Re: [time-nuts] Thunderbolt GPS TimeKeeper

2012-01-22 Thread David J Taylor 
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 software on a spare PC that is not connected to  my 
network, same results. Is there a fix somewhere or am I overlooking 
something obvious?

Regards, Dennis WD8DCJ



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.
--
Chris Albertson
Redondo Beach, California


.. with setup instructions and hints on using with Windows here:

 http://www.satsignal.eu/ntp/setup.html

I have a few of my Windows PCs connected to a variety of GPS sources 
(Garmin GPS 18/x LVC and Sure GPS evaluation board).


Cheers,
David
--
SatSignal software - quality software written to your requirements
Web:  http://www.satsignal.eu
Email:  david-tay...@blueyonder.co.uk 



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Re: [time-nuts] GPIB programming 'íb' style

2012-01-22 Thread John Miles 


> -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
> using the old_style national instruments 'ib...' calls.
> when using USB-GPIB interfaces like prologix or others ?

There is currently no complete, supported NI488.2 ("ib...") API
implementation for Prologix adapters.  If you have TimeLab installed, check
out gpibport.cpp in the drivers\shared directory underneath the installation
folder, and you'll see separate code paths for the two interfaces (actually
three, counting the Prologix GPIB-LAN hardware).

One minor point to note: if you want to author for NI488.2, many of the
ib... calls have been removed in the 64-bit Windows edition of the NI488.2
API, so you'll end up using ibconfig() in a lot of places where you formerly
used the older functions.  For instance, ibtmo(ID, timeout) would be
replaced by ibconfig(id, IbcTMO, timeout).  The older API is still available
in 32-bit land, but it would be better for any new code to use the newer
guidelines, which is why I'd recommend looking at the TimeLab source rather
than my older GPIB stuff if you want to see some actual working code.

-- john



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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Hal Murray 

> 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 that transistor because it could handle the 
current and was conservative at the power dissipation.


-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Charles P. Steinmetz 

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 average. 
Any stinkin

TO-92 will handle that power all day long! Only an ultra-conservative design
would use an exposed tab transistor, as expected for HP!


OK, looking at the schematic 7 of the digit drivers have 7+2 loads 
(DP and annunciator LEDs).  Each segment is driven from 5 volts 
through two saturated transistors and an LED.  Assuming 0.6 + 0.6 + 
1.7 V, each segment current is 0.21 A and the total digit current 
with all 9 segments lit is 1.89 A, for a digit driver dissipation of 
(1.13 W x duty cycle).  With 9 digits, the duty cycle must be less 
than 11.1%, so the power dissipation will be around 125 mW worst 
case.  As Bob said, any TO-92 will dissipate this with no difficulty.


The problem is the current.  You need transistors that can handle 
1.89 A without sweating.  The MPSU51 is rated at 2A continuous, and 
is not specified for pulse duty so there is no way to know how much 
if any more current it will safely handle at an 11% duty cycle.  The 
fact that Chris has two bad ones may be taken to indicate that they 
were not hugely overspecified in this application.  I would be 
looking at transistors rated for a maximum continuous collector 
current of at least 3 A, preferably more.  Only a very few TO-92 
devices fit this bill.  I think my first choice would be the ZTX949 
-- it has low saturation voltage and is rated for pulse current 
substantially in excess of the continuous current rating, and its 
pinout matches the MPSU51.  I have used lots of them and they are 
very rugged.  In stock and priced from $1.12 to $1.24 in singles from 
Digi-Key, Mouser, and Avnet.


Best regards,

Charles









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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Chris Albertson 
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, but only when on. Given a 1/8 duty cycle that's 75mW average. Any 
> stinkin
> TO-92 will handle that power all day long! Only an ultra-conservative design
> would use an exposed tab transistor, as expected for HP!

Ultra-conservative and "overkill" but two of the nine failed.  OK it
is 30 years old (made is '83, I think)

These were in air.  The tabs were not screwed to anything.  I think
looking at how this display works it was likely used for many
different instruments, not just the hp5328.  They must have sold many
thousands of these
>
Chris Albertson
Redondo Beach, California

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[time-nuts] FE-5680 ADC vs. supply voltage

2012-01-22 Thread Scott Newell 
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 rails.  I was 
surprised to see the channel 4 (still assuming it's VCXO related?) 
swing change with supply voltage.


--
newell  N5TNL


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Re: [time-nuts] GPIB programming 'íb' style

2012-01-22 Thread Chris Albertson 
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 think the big different between DOS and Windows will be the windows
programs are structured differently.   With MSDOS you "own" the
computer and there is nothing else going on.  It is like programming
an embedded micro controller.   With Windows you respond to events.
For example in DOS to read once every second you would do the read, do
a one second delay and then loop back.  In Windows you'd start a one
second timer and then do your read as a response to the timer event.
No delay loop.
-- 

Chris Albertson
Redondo Beach, California

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[time-nuts] Datum1000B service info

2012-01-22 Thread Mark Spencer 
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 a week so I'm not ready to start tearing it apart 
yet.

The performance when it is working okay is considerably better than spec and 
it's helped confirm the performance of my FTS 1050 which was the main reason I 
acquired the unit so this acquisition has not been a total loss.

The packaging of the unit was less than stelar in my view so it may have 
sustained some shocks in transport, but nothing rattled when I received the 
package.

Any comments would be appreciated.

Regards Mark S



Sent from my iPad
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[time-nuts] Ocean Optics HR2000 USB Spectrometers... Correction

2012-01-22 Thread J. Forster 
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 opening the unit, so two can be
paralleled to cover the visible spectrum.


Roland responded:

"The Spectros are $110 including shipping via Flat Rate Box. I still have
some.

Regards,
Roland"


His email address is: roland.guil...@yahoo.com

PLEASE, if you are interested, contact him directly, not via this list or me.

Best,

-John

===








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Re: [time-nuts] Ocean Optics HR2000 USB Spectrometers

2012-01-22 Thread Peter Gottlieb 

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 the scan, without opening the unit, so two can be
paralleled to cover the visible spectrum.


Roland responded:

"The Spectros are $110 including shipping via Flat Rate Box. I still have
some.

Regards,
Roland"


His email address is: roland.cuil...@yahoo.com

PLEASE, if you are interested, contact him directly, not via this list or me.

Best,

-John

===




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-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1416 / Virus Database: 2109/4760 - Release Date: 01/22/12




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[time-nuts] Ocean Optics HR2000 USB Spectrometers

2012-01-22 Thread J. Forster 
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.


