I have the schematic of the 05061-6198 and 05061-6199 which are the power
supply board for the 10811 and the frequency divider and amplifier used in
the 5061B that essentially serves the same purpose, I think. The original
105B and 5061A used the same 5 MHz oscillator and the later 5061A's and
The heat sink requirements are in the LPRO manual that is available on the
net. My recollection is that the sink would require fins unless it was
monstrously thick. The requirement is to keep the base plate less than 70
degrees C and the manual says this will require a heat sink with a thermal
Amazing images.
Thanks for the effort.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Brian Kirby
Sent: Wednesday, September 16, 2009 2:23 PM
To: precise time
Subject: [time-nuts] HP 5065A Manual
I purchased a original HP 5065A
I tried to find them but couldn't.
Do you have an item number?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of ewkeh...@aol.com
Sent: Tuesday, September 01, 2009 12:47 PM
To: time-nuts@febo.com
Cc: bbsha...@hotmail.com
Subject:
if the above gets mangled)
TTFN,
Peter (G8ZZR, London, England)
On Wed Sep 2 7:44 , 'J. L. Trantham' jlt...@worldnet.att.net sent:
I tried to find them but couldn't.
Do you have an item number?
Joe
-Original Message-
From: time-nuts-boun...@febo.com
[time-nuts-boun
Thanks for the response.
It sounds as if the mod should, therefore, have no effect on the front panel
reading. The fact that it does suggests that the problem might be in the
05061-91329 since the unit appears to operate appropriately. There are some
tantalum caps on the board. I'll start with
I recently purchased a 5065A that did not work but was 'fixed' by unseating
all the PC cards and reseating them. I was quite dirty to start with
though.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stan
Sent: Saturday, August
Actually, 'IT' was quite dirty to start with.
I try to stay clean.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. L. Trantham
Sent: Saturday, August 29, 2009 11:16 PM
To: 'Discussion of precise time and frequency measurement
I recently acquired a 5061A (with a digital LED clock) reportedly in
non-operating condition that has two additional connectors on the back
labeled 'Monitor Output' and 'Alarm Output'. In addition, there is a
printed circuit card about 3/4 as long as the A17 board and sitting on top
of the A17
Can anyone provide any information on the usefulness of the Phase Noise
Utility program (85671A) for the HP 8560 series Spectrum Analyzers?
Thanks in advance,
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bruce Griffiths
Sent:
Are you just seeing the transient as it reaches a new equilibrium of
temperature after which it would reduce to a background drift rate or is
this the observation after it has stabilized?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
I have done this and I am not sure I can tell the 'direction of rotation'.
I can easily tell if it reverses but once going, I can't tell which
direction.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. Forster
Sent: Monday,
Does anyone have a copy of this page of the 5061B Operating and Service
Manual, HP part number 0561-9078?
Thanks,
Joe
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and
If you want a 'vintage' solution, the HP 5087A can be configured to take a
single 5 or 10 MHz and divide/multiply it to 10 MHz, 5 MHz, 1 MHz and even
0.1 MHz then feed that to various output amplifiers of 10, 5, 1 or 0.1 for
up to 12 total outputs of your configuration. However, you might be
106B or 105B?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Jim Palfreyman
Sent: Tuesday, July 28, 2009 8:56 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Service manual for HP 106B Quartz
Does anyone know of a source for a power cord for the 5061A (or 5061B,
5065A, etc.)? I am looking for 3 cords or the connector that mates with AC
connector on the back.
The AC Cord is HP part number 1251-2457 and the connector that mates with
the connector on the back is a Cannon
Chris,
I, too, am new to the 'time-nuts' but began with the same goal you have of a
stable and accurate bench reference. That said, I now have Thunderbolt's,
Z3816A's, 5061A's, and a 5061B and 5065A.
One of my Thunderbolt's died that I think was due to a switching power
supply powering the
John,
I have a 5061A and 5061B and both have a position on their front panel MODE
switch that is CS OFF. When in this position the CS OVEN is off, the OSC
OVEN is on, the ION PUMP is working and there is signal out (10 MHz, 5 MHz,
1 MHz, 100 KHz, as appropriate) as measured by the CIRCUIT CHECK
Bruce, Pascal, and anyone else,
Stanley Reynolds has hosted my pictures of the unit as well as the
schematic.
