Hi Paul
Prime question is what are you calling the slave unit?
In normal use Lucent treats the Ref-0 unit as the master and Ref-1 as the
slave, but it's Ref-1 that contains the GPS module. Bit confusing but if
you've got Ref-1 with the GPS module then you're in business:-)
It's turned out
I recently picked up a 5061A surplus, but have no idea whether it works or
not. The first hurdle is getting a power cord, but I'm still waiting for
the proper connector to show up (the first one I ordered had the wrong
orientation on the 3 pins.) In the meantime, I've been reading though what
Hi
On Nov 6, 2014, at 3:44 AM, GandalfG8--- via time-nuts time-nuts@febo.com
wrote:
Hi Paul
Prime question is what are you calling the slave unit?
1) Slave in the sense that it’s slaved to the GPS in the other box. Unless we
find a serial link from the Ref-0 back into the Ref-1, that’s
It is not uncommon that replacement tubes are not the original ones. See here:
http://www.gigatest.net/datum/cesium_tubes.pdf
You can't do anything else than plugging it in and check the various
voltages. If there is any life left in the tube and the ion pump is
working, you can even experience a
Hi
On Nov 6, 2014, at 3:44 AM, GandalfG8--- via time-nuts time-nuts@febo.com
wrote:
Hi Paul
Prime question is what are you calling the slave unit?
In normal use Lucent treats the Ref-0 unit as the master and Ref-1 as the
slave, but it's Ref-1 that contains the GPS module. Bit
Today I got an email about this:
http://www.ti.com/tool/prucape?keyMatch=PRU%20capetisearch=Search-EN
And from there I found this:
http://processors.wiki.ti.com/index.php/PRU_Cape_Getting_Started_Guide
Hope it helps some fellow nuts in their quest for the ultimate
precision/price ratio
Hi Bob
I view the master/slave situation the same way you do, but only commented
because Lucent effectively sets things up the other way round so just
wanted to be sure which way Paul was considering it.
As regards, the faking, yes, a single 15 way plug containing just a link
and a
I agree. Plug it in and see what happens although I would probably disconnect
and remove the NiCd batteries and inspect for and clean up any leakage issues.
I would also remove A2, the battery charger board, until initial tests are
completed. A2 is the center board seen from the bottom.
I
The datum tubes are fairly common as they were significantly less expensive
than HP/Agilent tubes and lasted longer
First thing as JL notes is to remove battery and charger
Just power it up and monitor the ion pump value on the test meter if it drops
to zero fairly rapidly the tube may still
actually all good advice but allow the pump to work for at least 2 weeks
On Thu, Nov 6, 2014 at 8:39 AM, Scott McGrath scmcgr...@gmail.com wrote:
The datum tubes are fairly common as they were significantly less
expensive than HP/Agilent tubes and lasted longer
First thing as JL notes is to
Have a second to type further. If the systems been off for 6 months it will
take a long time for the ion pump to work. Simply watch the current meter
and give it 24 or 48 hours. Its very slow. Even give it a week. If the
current is coming down at all that is a positive sign. It may be quite
small
If after say a week and the current does not go down, there is one more
thing you can do before you have a tube that qualifies as a door stop. You
replace the internal HV supply with 3,500V @ 5 mA I had to do this on mine.
Keep doing it a few minutes at a time, took something like 3 hours.
No drop
Pete thats quite a hint on the official fumes measurement scale.
Frankenstein takes a solid 24 or so hours to your one. So it seems on the
CS scale of life you are fumes and I am wisps. The meter shows just about 0
photo. Very tough to work with have to play games with meter amplifiers and
such.
I just cant figure out what it is ;)
http://www.ebay.com/itm/HP-Agilent-5071A-Primary-Frequency-Standard-/191386439159?pt=LH_DefaultDomain_0hash=item2c8f854df7
One obvious question: Are the leftover parts worth anything close to the
opening bid ?
-George, N2FGX
On 6 November 2014 18:09, xaos x...@darksmile.net wrote:
I just cant figure out what it is ;)
http://www.ebay.com/itm/HP-Agilent-5071A-Primary-Frequency-Standard-/191386439159?pt=LH_DefaultDomain_0hash=item2c8f854df7
One obvious question: Are the leftover parts worth anything close to the
If you have all the required h/w including HP GPIB card signal
analyzer.. a PC with ISA slots.
The original HP 3048A s/w still works very reliably in windows XP on a
core2duo.
WIndows XP (onwards) enforced the direct h/w access rules.
To make this work you need a wrapper program to handle task
I've made the seller offers before, usually takes them. IMake an offer of a
$100 with a note something like Cesium Tube is missing, all the value is
in the tube, making offer for spare parts
They are surplus guys have no idea what the thing is. They have someone
suggesting the TM vaule based on
Hello,
I purchased a used Stanford Research System CG365 clock generator that is
without a printed manual. As SRS's online manuals do not include schematics,
does someone have a link to, or a copy of, the CG635 schematics that they would
share with me?
Thanks!
Kevin
Wow talk about beat to heck and frankly I would stay far away from it.