Roland responded:

"The Spectros are $110 including shipping via Flat Rate Box. I still have
some.

Regards,
Roland"


His email address is: roland.cuil...@yahoo.com

PLEASE, if you are interested, contact him directly, not via this list or me.

Best,

-John

===




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[time-nuts] GPIB programming 'íb' style

2012-01-22 Thread Luis Cupido 

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 like labview. I have
no clue about what GPIB-USB does when we leave
the 'automagic' install & use scenario).

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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Bob Camp 
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 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 long time.  Let's see E over I R.)
> 
> I measured the setting coil at the terminals: 11.5 ohms.  To limit 125 VDC to 
> 20mA, this would need an additional 6.2 Kohms.  I suppose that represents the 
> metallic circuit back to WU plus a bunch of other 11.5-ohm clocks on the same 
> circuit, plus a compensating resistor back at the head end?
> 
> Locally, a D cell (or 3 in series, which I have), with about 200 more ohms, 
> might do.  (Reaches into desk drawer.)  Let's see if I still have that bunch 
> of 100-ohm resistors left over from making an ISDN terminator.  Why, yes! 
> Quarter-watt.  P over I E.  90mW.  Eh, it probably won't blow up.
> 
> I tried measuring the winding coil, too: 0.1 ohms, but I'm not sure I was 
> getting it in the right place.  And now I've put the face back on the clock. 
> Otherwise I couldn't tell what time it was!  I am really trained to look at 
> that spot on the wall for this information.  While the SWCC was in the 
> hospital (for over a year) I had to buy another clock to put there.  The 
> blank spot was driving me crazy.
> 
> ___
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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Chris Stake 

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

> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Chris Albertson
> Sent: 22 January 2012 22:41
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP5328A LEDS driver transistor
> 
> 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 grossly per spec'd them because they are used in a
> place where there is no heat sink and very little airflow.   I say
> "over spec" but yet two burn out.
> 
> Funny the seller thought the counter worked.  The burned out digits
> were the least significant and with them out you still have a 7
> digital counter.  Really all that most people need for aligning radios
> and such.
> 
> My plan now is to do a parametric search on Digikey/Mouser a quick
> search found many for under $1 that could work.  I'll wait 'till I'm
> in need of some parts to build my next projects and add a few
> transistors.
> 
> 
> On Sun, Jan 22, 2012 at 1:07 PM, Stan Searing 
> wrote:
> 
> > on my shelf I'd sell for $50 if you are ever up in San Jose).
> 
> If you could drop them at Cal State I might take you up on that.
> Yes,  I'll look at that transistor below
> 
> > I'd use a MJE171GOS-
> ND
> >  or 497-4829-5-ND 4829-5-ND/954133>
> > from
> > DigiKey (but as mentioned by others,
> > watch the pinout, as most any power tab transistor will have the
> collector
> > in the center,
> > while the MPS-U51 is one of the few exceptions).  You might also need to
> > slim down
> > the leads to fit the PC board.
> >
> > Stan
> >
> >
> >
> >
> > On Sun, Jan 22, 2012 at 12:34 PM, Don Latham  wrote:
> >
> >> 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 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 sequence.  The dead
> >> > transistor is the one that controls the all the anodes in the
> >> > 7-segment LED module.  The service manual describes the transistor
> >> > like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
> >> > SI ... FT-50MHZ"
> >> > The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-
> U51
> >> > data sheet matches the part that fails so I'm sure I got a correct
> >> > cross ref.
> >> > I took a photo of the dead transistor.  It is on .1" perf board for
> >> > scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
> >> > http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1
> >> >
> >> > I look up the spec in the mps-u51 and see it is a to-220 like case
> and
> >> > can handle 1W.  I'm really surprised it burned out as I doubt an LED
> >> > requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
> >> > see it has a low saturation voltage.  Maybe that is why the selected
> >> > it as it is being driven by 7400 TTL logic that goes through a
> >> > connector and has some resistors involved.
> >> >
> >> > Question:  These seem to be hardtop find.  Can anyone suggest a good
> >> > sub"
> >> >
> >> >
> >> >
> >> > Thanks,
> >> > Chris Albertson
> >> > Redondo Beach, California
> >> >
> >> > ___
> >> > time-nuts mailing list -- time-nuts@febo.com
> >> > To unsubscribe, go to
> >> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> > and follow the instructions there.
> >> >
> >>
> >>
> >> --
> >> "Neither the voice of authority nor the weight of reason and argument
> >> are as significant as experiment, for thence comes quiet to the mind."
> >> R. Bacon
> >> "If you don't know what it is, don't poke it."
> >> Ghost in the Shell
> >>
> >>
> >> Dr. Don Latham AJ7LL
> >> Six Mile Systems LLP
> >> 17850 Six Mile Road
> >> POB 134
> >> Huson, MT, 59846
> >> VOX 406-626-4304
> >> www.lightningforensics.com
> >> www.sixmilesystems.com
> >>
> >>
> >>
> >> ___
> >> time-nuts mailing list -- time-nuts@febo.com
> >> To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/tim

Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Robert LaJeunesse 
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. Any 
stinkin 
TO-92 will handle that power all day long! Only an ultra-conservative design 
would use an exposed tab transistor, as expected for HP!

Trust me, I put over 20,000 "digit" drive transistors to work in Terminal One 
O'Hare. Non-Darlington TO-220 parts switching 6A each at 1/16 duty, mounted 
with 
a plastic rivit to nothing more than a small foil pad on 2-sided FR-4 PCB. 
Dissipation was less than 200mW apiece. Still working last I knew, after some 
25 
years. FWIW it was the LEDs that needed cooling, especially with 19,000 LEDs in 
one baggage claim sign.

Bob LaJeunesse



From: Chris Albertson 
To: Discussion of precise time and frequency measurement 
Sent: Sun, January 22, 2012 5:40:50 PM
Subject: Re: [time-nuts] HP5328A LEDS driver transistor

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 grossly per spec'd them because they are used in a
place where there is no heat sink and very little airflow.  I say
"over spec" but yet two burn out.

Funny the seller thought the counter worked.  The burned out digits
were the least significant and with them out you still have a 7
digital counter.  Really all that most people need for aligning radios
and such.

My plan now is to do a parametric search on Digikey/Mouser a quick
search found many for under $1 that could work.  I'll wait 'till I'm
in need of some parts to build my next projects and add a few
transistors.


