As of 01 January 2012 all three of my systems began to Sync.the year
incorrectly. I am using Trimble TimeKeeper ver. 1.02. The year 2020 now
appears on my PC's, the time however is correct. I use Windows NT, XP,
and Vista. The Date is correct when displayed in TBoltMon. I
reinstalled the softwa
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Luis Cupido
> Sent: Sunday, January 22, 2012 6:24 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] GPIB programming 'íb' style
>
> Is it possible to program under Windows, still
> Ultra-conservative and "overkill" but two of the nine failed. OK it is 30
> years old (made is '83, I think)
Use your fingers or similar as a quick-check thermometer. Are working ones
hot? warm? If not, power/temperature is not likely to be the problem.
My guess is that somebody picked t
Bob wrote:
Specifying the digit scan transistor is a bit tricky, and often power
dissipation is just not a concern. Why? Consider the duty cycle. A transistor
switching one amp (a LOT for 7+1 segments) with a 0.6V saturation dissipates
600mW, but only when on. Given a 1/8 duty cycle that's 75mW
On Sun, Jan 22, 2012 at 3:18 PM, Robert LaJeunesse
wrote:
> Specifying the digit scan transistor is a bit tricky, and often power
> dissipation is just not a concern. Why? Consider the duty cycle. A transistor
> switching one amp (a LOT for 7+1 segments) with a 0.6V saturation dissipates
> 600mW,
Here's a graph of the ADC readings as I dropped the power supply
voltage from 18V down to 6V on my non-locking FE-5680:
http://n5tnl.com/time/fe-5680a/graphs/unit_1_volttest.png
I'd hoped that channel 2 would have been a supply voltage, but it
isn't, or it's one of the low voltage regulated ra
On Sun, Jan 22, 2012 at 6:24 PM, Luis Cupido wrote:
> Is it possible to program under Windows, still
> using the old_style national instruments 'ib...' calls.
> when using USB-GPIB interfaces like prologix or others ?
>
> p.s.(I only have real GPIB 'c' programming experience on MSDOS...
I thi
Just wondering if anyone has any service info for the Datum 1000B.
My new to me unit may have a few issues (:
(The unit seems to work okay for a day or so then the phase of the output
fluctuates slightly with a period of a few hundred seconds or so.) It's only
been powered up for less than
I made a typo. the correct email for Roland is:
roland.guil...@yahoo.com
Hi,
In response to several off-list queries, I contacted Roland Guilmet to see
if he still had any available.
In another development, a Group member has been able to change the
wavelength limits of the scan, without openi
Typo on his email... it is roland.guil...@yahoo.com
On 1/22/2012 9:40 PM, J. Forster wrote:
Hi,
In response to several off-list queries, I contacted Roland Guilmet to see
if he still had any available.
In another development, a Group member has been able to change the
wavelength limits of th
Hi,
In response to several off-list queries, I contacted Roland Guilmet to see
if he still had any available.
In another development, a Group member has been able to change the
wavelength limits of the scan, without opening the unit, so two can be
paralleled to cover the visible spectrum.
Rolan
Is it possible to program under Windows, still
using the old_style national instruments 'ib...' calls.
when using USB-GPIB interfaces like prologix or others ?
many tks.
Luis Cupido.
ct1dmk.
p.s.(I only have real GPIB 'c' programming experience on MSDOS
all the rest is using high level stuff li
Hi
6K is about right. The resistor was typically a big ceramic wire wound 10K
variable.
No guarantee it's right for a clock, just that it's right for a teletype.
Bob
On Jan 22, 2012, at 5:46 PM, Jim Hickstein wrote:
> On 2012/01/22 15:29, Bob Camp wrote:
>> Hi
>>
>> Teletype loop current
Chris,
Try BC327 / BC328, they are pinout-compatible if you fit them "flipped".
On paper they are less powerful but the high gain and low saturation voltage
works in your favour. I have used them for anode drivers in seven segment
displays. Inexpensive, worth a try!
Kind regards
Chris
> -Ori
Specifying the digit scan transistor is a bit tricky, and often power
dissipation is just not a concern. Why? Consider the duty cycle. A transistor
switching one amp (a LOT for 7+1 segments) with a 0.6V saturation dissipates
600mW, but only when on. Given a 1/8 duty cycle that's 75mW average. An
On 2012/01/22 17:03, Brooke Clarke wrote:
Hi Jim:
On web page:
http://www.prc68.com/I/SWCC2.shtml#SC
I have data from Henry W. that says 120 V (my memory was wrong on the 200 V) and
he says 250 ma.
