Hi all,
For sale Tracor 527E frequency difference meter. Accept 1,5,10 Mhz perfectly
working come with manual copy.One front handle is missing. Price 350,00 Euros
Shipping from Italy not included. Paypal account or Poste Pay if in Italy. If
interested replay writing your personal email
On Tue, 27 Jul 2010 09:08:49 am Chuck Harris wrote:
I suppose that you could always cheat? Since you know where the
transmitter is going to be, if you could get a timenut near to the
transmitter to give you a beacon to measure 24hrs prior to the event,
you could use the diurnal variations
5061A opt 3 and opt 4
Ebay# 290458191620
Not mine but wish it was.
Mark
VK2HMC
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I've enjoyed the description. Particularly the These atoms are
processed is such a way that they become an atomic frequency standard
:) Also the history section... and the characteristics (Frequency
Accuracy: +/-5 ppm --- a little bad for a cesium, right? ;) or
Frequency Range: 300KHz – 1.5GHz
it is funny. But maybe those options did turn it into a network analyzer.
Powers up untested $1300 AU. Well thats a great gamble for those with spare
cash.
On Tue, Jul 27, 2010 at 9:03 AM, Javier Herrero jherr...@hvsistemas.eswrote:
I've enjoyed the description. Particularly the These atoms are
On 27/07/2010 11:16 PM, paul swed wrote:
it is funny. But maybe those options did turn it into a network analyzer.
Powers up untested $1300 AU. Well thats a great gamble for those with spare
cash.
On Tue, Jul 27, 2010 at 9:03 AM, Javier Herrerojherr...@hvsistemas.eswrote:
I've enjoyed the
Has anybody on the list interfaced a Fury GPS controller to a rubidium ?
If you have, please advise the rubidium are using and your SERV:DACG ,
SERV:EFCS , and SERV:EFCD settings.
I am working with a FRS-C at the moment and I have not found the right
combination to get a stable lock.
Here: www.n4iqt.com/picticii/assembled
I think it would be possible to use the side adjust square trimmers but not the
rectangular ones as they are too big and the holes would be too far apart to
mount them close to the board. The top adjust would be the first choice because
they would be
Hi,
Is the manual for the 527E or for the 527A? AFAIK, the difference is only
1 card but there are no drawings of that card available.
It would be a real public service to scan or copy it before selling your
unit.
If you have a real 527E manual copy, please contact me off-list.
Thanks,
-John
Board received 7/26/10, nice looking board, thanks for the order.
Regards,
Bob Martinson
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stanley Reynolds
Sent: Tuesday, July 20, 2010 6:08 PM
To: time-nuts@febo.com
Subject: [time-nuts]
Kia Ora Brice,
On 27/07/2010, Heathkid heath...@heathkid.com wrote:
Yes, the FEI 5680A's I got are programmable from 1Hz to 20MHz (SMA output /
currently set to 10MHz) plus has the RS232 for programming and one of those
pins (besides the Rb lock pin that goes low and I've got a LED on it) has
with a cal lab for defence department contracts
Or maybe they don't have the ability to check for output :-)
On Tue, Jul 27, 2010 at 7:04 AM, swingbyte swingb...@exemail.com.au wrote:
On 27/07/2010 11:16 PM, paul swed wrote:
it is funny. But maybe those options did turn it into a network
You might want to look at this link for useful info on the 5680A,
http://www.qsl.net/zl1bpu/PROJ/Ruby.htm, and right down the bottom of
this link, http://www.redrok.com/misc1.htm.
73 de Steve
On 28/07/2010, Steve Rooke sar10...@gmail.com wrote:
Kia Ora Brice,
On 27/07/2010, Heathkid
Hi,
I confirm the manual is for the E model.I will scan it.I hope will be ready
next week.
Luciano
Luciano P. S. Paramithiotti
IZ5JHJ
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of J. Forster
Sent: martedì 27 luglio 2010 16.32
To:
I own one RACAL-DANA 1992 (Standard- TCXO). I purchased one with the
Option 04E on eBAY.
The 04E chassis is sealed and the internal OCXO overheats due to lack
of cooling air. This causes the counter to stop taking measurements. I had to
add ventilation holes on the top
Strange, there is no mention of the need to add ventilation when you
upgrade to ocxo in the service manual.
Steve
On 28/07/2010, bill...@aol.com bill...@aol.com wrote:
I own one RACAL-DANA 1992 (Standard- TCXO). I purchased one with
the Option 04E on eBAY.
The 04E
bill...@aol.com wrote:
I own one RACAL-DANA 1992 (Standard- TCXO). I purchased one with the
Option 04E on eBAY.
The 04E chassis is sealed and the internal OCXO overheats due to lack
of cooling air. This causes the counter to stop taking measurements. I had to
add
I have done this with several LPRO-101, X72, and a FRS-C. The FRS-C
that I used was out of a Lucent RFG-RB box. It had a hot TTL output
that was causing issues with the Fury, The level was the problem, not
the ttl. The EFC was hypersensitive, and it took a long time for the
unit to settle
Luciano,
When you get it scanned I will be happy to host
it on the www.to-way.com Web site.