On Sun, Jan 22, 2012 at 1:07 PM, Stan Searing  wrote:

> on my shelf I'd sell for $50 if you are ever up in San Jose).

If you could drop them at Cal State I might take you up on that.
Yes,  I'll look at that transistor below

> I'd use a 
>MJE171GOS-ND
>
>  or 
>497-4829-5-ND
>
> from
> DigiKey (but as mentioned by others,
> watch the pinout, as most any power tab transistor will have the collector
> in the center,
> while the MPS-U51 is one of the few exceptions).  You might also need to
> slim down
> the leads to fit the PC board.
>
> Stan
>
>
>
>
> On Sun, Jan 22, 2012 at 12:34 PM, Don Latham  wrote:
>
>> 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 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 sequence.  The dead
>> > transistor is the one that controls the all the anodes in the
>> > 7-segment LED module.  The service manual describes the transistor
>> > like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
>> > SI ... FT-50MHZ"
>> > The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
>> > data sheet matches the part that fails so I'm sure I got a correct
>> > cross ref.
>> > I took a photo of the dead transistor.  It is on .1" perf board for
>> > scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
>> > http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1
>> >
>> > I look up the spec in the mps-u51 and see it is a to-220 like case and
>> > can handle 1W.  I'm really surprised it burned out as I doubt an LED
>> > requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
>> > see it has a low saturation voltage.  Maybe that is why the selected
>> > it as it is being driven by 7400 TTL logic that goes through a
>> > connector and has some resistors involved.
>> >
>> > Question:  These seem to be hardtop find.  Can anyone suggest a good
>> > sub"
>> >
>> >
>> >
>> > Thanks,
>> > Chris Albertson
>> > Redondo Beach, California
>> >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com
>> > To unsubscribe, go to
>> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>> >
>>
>>
>> --
>> "Neither the voice of authority nor the weight of reason and argument
>> are as significant as experiment, for thence comes quiet to the mind."
>> R. Bacon
>> "If you don't know what it is, don't poke it."
>> Ghost in the Shell
>>
>>
>> Dr. Don Latham AJ7LL
>> Six Mile Systems LLP
>> 17850 Six Mi

Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Jim Hickstein 

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 dual-coil section.


I'm spending time on this because with low loop voltage the action is so
sluggish that it will barely work or for a clock that's not brand new and
properly oiled may not work at all.


Got it, thanks.  Since I have 4.5V easily obtainable, and a freshly cleaned and 
oiled clock, I may give that a shot first, with or without the 200 ohms.  Then 
I'll know better what you're talking about.


I don't mind if it's a little sluggish.  I just want to keep the thing from 
drifting a minute a week, which is about where I have the pendulum adjusted now. 
 The local temperature variations introduce significant error.  The pendulum 
rod seems to be of wood, without much in the way of temperature compensation. 
But of course, with the setting signal, it didn't need to free-run with high 
accuracy.


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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Brooke Clarke 

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 is so sluggish that it will barely work or for a 
clock that's not brand new and properly oiled may not work at all.


Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html


Jim Hickstein wrote:

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 long time.  Let's see E over I R.)


I measured the setting coil at the terminals: 11.5 ohms.  To limit 125 VDC to 20mA, this would need an additional 6.2 
Kohms.  I suppose that represents the metallic circuit back to WU plus a bunch of other 11.5-ohm clocks on the same 
circuit, plus a compensating resistor back at the head end?


Locally, a D cell (or 3 in series, which I have), with about 200 more ohms, might do.  (Reaches into desk drawer.)  
Let's see if I still have that bunch of 100-ohm resistors left over from making an ISDN terminator.  Why, yes! 
Quarter-watt.  P over I E.  90mW.  Eh, it probably won't blow up.


I tried measuring the winding coil, too: 0.1 ohms, but I'm not sure I was getting it in the right place.  And now I've 
put the face back on the clock. Otherwise I couldn't tell what time it was!  I am really trained to look at that spot 
on the wall for this information.  While the SWCC was in the hospital (for over a year) I had to buy another clock to 
put there.  The blank spot was driving me crazy.


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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Jim Hickstein 

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 
long time.  Let's see E over I R.)


I measured the setting coil at the terminals: 11.5 ohms.  To limit 125 VDC to 
20mA, this would need an additional 6.2 Kohms.  I suppose that represents the 
metallic circuit back to WU plus a bunch of other 11.5-ohm clocks on the same 
circuit, plus a compensating resistor back at the head end?


Locally, a D cell (or 3 in series, which I have), with about 200 more ohms, 
might do.  (Reaches into desk drawer.)  Let's see if I still have that bunch of 
100-ohm resistors left over from making an ISDN terminator.  Why, yes! 
Quarter-watt.  P over I E.  90mW.  Eh, it probably won't blow up.


I tried measuring the winding coil, too: 0.1 ohms, but I'm not sure I was 
getting it in the right place.  And now I've put the face back on the clock. 
Otherwise I couldn't tell what time it was!  I am really trained to look at that 
spot on the wall for this information.  While the SWCC was in the hospital (for 
over a year) I had to buy another clock to put there.  The blank spot was 
driving me crazy.


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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Chris Albertson 
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 grossly per spec'd them because they are used in a
place where there is no heat sink and very little airflow.   I say
"over spec" but yet two burn out.

Funny the seller thought the counter worked.  The burned out digits
were the least significant and with them out you still have a 7
digital counter.  Really all that most people need for aligning radios
and such.

My plan now is to do a parametric search on Digikey/Mouser a quick
search found many for under $1 that could work.  I'll wait 'till I'm
in need of some parts to build my next projects and add a few
transistors.


On Sun, Jan 22, 2012 at 1:07 PM, Stan Searing  wrote:

> on my shelf I'd sell for $50 if you are ever up in San Jose).