Regards
Paul
WB8TSL
On Thu, Nov 6, 2014 at 2:16 PM, Pete Lancashire p...@petelancashire.com
wrote:
I've made the seller offers before, usually takes them. IMake an offer of a
$100 with a note something like Cesium Tube is
Pete,
You're right. Nothing to lose. I think I'll go for it.
There are a total of 3 5071's for sale. 2 have problems and the other
one has no pictures of power up, etc. Prob DOA.
Yes follow the manual. You can't really hurt it.
The first position is the pump position and you leave the switch there.
Not much else is really running. Ovens warm and such. Turn the meter to ion
pump and watch. Most likely it may go off scale to the right.
Regards
Paul
WB8TSL
On Thu, Nov 6,
There's a good chance you can get it working but not necessarily with the
built-in ion pump supply. In my experience, if it doesn't pump down within a
day or two, it never will. No point waiting multiple days or weeks. The
manual talks about how to connect an external HV power supply, and I
Hi
Ok, I got to spend a little quality time with my pair today. I mostly poked at
the Diag port with a terminal program.
Both of the units seem talk over the Diag port regardless of the mode they are
in (master / slave / fault ). Both respond to a sub-set of the Z3801 SCPI
commands (= not
3$?
Or is that too much?
Joe
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of xaos
Sent: Thursday, November 06, 2014 12:10 PM
To: Discussion of precise time and frequency measurement
Subject: [Bulk] [time-nuts] There seems to be something missing from
Option 4 is the high performance beam tube which traded shorter life for better
performance. It referred to the original tube shipped with the standard
Not sure about j15
Sent from my iPhone
On Nov 6, 2014, at 5:34 PM, Wayne Holder wayne.hol...@gmail.com wrote:
Thanks for all the great
The only problem with these standards is the tube availability since they have
that neat little rom which allows the standard to recognize the tube.
So using available non-5071 tubes is a challenge unless someone solved the
rom issue
But the first one is pretty beat did someone have a bad
Hi
From the looks of that one, I suspect it fell off the back of a truck. You
aren’t going to send that one back to Beverly and get it re-tubed and repaired
for the flat rate fee.
Maybe Tom took his hiking in the mountains and it slipped out of the harness …
:)
Bob
On Nov 6, 2014, at 8:08
On 11/6/14, 5:08 PM, Scott McGrath wrote:
The only problem with these standards is the tube availability since they have
that neat little rom which allows the standard to recognize the tube.
So using available non-5071 tubes is a challenge unless someone solved the
rom issue
But the first
If you get the tube working, you should use a counter or Lissajous display
with a GPS or rubidium standard to preset it to the correct resonance peak
frequency for lockup. The tube will probably be pretty noisy at first. If
it also has weak beam current, which is common, it will be very
Hi
Could have been retrieved from a dumpster. That would beat anything I’ve found,
but I may not be dumpster diving in the right neighborhoods ….
Bob
On Nov 6, 2014, at 8:24 PM, Jim Lux jim...@earthlink.net wrote:
On 11/6/14, 5:08 PM, Scott McGrath wrote:
The only problem with these
On 11/6/2014 5:29 PM, Bob Camp wrote:
Hi
Could have been retrieved from a dumpster. That would beat anything I’ve found,
but I may not be dumpster diving in the right neighborhoods ….
Bob
On Nov 6, 2014, at 8:24 PM, Jim Lux jim...@earthlink.net wrote:
On 11/6/14, 5:08 PM, Scott McGrath
Most damages are compatible with a truck fall but he BNC connectors are
intentionally destroyed using a screwdriver or the like. For me it
looks like it came from an organization with a policy of destroying the
equipment that is written off. I've seen this kind of things in the
disposal
Wayne,
Forgot to mention this on my first post.
On the front panel:
1. Set the MODE to 'CS OFF'
2. Set OSC FREQUENCY five turn pot to '250' (not COARSE).
3. Set MOD to 'ON'.
4. Set C FIELD to whatever the front door says it should be.
5. Set CIRCUIT CHECK to 'ION PUMP I'.
Plug it in and
If you get the tube working, you should use a counter or Lissajous display
with a GPS or rubidium standard to preset it to the correct resonance peak
frequency for lockup. The tube will probably be pretty noisy at first. If
it also has weak beam current, which is common, it will be very
This seller has three more of these units. They have a GPS disciplined OCXO and
a disciplined Rb Osc. Normal operation used the Rb and fail over to a OCXO.
Each unit has 28 output ports for the 10 MHz and 28 output ports for the 1-PPS
all on the rear. The run on AC or 28 volts DC.
Send a
Correction!
The distribution is configured for 5 MHz, not 10. There is 10 MHz available
on two front panel BNC connectors. However, I think that can change. I'm
looking.
Tom
- Original Message -
From: Tom Miller tmiller11...@verizon.net
To: time-nuts@febo.com
Sent: Thursday,
Hi Bob,
I've been using the Satstat program to send commands. What I don't understand
is why the slave will accept commands such as sat elevation angle and not give
an error response. It gives a response of command complete, but it doesn't
change it. Or is that an indication that both units
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