This will give about 66 times faster response time than using 3 Volts.
Oh, I was reading the du
Hi Jim:
On web page:
http://www.prc68.com/I/SWCC2.shtml#SC
I have data from Henry W. that says 120 V (my memory was wrong on the 200 V)
and he says 250 ma.
This will give about 66 times faster response time than using 3 Volts.
I'm spending time on this because with low loop voltage the action
On 2012/01/22 15:29, Bob Camp wrote:
Hi
Teletype loop current as in 20 ma through the coil via a dropping resistor off
of 125 vdc.
Value for the dropping resistor? (I know, I'm an Extra, and I used to design
digital circuits, so I should know this stuff. But I've been in software for a
lo
Thanks everyone for all the options. OK there are real MPS-U51 for $5
or $6 each. The NTE parts sells for between $25 and $30. HP places
these just on top of each digit with the tap fasting the plastic LED
so it can't short. HP also cuts the taps so they can't short to the
case. I think they
Hi:
Synchronizer coil data at:
http://www.prc68.com/I/SWCC.shtml#SC <- old 2 coil sync
and
http://www.prc68.com/I/SWCC2.shtml#SC <- newer single coil sync
The WU central office used a 200 VDC supply and the loop drove a number of series connected sync coils. A large ceramic
tube variable resis
If you are keeping a network of PCs in sync to time the software to
use is "NTP".
http://www.ntp.org/
NTP cansyncto your GPS(s) and to other NTP severs out on the Internet.
On Sun, Jan 22, 2012 at 1:06 PM, Dennis Czelusniak
wrote:
> As of 01 January 2012 all three of my systems began to Sync.the
Where does one find Trimble Timekeeper software? and documentation on
how to use it?
Thanks,
Paul
On 1/22/2012 3:06 PM, Dennis Czelusniak wrote:
As of 01 January 2012 all three of my systems began to Sync.the year
incorrectly. I am using Trimble TimeKeeper ver. 1.02. The year 2020 now appea
Hi
Teletype loop current as in 20 ma through the coil via a dropping resistor off
of 125 vdc.
Bob
On Jan 22, 2012, at 4:06 PM, paul swed wrote:
> Nice pixs
> I would think that the setting winding would be of the old teletype loop
> voltage and current and that the local winding battery as
On 2012/01/22 14:56, Don Latham wrote:
NICE!
Measure the resistance of the coil, and see what the current would be
with the voltage you want to use. Figure out what the current might have
been in the original installation. Ebay has an installation manual at
auction for these clocks, may have a de
A good source of replacement parts for test equipment is Sphere Research (
http://www.sphere.bc.ca/ ).
They don't show any in stock, but you could email.
NTE is a good source for replacement parts, but the NTE189 is really
expensive ($26.73 from Newark
and $30.59 from Mouser). For the cost of a co
Nice pixs
I would think that the setting winding would be of the old teletype loop
voltage and current and that the local winding battery as mentioned would
have been 3-6 VDC.
Nice looking clock lucky you to find such an instrument.
Regards
Paul.
On Sun, Jan 22, 2012 at 3:49 PM, Jim Hickstein wro
As of 01 January 2012 all three of my systems began to Sync.the
year incorrectly. I am using Trimble TimeKeeper ver. 1.02. The year 2020 now
appears on my PC's, the time however is correct. I use Windows NT, XP, and
Vista. The Date is correct when displayed in TBoltMon. I reinstalled the
softw
On 01/21/2012 06:13 PM, Ulrich Bangert wrote:
Magnus,
The end result will be that the instrument limit slope hits the level of the
stable source much earlier.
Can you elaborate this claim a bit more? I Think I do not understand it in the
correct way.
You have a 1/f amplitude slope from th
The package is a TO-202 with the tab cut off or at least the MPS-U51
uses a TO-202 package. Be careful when you replace it because the
pinout is EBC which is deprecated in power transistor packages.
Ic = 2.0 A
Vceo = 30 V
Pd = 1 W @ Ta 25 C
hfe = 60 @ 0.1 A
Ft = 50 MHz min
This is a very non-cri
NICE!
Measure the resistance of the coil, and see what the current would be
with the voltage you want to use. Figure out what the current might have
been in the original installation. Ebay has an installation manual at
auction for these clocks, may have a description of the driving circuit.
In extr
Here's some source and a cygwin binary (let me know if I need to do a
win32 binary) for a little app that will try all the known data
request commands on your FE-5680. If you're willing and able, I'd
like for you to run this against each unit you have before it's
locked and again after it's lo
On 2012/01/22 13:58, Jim Hickstein wrote:
On 1/22/12 1:56 PM, paul swed wrote:
Yahoo for real voltage power and current. Teletype style.