If you could drop them at Cal State I might take you up on that.
Yes,  I'll look at that transistor below

> I'd use a 
> MJE171GOS-ND
>  or 
> 497-4829-5-ND
> from
> DigiKey (but as mentioned by others,
> watch the pinout, as most any power tab transistor will have the collector
> in the center,
> while the MPS-U51 is one of the few exceptions).  You might also need to
> slim down
> the leads to fit the PC board.
>
> Stan
>
>
>
>
> On Sun, Jan 22, 2012 at 12:34 PM, Don Latham  wrote:
>
>> 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 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 sequence.  The dead
>> > transistor is the one that controls the all the anodes in the
>> > 7-segment LED module.  The service manual describes the transistor
>> > like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
>> > SI ... FT-50MHZ"
>> > The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
>> > data sheet matches the part that fails so I'm sure I got a correct
>> > cross ref.
>> > I took a photo of the dead transistor.  It is on .1" perf board for
>> > scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
>> > http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1
>> >
>> > I look up the spec in the mps-u51 and see it is a to-220 like case and
>> > can handle 1W.  I'm really surprised it burned out as I doubt an LED
>> > requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
>> > see it has a low saturation voltage.  Maybe that is why the selected
>> > it as it is being driven by 7400 TTL logic that goes through a
>> > connector and has some resistors involved.
>> >
>> > Question:  These seem to be hardtop find.  Can anyone suggest a good
>> > sub"
>> >
>> >
>> >
>> > Thanks,
>> > Chris Albertson
>> > Redondo Beach, California
>> >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com
>> > To unsubscribe, go to
>> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>> >
>>
>>
>> --
>> "Neither the voice of authority nor the weight of reason and argument
>> are as significant as experiment, for thence comes quiet to the mind."
>> R. Bacon
>> "If you don't know what it is, don't poke it."
>> Ghost in the Shell
>>
>>
>> Dr. Don Latham AJ7LL
>> Six Mile Systems LLP
>> 17850 Six Mile Road
>> POB 134
>> Huson, MT, 59846
>> VOX 406-626-4304
>> www.lightningforensics.com
>> www.sixmilesystems.com
>>
>>
>>
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
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-- 

Chris Albertson
Redondo Beach, California

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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Brooke Clarke 

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 resistor was used to set the loop current.
It's amazing how much snappier the sync action is when the loop resistance is raised, i.e. shorter time constant/higher 
loop voltage.
I think something like a throwaway camera flash circuit could be charged up maybe a minute before the top of the hour 
and then dumped into the sync coil a few (TBD) ms prior to the exact top of the hour.


Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html


Jim Hickstein wrote:

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 description of the driving circuit.


I hate to pay twenty bucks for a PDF, or to pay twenty bucks just to find out. 
If it's anything like this:

http://electric-clocks.com/SWCC/

... it doesn't say.  The winding battery, and the setting signal, were supplied, and the installer didn't need to know 
the specs.  But, then again, I can't afford to experiment too broadly and damage my museum piece.  I think the guy who 
recently cleaned and repaired the movement tested this coil.  I'll call him back and ask what he put on it.



In extremis, measure or estimate the coil wire size and calculate the
heat loss for the actuated time with the voltage you want to use.
Don


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Re: [time-nuts] Thunderbolt GPS TimeKeeper

2012-01-22 Thread Chris Albertson 
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 
> 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 
> software on a spare PC that is not connected to  my network, same results. Is 
> there a fix somewhere or am I overlooking something obvious?
> Regards, Dennis WD8DCJ
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-- 

Chris Albertson
Redondo Beach, California

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Re: [time-nuts] Thunderbolt GPS TimeKeeper

2012-01-22 Thread Paul F. Sehorne 
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 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 software on a 
spare PC that is not connected to  my network, same results. Is there a fix 
somewhere or am I overlooking something obvious?
Regards, Dennis WD8DCJ
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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Bob Camp 
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 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  wrote:
> 
>> 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 afraid to try 6V, having read somewhere (probably Brooke's pages) not
>> to exceed 3V lest one damage something.  Then again, that's the local
>> battery, not the setting signal.  (No. 6 dry cell?  Dear me, I hadn't even
>> thought of one of those for 40 years.)
>> 
>> When will we see a pix of this unit??
 
>>> 
>>> It's my day off. :-)
>>> 
>> 
>> Then again, what's a day off for, if not this kind of thing?
>> 
>> http://www.flickr.com/photos/**jxh1/tags/clock/
>> 
>> Brooke Clarke's pix are nice, but I think I have the nicest SWCC clock out
>> there, one of the nicest I've seen.  Coincidentally, I bought it in about
>> 1986 from a fellow named Clark (last name I don't recall), who was a member
>> of the Minnesota horological society, or whatever it's called.  A friend of
>> mine, another member, put me on to this, and I jumped at it.  (Actually, he
>> has an even nicer one, a big Air Force unit IIRC that's about 6 feet tall,
>> and with a mercury pendulum bob.)  Took the thing back home to California,
>> and it came with me when I moved back to Minnesota in 2003.  It's been the
>> primary time display in my house since I got it.  I also still keep the
>> Textronix carton I scrounged, that's a perfect fit, for moving it.
>> 
>> -Jim
>> K6JXH/0
>> 
>> __**_
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/**
>> mailman/listinfo/time-nuts
>> and follow the instructions there.
>> 
> ___
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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Jim Hickstein 

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 description of the driving circuit.


I hate to pay twenty bucks for a PDF, or to pay twenty bucks just to find out. 
If it's anything like this:


http://electric-clocks.com/SWCC/

... it doesn't say.  The winding battery, and the setting signal, were supplied, 
and the installer didn't need to know the specs.  But, then again, I can't 
afford to experiment too broadly and damage my museum piece.  I think the guy 
who recently cleaned and repaired the movement tested this coil.  I'll call him 
back and ask what he put on it.



In extremis, measure or estimate the coil wire size and calculate the
heat loss for the actuated time with the voltage you want to use.
Don


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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Stan Searing 
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 couple of these you can get a
whole 5328A (I have one or two
on my shelf I'd sell for $50 if you are ever up in San Jose).
I'd use a 
MJE171GOS-ND
 or 
497-4829-5-ND
from
DigiKey (but as mentioned by others,
watch the pinout, as most any power tab transistor will have the collector
in the center,
while the MPS-U51 is one of the few exceptions).  You might also need to
slim down
the leads to fit the PC board.