The link is here: http://www.n4iqt.com/JLTrantham/85-50/
Hopefully, this will be helpful to someone in the future.
I appreciate all the effort everyone has put into this and it will
Well, I actually did increase the input voltage so that the Oscillator Board
saw 5 VDC instead of about 2.5 VDC and it made little difference in the
output amplitude, perhaps 10% or less. I am sorry, but my 'scientific
method' has not regenerated itself sufficiently to drive me to make careful
What a wealth of new thought. Let me see if I can remember all the
questions asked in prior posts.
First, the unit is Option 004 for the HP5316A and B (and perhaps others)
frequency counter and some information about it can be found in the service
manual here:
I did not realize that this post would generate this much discussion.
While I have a BEE and MSEE, I am a practicing Cardiac Electrophysiologist
and it has been some time since I thought about such issues. I have learned
a lot though from the discussions and as medicine as we know it winds
The Z3816A and Z3801A are plug and play with 4 LED status lights on the
front panel including GPS Lock. I have the Thunderbolt and a Z3816A and
find being able to review the information on the computer is very helpful
including looking for satellite tracking loss, open or shorter antenna
They look like Torx Screws. Not so?
Thanks,
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Rex
Sent: Monday, June 15, 2009 2:33 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A
Pete,
I have purchased units via the 'group buy' and directly from Bob Mokia
(fluke.l). One of the 'group buy' units, powered by the accompanying 'group
buy' power supply, died after being left on for a couple of days (as I
recall). I still have it disassembled in a box in line on my 'to do
have a current probe and oscilloscope it would be useful to look
at the RF current flowing in the crystal, oscillator transistor etc.
Bruce
J. L. Trantham wrote:
Bruce,
I sent you two pictures directly. I hope I did not choke your inbox.
They
were a total of about 6 MB.
If so, I can probably
to revert to measuring the RF voltage across
resistors in the circuit to get some idea of the RF current.
Bruce
J. L. Trantham wrote:
Bruce,
Simple enough suggestion.
Replacement transistors should arrive before the weekend. I will try to
replace the transistors and re-solder all
of the level without oscillation at an oven temperature of
90-100C.
When oscillating the current drawn by the oscillator may increase
slightly, bringing the value closer to that observed.
Bruce
J. L. Trantham wrote:
Well, a little work with a scalpel and a small flat bladed screw driver
and
I was able
J. L. Trantham wrote:
Bruce,
Thanks for your analysis. Is this all in your head or do you use a
computer
program?
Both.
I used LTSpice to check.
If I understand correctly, you are using the term 'buffer' to describe
what
I call the 'Output Board'.
Yes.
If so, then the Output Board
I have an Ovenaire OSC 85-50 10 MHz OCXO that is a frequency reference for a
HP 5316B frequency counter. It oscillates but the output amplitude is about
20 mV.
I would like to try to repair it. It looks like it is sealed with epoxy.
Any suggestions on how to open it other than scraping the
I, too, snagged one of these since it has the reputation of being the
ultimate achievement of crystal oscillator technology with the goal of
building a GPS controlled reference using a Brooks Shera controller card and
a GPS receiver.
Toward that end, since it takes a few minutes for the 1938 to
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Richard (Rick) Karlquist
Sent: Sunday, April 12, 2009 7:57 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 1938 revisited
J. L. Trantham wrote:
I, too, snagged one
Esa,
I am back home now and can't access the amigazone files from my home IP.
Can you provide access?
Thanks,
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Esa Heikkinen
Sent: Monday, March 09, 2009 4:51 PM
To: Discussion of
I tried to view the files on amigazone but was 'denied'.
Any way to get a look? Am I doing something wrong?
I tried with IE 7 and FireFox with no luck.
I have several 10544A's and they all put out a 10 MHz signal but it is sort
of a 'ramp like' wave as viewed on the oscilloscope that looks
I looked at your oscilloscope signal and it looks cleaner than mine but I
looked at mine at a slower sweep and both 50-ohm termination and 1-Megohm
termination.
Can you look at it on the oscilloscope with 50-ohm and 1-Megohm termination
and display several cycles?
I suspect we are seeing the
I have been able to find schematics of the 10544A but not a service manual.
Is there a service manual available?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Bruce Griffiths
Sent: Saturday, March 07, 2009 3:24 PM
To: Discussion
Same for me.
