb...@me.com
Sorry I ever started this. In the past the FE5680's started out with a
50.255 MHz XTAL, some time in the 2002 2003 timeframe they switched to 60 MHz
using a DDS in the loop. All of these units can only be stepped in 7 E-13
steps limited by the resolution of the DDS. Having followed all the
In a message dated 11/12/2011 23:01:14 GMT Standard Time, smit...@c-c-i.com
writes:
Can anyone tell me if they ALL have the MAX level shifter/driver chip
fitted, even though it may not be connected to the connector ? I don't
want full programmability, just 10 MHz frequency correction.
On 12/11/11 4:04 PM, Tom Van Baak wrote:
GCPC -- gravity controlled pendulum clock (elevation)
intriguing. From your parenthetical remark, I'm assuming you move the
whole assembly up and down to adjust the speed?
I was thinking about a huge mass that moves around?
let's see.. period is
Your timing is good; I'm writing a HSN article right now that
touches on all the levers:
Hi Tom - what is HSN?
John K1AE
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
You could put two metal tabs on the pendulum arm to be influenced by two
proportionally biased electromagnets. A ferrous one to speed up the arm
and a non-ferrous one to slow down the arm using eddy current.
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
Thanks guys. Got the info I had been looking for. This group is a great
resource!
Only purpose for this project is so that the Westminster clock chimes at the
same exact moment at the GPS driven UTC LED display in the lab shows the
quarter hour.
Why
Why not! :- )
-Brian, WA1ZMS
Maybe something like a Datum or AstroData.
The reverse code switch is for reading tapes backwards. It looks like a
modified standard product. It does not appear to interface w/ a tape
search controller.
At a guess it's mid 1960s to mid 1970s, to go w/ something like an Ampex
FR1800 or similar
On 12/11/11 5:53 PM, Brian, WA1ZMS wrote:
Thanks guys. Got the info I had been looking for. This group is a great
resource!
Only purpose for this project is so that the Westminster clock chimes at the
same exact moment at the GPS driven UTC LED display in the lab shows the
quarter hour.
Jim-
As soon as I hit the send icon, I knew I should have been more specific! :-)
How about this...when I'm in the ham shack and I hear the clock down the
hall (approx. 10mtrs away) chime, I'd like to be able to glance up at the
large LED display at the top of one of the test equipment racks
It was just on the thread a month ago.
nematime $15 donation.
I have used it and it worked well.
On Sun, Dec 11, 2011 at 5:25 PM, J. Forster j...@quikus.com wrote:
I think I've seen IRIG Time Code SW for the PC that uses a sound card, but
I forget where. The various IRIG formats are well
I had hoped the frequencies listed on the controls might trigger some
association in someone who's knowledgable about time-codes. 250 Hz
doesn't seem to be a legal IRIG time-code frequency, although 1 kHz is.
I'd try feeding it with various frequencies as others have suggested and see
what
gandal...@aol.com wrote:
snip
The FEI part number you are looking for is 217400-30352-1, it is often
clearly visible in the auction photos and can be seen in at least one of the
photos in the above link.
I'm sure all will do what you ask but the biggest problem I found was
actually
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