Stan




On Sun, Jan 22, 2012 at 12:34 PM, Don Latham  wrote:

> 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 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 sequence.  The dead
> > transistor is the one that controls the all the anodes in the
> > 7-segment LED module.  The service manual describes the transistor
> > like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
> > SI ... FT-50MHZ"
> > The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
> > data sheet matches the part that fails so I'm sure I got a correct
> > cross ref.
> > I took a photo of the dead transistor.  It is on .1" perf board for
> > scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
> > http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1
> >
> > I look up the spec in the mps-u51 and see it is a to-220 like case and
> > can handle 1W.  I'm really surprised it burned out as I doubt an LED
> > requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
> > see it has a low saturation voltage.  Maybe that is why the selected
> > it as it is being driven by 7400 TTL logic that goes through a
> > connector and has some resistors involved.
> >
> > Question:  These seem to be hardtop find.  Can anyone suggest a good
> > sub"
> >
> >
> >
> > Thanks,
> > Chris Albertson
> > Redondo Beach, California
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> >
>
>
> --
> "Neither the voice of authority nor the weight of reason and argument
> are as significant as experiment, for thence comes quiet to the mind."
> R. Bacon
> "If you don't know what it is, don't poke it."
> Ghost in the Shell
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread paul swed 
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  wrote:

> 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 afraid to try 6V, having read somewhere (probably Brooke's pages) not
> to exceed 3V lest one damage something.  Then again, that's the local
> battery, not the setting signal.  (No. 6 dry cell?  Dear me, I hadn't even
> thought of one of those for 40 years.)
>
>  When will we see a pix of this unit??
>>>
>>
>> It's my day off. :-)
>>
>
> Then again, what's a day off for, if not this kind of thing?
>
> http://www.flickr.com/photos/**jxh1/tags/clock/
>
> Brooke Clarke's pix are nice, but I think I have the nicest SWCC clock out
> there, one of the nicest I've seen.  Coincidentally, I bought it in about
> 1986 from a fellow named Clark (last name I don't recall), who was a member
> of the Minnesota horological society, or whatever it's called.  A friend of
> mine, another member, put me on to this, and I jumped at it.  (Actually, he
> has an even nicer one, a big Air Force unit IIRC that's about 6 feet tall,
> and with a mercury pendulum bob.)  Took the thing back home to California,
> and it came with me when I moved back to Minnesota in 2003.  It's been the
> primary time display in my house since I got it.  I also still keep the
> Textronix carton I scrounged, that's a perfect fit, for moving it.
>
> -Jim
> K6JXH/0
>
> __**_
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/**
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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[time-nuts] Thunderbolt GPS TimeKeeper

2012-01-22 Thread Dennis Czelusniak 
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 
software on a spare PC that is not connected to  my network, same results. Is 
there a fix somewhere or am I overlooking something obvious?
Regards, Dennis WD8DCJ
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Re: [time-nuts] mixers for frequency measurement

2012-01-22 Thread Magnus Danielson 

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 the instruments measurement limit. 
What you see when you measure is a combination of the instruments 
limitation (the slope) and the actual noise-source curve. The 
intercept-point between them depends on the instruments noise level.
Hence, the instruments measurement limit will dominate for lower taus if 
you have a quiet enough source.



It's more of a practical limitation of getting all those readouts that I wonder 
about.


It is not "all those readouts"! The counters do the averaging inside, giving an 
overall measurement rate of 1/s. the external arming of 1000/s is just for keeping Tau 
exactly at 1s.


OK. Have you measured the dead-times? Unknown or worse, unstable 
dead-time can be a limiting aspect. Dead-time can be compensated, but it 
seems it is an art that gone out of fashion.



I also have another project on a FPGA ongoing with a DDMTD test, but last time 
I tried things I ended up with a tool problem.


I would never claim that FPGAs are bad for time nuts projects in
general but my own experiences (I tried things like programmable
dividers, linear phase comparators and ps TI interval measurements)
with FPGAs have all shown heavy problems because of unwanted
"analogue like" interactions inside the FPGA that are difficult
to deal with since we lack to opportunity to put a blocking C here
ore there inside the FPGA. These effects in the sub nanosecond
region are irrelevant for all other kind of electronics including
VERY fast logic but the can be a disaster for time nuts.


If one beleives that the FPGA is a precision timing by itself, you are 
bound to have problems. It is a handy and programmable lump of logic and 
gates. For precision timing you need a "clean" front-end, but then let 
data-collection and high-speed dataprocessing occur in the FPGA.


For a DDMTD for instance, while the the FPGA does the full function, 
putting a pair of real DFFs up-front will clean things up and the FPGA 
side will only act as a recording device as the timing separation has 
already been done in the front-end.


Cheers,
Magnus

Cheers,
Magnus

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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread David 
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-critical application.  I agree with Brooke Clarke
that a 2N4403 will probably work fine.  If you want something closer
then there are any number of TO-126 and TO-225 transistors like the
MJE170 which will work but again, be careful of the pinout.

On Sun, 22 Jan 2012 10:41:23 -0800, Chris Albertson
 wrote:

>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 sequence.  The dead
>transistor is the one that controls the all the anodes in the
>7-segment LED module.  The service manual describes the transistor
>like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
>SI ... FT-50MHZ"
>The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
>data sheet matches the part that fails so I'm sure I got a correct
>cross ref.
>I took a photo of the dead transistor.  It is on .1" perf board for
>scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
>http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1
>
>I look up the spec in the mps-u51 and see it is a to-220 like case and
>can handle 1W.  I'm really surprised it burned out as I doubt an LED
>requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
>see it has a low saturation voltage.  Maybe that is why the selected
>it as it is being driven by 7400 TTL logic that goes through a
>connector and has some resistors involved.
>
>Question:  These seem to be hardtop find.  Can anyone suggest a good sub"

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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Don Latham 
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 extremis, measure or estimate the coil wire size and calculate the
heat loss for the actuated time with the voltage you want to use.
Don

Jim Hickstein
> 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
> afraid to try 6V, having read somewhere (probably Brooke's pages) not to
> exceed
> 3V lest one damage something.  Then again, that's the local battery, not
> the
> setting signal.  (No. 6 dry cell?  Dear me, I hadn't even thought of one
> of
> those for 40 years.)
>
>>> When will we see a pix of this unit??
>>
>> It's my day off. :-)
>
> Then again, what's a day off for, if not this kind of thing?
>
> http://www.flickr.com/photos/jxh1/tags/clock/
>
> Brooke Clarke's pix are nice, but I think I have the nicest SWCC clock
> out
> there, one of the nicest I've seen.  Coincidentally, I bought it in
> about 1986
> from a fellow named Clark (last name I don't recall), who was a member
> of the
> Minnesota horological society, or whatever it's called.  A friend of
> mine,
> another member, put me on to this, and I jumped at it.  (Actually, he
> has an
> even nicer one, a big Air Force unit IIRC that's about 6 feet tall, and
> with a
> mercury pendulum bob.)  Took the thing back home to California, and it
> came with
> me when I moved back to Minnesota in 2003.  It's been the primary time
> display
> in my house since I got it.  I also still keep the Textronix carton I
> scrounged,
> that's a perfect fit, for moving it.
>
> -Jim
> K6JXH/0
>
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-- 
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com