I, also, would like to have another Thunderbolt. I have been very pleased
with the Thunderbolt from the prior group buys.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Predrag Dukic
Sent: Monday, February 23,
Brian,
I had a failure of a TAPR Thunderbolt where the 10 MHz out was present
(though not disciplined and, therefore, not 10.00 MHz on my 5370B
when 'clocked' by another disciplined Thunderbolt) but there was no 1 PPS
and there was no ability to communicate via the serial port.
I have
Jim,
I had a TAPR Thunderbolt connected to the power supply that came with it and
left it on for several days. My location is bothered by various power
spikes and outages.
After one power outage that tripped the circuit breaker to the work shop, I
discovered the Thunderbolt injured (no
I found a pin out of this part but does anyone have a circuit diagram?
It is a 10 MHz OCXO with a daily aging rate of +/- 1 ppb after 72 hours of
operation.
Thanks in advance.
Joe
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Rick,
I have been 'reading the mail' on this discussion and have a somewhat off
topic question. I acquired a 5334B that has a 'noisy' channel C. It
originally did not read when fed a signal. I then adjusted R328, the peak
detector, and then it correctly read the signal. However, when I
I have several of the units and made up a cable to attach 24V power, a
voltmeter, and the 10 MHz output. I watched the 10 MHz on a scope against a
Thunderbolt as an X-Y display. I did this without using a heat sink and it
took about 5 minutes or less for the BITE to indicate lock (going from +5V
I recently uploaded a manual for the 10638A Degausser to KO4BB's website. I
checked this AM and it is available for download.
Joe
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I have an 8657B signal generator that does fine at and above 1030MHz but
below that, the level is uneven and down about 10 to 15 dBm. I have traced
the (or at least a) problem to a defective HET switch, part number
08657-67102, which switches the outputs to the mixer or to the doubler,
depending
I hate buying pieces one at a time. These connectors are used in many
projects having to do with GPSDO's, oscillators, GPS receivers, Brooks
Shera's controller board, etc.
I bought a Molex MXKK-100 'Kit' of parts for about $55 that included a
workable crimp tool that I have used on other
Richard,
Thank you for the gift. It looks like an interesting project and worthy of
a time-nut novice like myself. I will add it to my list of 'to-do's'.
And thank you to all on the list for their very interesting discussions and
renewing my interests in electronics in the past year.
Merry
Amen!
And Merry Christmas and Happy New Year to the entire list.
This is a great group!
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark Sims
Sent: Wednesday, December 24, 2008 7:11 PM
To: time-nuts@febo.com
Subject:
I really enjoy reading the mail on this group, but I thought it was the
'front molecule on the cutting edge'.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of John Miles
Sent: Monday, December 15, 2008 1:15 PM
To: Discussion of
and frequency measurement
Subject: Re: [time-nuts] 5061A Manual
Hi Joe;
I think I have a hard copy I can send you to use or copy if you can't
find a PDF.
Best Wishes;
Thomas Knox
NIST
4475 Whitney Place
Boulder Colorado 80305
1-303-554-0307
[EMAIL PROTECTED]
Quoting J. L. Trantham [EMAIL PROTECTED
Does anyone know of a link to a 5061A Service Manual? I found the
'Temporary Operating Manual' at the Agilent website.
Thanks,
Joe
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Randy,
I use a 'lissajous' figure. I have a Tek 485 scope that permits 'X' input
on channel 1 and 'Y' input on channel 2 and it is a 350 MHz scope. By
choosing the 'X-Y' display, as long as the frequencies are close or have a
common divisor, you can measure (with a stop watch) how long it takes
I have been enjoying this discussion.
Since the original question was the desire to 'compare' the frequency of an
LPRO to a Z3801, it seems that you could consider that from two (at least)
perspectives.
Before I begin, I confess that I am a novice in this arena and please
correct me in any
to be several levels of settings needed in VISTA to get a
COM port
to work through the USB-serial converter.
I tried two different brands of USB-serial converters on my laptop
and both work perfectly well.
I hope this may help you,
Neville Michie
On 27/10/2008, at 4:44 AM, J. L. Trantham
Brooke and Bill,
I purchased a 105B several months ago and my battery pack was dead as well.