Yes indeed the old loop currents seriously worked.
No AA batteries here. ;-)
How far will I get with my 3 D cells? They make it wind nicely, but I've been
NTE lists their equivalent as: NTE-189 See:
http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search
Newark has 262 of them :-)
Don
Chris Albertson
> I have an eBay HP5328A counter with two dead digits on the display. I
> figured out the problem was two dead transistors. I can swap
> transistors
Chris wrote:
Motorola MPS-U51
I look up the spec in the mps-u51 and see it is a to-220 like case and
can handle 1W.
The Motorola "Uniwatt" case was not really comfortable dissipating
one watt even in 25 degree free air (the book spec). I used them and
their NPN counterpart, the MPS-U01 in
OK Clark put some pix up.
On Sun, Jan 22, 2012 at 2:58 PM, Jim Hickstein wrote:
> On 1/22/12 1:56 PM, paul swed wrote:
>
>> Yahoo for real voltage power and current. Teletype style.
>> Yes indeed the old loop currents seriously worked.
>> No AA batteries here. ;-)
>>
>> When will we see a pix o
On 1/22/12 1:56 PM, paul swed wrote:
Yahoo for real voltage power and current. Teletype style.
Yes indeed the old loop currents seriously worked.
No AA batteries here. ;-)
When will we see a pix of this unit??
It's my day off. :-)
Regards
Paul
WB8TSL
On Sat, Jan 21, 2012 at 9:25 PM, Brooke
Guess I simply did not read enough threads I see the pix.
Thanks
On Sat, Jan 21, 2012 at 9:42 PM, Brooke Clarke wrote:
> Hi again:
>
> Sorry sent too soon.
>
> The time constant of the loop is L/R. By increasing R the loop runs
> faster.
> Western Union ran the clocks from 200 Volts with a drop
Yahoo for real voltage power and current. Teletype style.
Yes indeed the old loop currents seriously worked.
No AA batteries here. ;-)
When will we see a pix of this unit??
Regards
Paul
WB8TSL
On Sat, Jan 21, 2012 at 9:25 PM, Brooke Clarke wrote:
> Hi Jim:
>
> There are a number of options.
>
>
On 1/22/2012 1:14 PM, Oz-in-DFW wrote:
> Unknown, untested, looks to be complete but clearly needs attention.
>
> Known issues:
>
> INST ID button is sticky
> Missing a side cover
> CHANNEL B BNC out of round, but looks reshapeable.
> ARM SMB is damaged and will need to be replaced.
>
> High Res pi
Hi Chris:
To get the LED segments to be the same brightness some form of current limiting is needed and this usually involves
dropping resistors and an active current limiting circuit and that burns up a lot of power.
What does the drive circuit look like?
For example if you connect a scope to
Unknown, untested, looks to be complete but clearly needs attention.
Known issues:
INST ID button is sticky
Missing a side cover
CHANNEL B BNC out of round, but looks reshapeable.
ARM SMB is damaged and will need to be replaced.
High Res pics at http://www.ozindfw.net/sell/DC510/
$50 or best of
I have an eBay HP5328A counter with two dead digits on the display. I
figured out the problem was two dead transistors. I can swap
transistors with a good digit and the problem moves.
I'd not worked on LED displays before. Turns out only one digit is
lit up at a time, they strobe the digits in
The current batch of (about) $40 units are different from what was
available a year ago. These new ones require 5V DC input in addition
to 15V and can only be programmed via RS232 a few Hz away from 10MHz.
So they are only good for use as a 10MHz reference
"Option 2" in the book refers to a diffe
Sounds like a CATV amp, Maybe the datasheet from the CA2600 would help? I have
a TRW CA2600 here and the dimensions you specified are the same.
http://www.datasheets.org.uk/dl/Datasheets-8/DSA-152713.pdf
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time-nuts mailing list -- time-nuts@febo.com
I'm trying to identify the above item. I believe it's an RF amplifier. It's
a black module approx. 1.5 inches square by 0.5 inches high. It has 8 pins
on the bottom of the package.
I've tried Google but no joy. If anyone recognises it or even better has a
data sheet than I would be very grateful.
> Including the very newest ones from the past couple of weeks?
R: yes
>Are you using
> the talk-only option, or the Acquire->HP 53131... option that I just
added
> recently?
R: yes but not work. No input data in monitor mode.
> When you use the 'Monitor' button in the acquisition dialog, do yo
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