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[time-nuts] FE-5680 serial command tester

2012-01-22 Thread Scott Newell 
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 locked.  I'd love to see a copy of your 
data and the info from the barcode stickers on the cover.


http://n5tnl.com/time/fe-5680a/control/fe5680_info.exe
http://n5tnl.com/time/fe-5680a/control/fe5680_info.c

From the latest tests on my two working units, I'm pretty sure that 
the 0x61 reply is the unit serial number in asciiz text 
("70716").  0xf0 appears to be some sort of version number in asciiz 
text ("3.4" on all mine).  0x2b is a weird one; it appears to be a 
frequency in asciiz text ("2000" on one unit, ">2000.00" 
on the other!).


Thanks for the help everyone!

--
newell  N5TNL


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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Jim Hickstein 

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 
afraid to try 6V, having read somewhere (probably Brooke's pages) not to exceed 
3V lest one damage something.  Then again, that's the local battery, not the 
setting signal.  (No. 6 dry cell?  Dear me, I hadn't even thought of one of 
those for 40 years.)



When will we see a pix of this unit??


It's my day off. :-)


Then again, what's a day off for, if not this kind of thing?

http://www.flickr.com/photos/jxh1/tags/clock/

Brooke Clarke's pix are nice, but I think I have the nicest SWCC clock out 
there, one of the nicest I've seen.  Coincidentally, I bought it in about 1986 
from a fellow named Clark (last name I don't recall), who was a member of the 
Minnesota horological society, or whatever it's called.  A friend of mine, 
another member, put me on to this, and I jumped at it.  (Actually, he has an 
even nicer one, a big Air Force unit IIRC that's about 6 feet tall, and with a 
mercury pendulum bob.)  Took the thing back home to California, and it came with 
me when I moved back to Minnesota in 2003.  It's been the primary time display 
in my house since I got it.  I also still keep the Textronix carton I scrounged, 
that's a perfect fit, for moving it.


-Jim
K6JXH/0

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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Don Latham 
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 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 sequence.  The dead
> transistor is the one that controls the all the anodes in the
> 7-segment LED module.  The service manual describes the transistor
> like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
> SI ... FT-50MHZ"
> The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
> data sheet matches the part that fails so I'm sure I got a correct
> cross ref.
> I took a photo of the dead transistor.  It is on .1" perf board for
> scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
> http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1
>
> I look up the spec in the mps-u51 and see it is a to-220 like case and
> can handle 1W.  I'm really surprised it burned out as I doubt an LED
> requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
> see it has a low saturation voltage.  Maybe that is why the selected
> it as it is being driven by 7400 TTL logic that goes through a
> connector and has some resistors involved.
>
> Question:  These seem to be hardtop find.  Can anyone suggest a good
> sub"
>
>
>
> Thanks,
> Chris Albertson
> Redondo Beach, California
>
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>


-- 
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com



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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Charles P. Steinmetz 

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 a number of designs in the 
early '70s because they were the fastest medium-power transistors 
available.  We always used them with board-mounted heatsinks (unlike 
the TO-220 case, which uses a lead frame and has sturdy leads, the 
Uniwatt has flimsy wire leads similar to a TO-5/TO-39 package).


Any switching transistor that will handle 1-2A and has an fT in the 
50 MHz range or better should work fine.  Note the EBC 
pinout.  Today, I might replace it with a TO-237 device like the 
2N6726/27/28/29/30 from Central Semi (same free-air power rating as 
U51, same pinout).  But note, same optimistic free-air power spec -- 
I'd use a clip-on heatsink if I couldn't leave my finger on it indefinitely.




These seem to be EOL at this time, but still 
available.  ZTX953/951/753/751 (Diodes, Inc.) and KSA928A (Fairchild) 
are TO-92 devices that also claim high dissipation.  Again, use a heatsink.


Best regards,

Charles









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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread paul swed 
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 of this unit??
>>
>
> It's my day off. :-)
>
>  Regards
>> Paul
>> WB8TSL
>>
>> On Sat, Jan 21, 2012 at 9:25 PM, Brooke Clarke
>>  wrote:
>>
>>  Hi Jim:
>>>
>>> There are a number of options.
>>>
>>> Ken's clock clinic sells what appears to be a No. 6 Battery that has a
>>> synchronization function for the Western Union clocks.
>>> But the problem with it and the drivers for slave clocks is that they use
>>> fairly low voltage circuitry.
>>>
>>> Stock Tickers and Teletype machines are tpically run with loop voltages
>>> in
>>> the 60 to 200 Volt range.
>>>
>>> Have Fun,
>>>
>>> Brooke Clarke
>>> http://www.PRC68.com
>>> http://www.**end2partygovernme**nt.com/**Brooke4Congress.html
>>> <**http://www.**end2partygovernment.com/**Brooke4Congress.html
>>> >
>>>
>>>
>>> Jim Hickstein wrote:
>>>
>>>  I have a Spectracom 8170 in the living room (who doesn't?), and a
 Western
 Union time-service clock, a.k.a SWCC clock -- a nice one, in a
 3-foot-high
 wood case.  I've been watching TV with this combination for years and
 years
 but never got around to feeding a pulse from the 8170 to discipline the
 other one. Now that Western Union no longer provides the service. :-)
  But
 it just begs to be done.

 I did draw up a TTL circuit, once (on a napkin, naturally, which I have
 now misplaced), that could live inside the 8170.  I figured out the
 minimum
 number of inputs needed to detect when the MM:SS LED displays said 00:00
 (for one second).  It would close a relay, which could feed the
 winding-battery power to the hour-set solenoid down a pair of wires
 from 10
 feet away.  But I never built it.

 A little over a year ago the TS clock was getting gummy and free-running
 slower and slower, so I sent it to the clock hospital.  It's back and
 free-running nicely, so maybe it's finally time I did this.  Anyone got
 a
 better idea than my little TTL circuit, on a breadboard inside the 8170?
  I'd like to get it across the rear panel without cutting a new hole,
 if I
 can avoid it.  But maybe the right connector would do.  Another
 time-code
 receiver in the TS clock, e.g. a GPS module that provides a relay
 closure
 for 1 second on the hour (if such exists) might be neater.  But the
 living
 room faces north.