It uses 20 size D cells in a 4 X 5 layout with the batteries positive up
alternating with negative up and connected in such a manner that you have
about 2.4 Volts or 0 Volts when measuring from the
Dave,
I have used a Symmetricom 58532A timing antenna ($69 on eBay as I recall, N
connector), a Synergy Systems timing Antenna ($49 on eBay as I recall, TNC
connector) (I think these are the same antenna with different connectors),
an after market 'Garmin GA 29' marine antenna
I did an e..y search for '8640B' and there were parts units as well as bags
of parts and various boards. You might check there.
Joe
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Murray Greenman
Sent: Thursday, September 04, 2008 10:03 PM
To:
When I compared the function of the Thunderbolt to my Z3816A, the number of
tracked satellites was smaller on the Thunderbolt. However, the Signal
Level Mask is set to 4.0 on the Thunderbolt. After I reset it to 1.0, they
tracked the same (and number of) satellites.
This I did with TBoltMon
, KE5FX
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of J. L. Trantham
Sent: Thursday, August 28, 2008 7:39 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Trimble Thunderbolt - Receive Sensistivity
When I compared
Folks,
I, too, had a great weekend.
The Thunderbolt arrived, plugged it in, and it promptly found it's self. I
can't wait to put it to work. Thanks to all (TAPR, time-nuts, etc.) for
their effort on my behalf.
My father (now deceased) collected and repaired clocks for 60 years leaving
my
David,
I am interested in your PCB and frequency divider project. How can I
contact you directly?
Joe ([EMAIL PROTECTED])
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of David C. Partridge
Sent: Tuesday, July 29, 2008 11:12 AM
To: 'Discussion of
Same here.
Joe
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Had
Sent: Monday, July 28, 2008 7:18 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Leap Second Pending
Same here, both T-Bolts have Leap Second
I have been reading this thread with interest since I enjoy resurrecting
'dead' instruments. Two questions though:
1. Since I have been out of the loop for many years, what is an 'MMIC'?
2. The picture suggests some corrosion or oxidation near the coax cable
connection. Has this been cleaned
I, too, have been looking for rack mount ears for similar units (5334B,
3325A, 3335A, 8657A, 5087A, 105B, 8130A, etc.) with no luck.
If there is anyone with a source or another idea of how to accomplish rack
mounting without the HP ears, I would like to hear about it also.
Thanks,
Joe
Scott,
I would be interested in seeing the info.
You can contact me via [EMAIL PROTECTED]
Joe
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Scott A Sybert
Sent: Friday, June 27, 2008 7:57 PM
To: time-nuts@febo.com
Subject: [time-nuts] FS: Brandywine
Bob,
I too feel well behind most everyone here but I am trying to keep up. I am
looking to build a GPSDO as a second reference to my Z3816A. I have been
looking at several possibilities including using a HP 105B as the oscillator
and building a comparator circuit to control the unit (TAPR
There are two styles of rack ears for the 5334B. One is shown in Didier's
picture. The other adds ears to the front panel 'handles' and the two are
not interchangeable. Handles are useful for holding probes, etc., but you
could take them off and add the ears shown in Didier's pictures.
Joe
Roy,
I can't tell for sure from your comment if you need the manual for the 10811
but the manual for the 10811AB is available here: http://www.hparchive.com/
I think you might already know of this site but just in case.
Joe
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL
I have acquired an HP 105B and have found it to be very stable and to have
an electronic frequency control.
Two questions:
1. Does anyone know of a source for a service manual or schematic?
2. Does anyone have any experience using it as the OCXO in a GPSDO system?
I would think it might work
I have acquired a HP 5087A that I plan to use to distribute the 10 MHz
output of my HP Z3816A GPSDO and was wondering if anyone had a manual or any
other information on the unit.
Also, does anyone have a manual on the Z3816A?
Thanks,
Joe
___
I am a 'newbie' but I would like to have one as well.
Please let me know what I need to do.
Thanks,
Joe
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Arnold Tibus
Sent: Monday, May 05, 2008 8:12 AM
To: Discussion of precise time and frequency
I have truly enjoyed 'reading the mail' on this group.
However, I need some help or a 'refresher' on the lingo.
I am a Clinical Cardiac Electrophysiologist but in a bygone millennium, I
received a BEE and a MSEE from Georgia Tech before I went to Medical School.
'tau'?
Thanks,
Joe
WB4BPP
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