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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread Jim Hickstein 

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 Clarke  wrote:


Hi Jim:

There are a number of options.

Ken's clock clinic sells what appears to be a No. 6 Battery that has a
synchronization function for the Western Union clocks.
But the problem with it and the drivers for slave clocks is that they use
fairly low voltage circuitry.

Stock Tickers and Teletype machines are tpically run with loop voltages in
the 60 to 200 Volt range.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.**end2partygovernment.com/**Brooke4Congress.html


Jim Hickstein wrote:


I have a Spectracom 8170 in the living room (who doesn't?), and a Western
Union time-service clock, a.k.a SWCC clock -- a nice one, in a 3-foot-high
wood case.  I've been watching TV with this combination for years and years
but never got around to feeding a pulse from the 8170 to discipline the
other one. Now that Western Union no longer provides the service. :-)  But
it just begs to be done.

I did draw up a TTL circuit, once (on a napkin, naturally, which I have
now misplaced), that could live inside the 8170.  I figured out the minimum
number of inputs needed to detect when the MM:SS LED displays said 00:00
(for one second).  It would close a relay, which could feed the
winding-battery power to the hour-set solenoid down a pair of wires from 10
feet away.  But I never built it.

A little over a year ago the TS clock was getting gummy and free-running
slower and slower, so I sent it to the clock hospital.  It's back and
free-running nicely, so maybe it's finally time I did this.  Anyone got a
better idea than my little TTL circuit, on a breadboard inside the 8170?
  I'd like to get it across the rear panel without cutting a new hole, if I
can avoid it.  But maybe the right connector would do.  Another time-code
receiver in the TS clock, e.g. a GPS module that provides a relay closure
for 1 second on the hour (if such exists) might be neater.  But the living
room faces north.

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Re: [time-nuts] Spectracom 8170 -> SWCC clock #2

2012-01-22 Thread paul swed 
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 dropping resistor to
> get the desired current.
>
> When driven form say 12 Volts the clock response is sluggish, but when
> driven from higher voltages the response is very snappy.
>
> I think a simple blocking oscillator could be used to charge up a photo
> cap and dump it into one or more series connected clocks.
> http://www.prc68.com/I/SWCC.**shtml 
> http://www.prc68.com/I/SWCC2.**shtml 
> http://www.prc68.com/I/SETSC.**shtml#IMP2
> http://www.prc68.com/I/SWCC.**shtml#L
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.**end2partygovernment.com/**Brooke4Congress.html
>
>
> Brooke Clarke wrote:
>
>> Hi Jim:
>>
>> There are a number of options.
>>
>> Ken's clock clinic sells what appears to be a No. 6 Battery that has a
>> synchronization function for the Western Union clocks.
>> But the problem with it and the drivers for slave clocks is that they use
>> fairly low voltage circuitry.
>>
>> Stock Tickers and Teletype machines are tpically run with loop voltages
>> in the 60 to 200 Volt range.
>>
>> Have Fun,
>>
>> Brooke Clarke
>> http://www.PRC68.com
>> http://www.**end2partygovernment.com/**Brooke4Congress.html
>>
>>
>> Jim Hickstein wrote:
>>
>>> I have a Spectracom 8170 in the living room (who doesn't?), and a
>>> Western Union time-service clock, a.k.a SWCC clock -- a nice one, in a
>>> 3-foot-high wood case.  I've been watching TV with this combination for
>>> years and years but never got around to feeding a pulse from the 8170 to
>>> discipline the other one. Now that Western Union no longer provides the
>>> service. :-)  But it just begs to be done.
>>>
>>> I did draw up a TTL circuit, once (on a napkin, naturally, which I have
>>> now misplaced), that could live inside the 8170.  I figured out the minimum
>>> number of inputs needed to detect when the MM:SS LED displays said 00:00
>>> (for one second).  It would close a relay, which could feed the
>>> winding-battery power to the hour-set solenoid down a pair of wires from 10
>>> feet away.  But I never built it.
>>>
>>> A little over a year ago the TS clock was getting gummy and free-running
>>> slower and slower, so I sent it to the clock hospital.  It's back and
>>> free-running nicely, so maybe it's finally time I did this.  Anyone got a
>>> better idea than my little TTL circuit, on a breadboard inside the 8170?
>>>  I'd like to get it across the rear panel without cutting a new hole, if I
>>> can avoid it.  But maybe the right connector would do.  Another time-code
>>> receiver in the TS clock, e.g. a GPS module that provides a relay closure
>>> for 1 second on the hour (if such exists) might be neater.  But the living
>>> room faces north.
>>>
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>>>
>>>
>>>
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Re: [time-nuts] Spectracom 8170 -> SWCC clock

2012-01-22 Thread paul swed 
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.
>
> Ken's clock clinic sells what appears to be a No. 6 Battery that has a
> synchronization function for the Western Union clocks.
> But the problem with it and the drivers for slave clocks is that they use
> fairly low voltage circuitry.
>
> Stock Tickers and Teletype machines are tpically run with loop voltages in
> the 60 to 200 Volt range.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.**end2partygovernment.com/**Brooke4Congress.html
>
>
> Jim Hickstein wrote:
>
>> I have a Spectracom 8170 in the living room (who doesn't?), and a Western
>> Union time-service clock, a.k.a SWCC clock -- a nice one, in a 3-foot-high
>> wood case.  I've been watching TV with this combination for years and years
>> but never got around to feeding a pulse from the 8170 to discipline the
>> other one. Now that Western Union no longer provides the service. :-)  But
>> it just begs to be done.
>>
>> I did draw up a TTL circuit, once (on a napkin, naturally, which I have
>> now misplaced), that could live inside the 8170.  I figured out the minimum
>> number of inputs needed to detect when the MM:SS LED displays said 00:00
>> (for one second).  It would close a relay, which could feed the
>> winding-battery power to the hour-set solenoid down a pair of wires from 10
>> feet away.  But I never built it.
>>
>> A little over a year ago the TS clock was getting gummy and free-running
>> slower and slower, so I sent it to the clock hospital.  It's back and
>> free-running nicely, so maybe it's finally time I did this.  Anyone got a
>> better idea than my little TTL circuit, on a breadboard inside the 8170?
>>  I'd like to get it across the rear panel without cutting a new hole, if I
>> can avoid it.  But maybe the right connector would do.  Another time-code
>> receiver in the TS clock, e.g. a GPS module that provides a relay closure
>> for 1 second on the hour (if such exists) might be neater.  But the living
>> room faces north.
>>
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>> mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
>>
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>
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[time-nuts] Sold: Tek DC510 TM500 Counter (parts or repair)

2012-01-22 Thread Oz-in-DFW 
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 pics at http://www.ozindfw.net/sell/DC510/
>
> $50 or best offer +$15 shipping in US.  International shipping is
> available, but you'll cover all costs, fees, and tariffs.
-- 
mailto:o...@ozindfw.net
Oz
POB 93167 
Southlake, TX 76092 (Near DFW Airport) 





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Re: [time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread Brooke Clarke 

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 a working transistor and look at the base, emitter and collector voltages, what do 
you see?

If there's a resistor in series with the LED segments what's the voltage across 
it doing?

The mux speed for an LED display is fairly slow so any PNP transistor that can handle the voltages and currents involved 
should work.

Have you tried any jelly bean PNPs like the PN2907, 2N3906, 2N4403?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html


Chris Albertson wrote:

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 sequence.  The dead
transistor is the one that controls the all the anodes in the
7-segment LED module.  The service manual describes the transistor
like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
SI ... FT-50MHZ"
The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
data sheet matches the part that fails so I'm sure I got a correct
cross ref.
I took a photo of the dead transistor.  It is on .1" perf board for
scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1

I look up the spec in the mps-u51 and see it is a to-220 like case and
can handle 1W.  I'm really surprised it burned out as I doubt an LED
requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
see it has a low saturation voltage.  Maybe that is why the selected
it as it is being driven by 7400 TTL logic that goes through a
connector and has some resistors involved.

Question:  These seem to be hardtop find.  Can anyone suggest a good sub"



Thanks,
Chris Albertson
Redondo Beach, California

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[time-nuts] FS: Tek DC510 TM500 Counter (parts or repair)

2012-01-22 Thread Oz-in-DFW 
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 offer +$15 shipping in US.  International shipping is
available, but you'll cover all costs, fees, and tariffs.

-- 
mailto:o...@ozindfw.netOz
POB 93167 Southlake, TX 76092 (Near DFW Airport)




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[time-nuts] HP5328A LEDS driver transistor

2012-01-22 Thread 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 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 sequence.  The dead
transistor is the one that controls the all the anodes in the
7-segment LED module.  The service manual describes the transistor
like this:  "part number = 1853-0326", "description = TRANSISTOR PNP
SI ... FT-50MHZ"
The p/n 1853-0326 cross references to a Motorola MPS-U51.  The MPS-U51
data sheet matches the part that fails so I'm sure I got a correct
cross ref.
I took a photo of the dead transistor.  It is on .1" perf board for
scale.   You can read the "3-326" p/n and see the Motorola "M" logo.
http://www.dropbox.com/gallery/28915695/1/HP5328A?h=da35c1

I look up the spec in the mps-u51 and see it is a to-220 like case and
can handle 1W.  I'm really surprised it burned out as I doubt an LED
requires 1W even if showing an "8".  Reading the mps-u51 spec sheet I
see it has a low saturation voltage.  Maybe that is why the selected
it as it is being driven by 7400 TTL logic that goes through a
connector and has some resistors involved.

Question:  These seem to be hardtop find.  Can anyone suggest a good sub"



Thanks,
Chris Albertson
Redondo Beach, California

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Re: [time-nuts] Things to look for when buying a few FE-5680A's?

2012-01-22 Thread Chris Albertson 
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 different type FE5380 that can be
programed over a very wide range of several MHz.   I think these are
still being sold on eBay but not for $40.  They seem to be over $100.

Which is which and how to tell?   Just look at the price.

On Sat, Jan 21, 2012 at 9:59 PM, Brad Stockdale  wrote:
> All,
>
>   I've been on the sidelines of being a time nut for a while now and I'm
> working on getting back into things. Before I drifted away from my hobbies,
> I remember the FE-5680's being around, but I didn't know much about them and
> was more interested in GPSDO's. I think I'd like to help kickstart my
> interest in the area again by picking up a few FE-5680A's from eBay. So, I
> was wondering if there's any certain things I should look for when buying
> some...
>
>   It looks like there's a pretty consistent supply right now on eBay... Are
> there certain sellers that people would recommend?
>
>   I noticed that Option 2 is the RS-232C stuff. Do most on eBay have this
> option?
>
>   Anything in particular I should watch out for?
>
> Thanks,
> Brad
>
>
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-- 

Chris Albertson
Redondo Beach, California

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[time-nuts] Optimax CA-1008 anyone?

2012-01-22 Thread Sam 
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] Optimax CA-1008 anyone?

2012-01-22 Thread Rob Kimberley 
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.

Thanks.

Rob Kimberley




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Re: [time-nuts] TimeLab and HP53132A

2012-01-22 Thread Timeok 

> 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 you see
new
> data coming across at one line per second, or one line every two seconds?
R: when in standard HP53132A mode in monitoring mode I have an incoming data
line every second as have to be. 

Luciano

Luciano P. S. Paramithiotti
IZ5JHJ


- Original Message 
From: John Miles 
To: 'Timeok' , 'Discussion of precise time and frequency
measurement' , 'Azelio Boriani'

Subject: RE: [time-nuts] TimeLab and HP53132A
Date: Jan 21, 2012 11:27 PM

> > > Do you have some experience with TimeLab connected with a TIC
> > HP53132A?
> > > My trouble is as follow:
> > >
> > > using the default setup and acquiring for 1 hour, I can see on
display
> the
> > > graph vary (as magnitude)every 1 second count, like the event
counter
> > each
> > > second up to 3600,but the x (time) display show 1800 seconds as
total
> > > acquisition time over a real 3600 seconds spent.
> > >
> > > Looking the graphic when I start the acquisition I can see a
shape
> > > modification every second but the time axis advance only 1
second every
> > two
> > > real seconds.
> > >
> > > This happen also with the newest verson of Time Lab.
> 
> Including the very newest ones from the past couple of weeks?  Are you
using
> the talk-only option, or the Acquire->HP 53131... option that I just
added
> recently?
> 
> When you use the 'Monitor' button in the acquisition dialog, do you see
new
> data coming across at one line per second, or one line every two seconds? 
> 
> -- john
> 
> 



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