Hadley
K7MLR
h...@to-way.com
At 08:01 AM 7/27/2010, you wrote:
Hi,
I confirm the manual is for the E model.I will
scan it.I hope will be ready next week.
Luciano
Luciano P. S. Paramithiotti
I have both the 527A and 527E manuals already scanned if you want them. My
527E is missing the info one he one card that is different between the
models. Luciano and I are trying to work that out now.
Best,
-John
===
Luciano,
When you get it scanned I will be happy to host
it
Are you sure that the OCXO is failing? I bought two 1992s. One was
basically dead. A custom IC (U39) was running at 90C with no heatsink.
In the working unit U39 was ~60C. One of this chip's functions is to
process the oscillator before it's sent to the 10MHz STD. OUTPUT jack on
the back.
My experience is very similar to Scott's. I ran many hours with both an
LPRO-101
and FE-5680A. The disciplining behavior and Fury settings were the same for
either Rb. My biggest disappointment was the recovery time due to various
common
or intentional bumps or especially, after power loss. I
Thank you all for replying to the post.
Channel C works up to 1,750 MHz on both units. Channel A works up to
220 MHz on both units.
My applications are for GPS L1 at 1575.42 MHz , L2 at 1227.6 MHz, and
L5 at 1176.45 MHz and their corresponding LOs.
I did
Hi guys,
it may help to increase DAC gain to get faster recovery times from bumps
etc.
On an OCXO, the frequency recovery from an upset should happen within a
couple of minutes, definitely less than 15 minutes to achieve frequency lock.
The phase recovery (to 0ns offset) may take a
Could be they can't check but the meter still should work
That would say a lot.
Well to much for me to gamble away.
On Tue, Jul 27, 2010 at 10:53 AM, Pete Lancashire xyzzy...@gmail.comwrote:
with a cal lab for defence department contracts
Or maybe they don't have the ability to check
Said, Did the OEM units (from way back) ship with an open pad for the
thermistor? I thought that wouldn't work unless it was drawing oven
current from the Fury. It would be neat to add some tempco into the mix
instead of just trying to shield it from HVAC cycling. The particular
LPRO-101
I read the article on PID on Wikipedia last night. I do not fully
understand it, but I see/learning some of the relationship.
I did a test on the FRS-C rubidium. The average frequency was 10 000
000.0025 hertz at the rubidium 10 turn dial dial setting of 255, and the
control voltage out of
I read the article on PID on Wikipedia last night. I do not fully
understand it, but I see/learning some of the relationship.
Here's a very quick primer:
Consider a very simple control position servo loop:
Pos. Input --- + (SUM)--- PID --- AMP --- MOTOR = Output Pos
Hi Brian,
based on your measurements, it seems that your unit has a swing of about
0.00566 Hertz per Volt EFC, which is very little.
This compares to about 8Hz per volt for the standard DOCXO's we use.
That's a 1413 to 1 difference in EFC sensitivity between the Rb and the
standard OCXO.
That part I understand (your drawing), its a basic phase lock loop.
What I am having trouble with is the Fury's commands relationship.
The Fury controller has the following SERVO commands to set up the loop:
SERVo:DACG which is the DAC gain, a control voltage range ?
range is 0.1 to 10,000 --
Hi John,
on the Fury, the proportional part you describe is roughly the same as EFC
Scale. The integral part is PHASECO.
Fury can happily run with correct frequency output with PHASECO set to 0,
but the phase offset would be large, and slowly changing over time.
The EFCS (proportional
That part I understand (your drawing), its a basic phase lock loop.
What I am having trouble with is the Fury's commands relationship.
OK. Sorry for the BW.
Basically you tune a loop by starting with the P, I, and D set to zero.
You slowly crank up the P until it starts to become unstable.
Hi Scott,
yes the pads are there, you can use the through-hole pad right next to C67
and a standard ground pad for the Thermistor. There will be 10.5V across
the thermistor. Connect the thermistor to your Rb case.
You should be able to connect two 10K Thermistors in parallel to get a good
Hi John, Brian,
actually we set D to 0, and use P and I gains.
Yes, the DACGAIN is an overall gain of the loop output - to normalize for
different oscillator voltage/frequency sensitivities.
I forgot that the DACGAIN is limited to 10,000, so instead of setting it to
20,000 one can set it
Any particular thermistor you would recommend?
Scott
On 07/27/2010 09:07 PM, saidj...@aol.com wrote:
Hi Scott,
yes the pads are there, you can use the through-hole pad right next to C67
and a standard ground pad for the Thermistor. There will be 10.5V across
the thermistor. Connect
I found that on the FRS-C and the X72 the frequency output was not at
all linear with respect to EFC, which made things worse with large
dacgains. After _MANY_ hours of watching and playing with different
settings, I came to the conclusion that you just need to be patient when
using Fury+Rb,
You really can't expect to be able to tweek a loop without giving it
several time constants (at least) to settle out between changes.
-John
==
I found that on the FRS-C and the X72 the frequency output was not at
all linear with respect to EFC, which made things worse with large
I also noticed on the Fury I had the original firmware in the unit from
when I was bought (Oct 14,2007). I have not had a chance to play with
the unit unit recently.
I reflashed the unit with 1.22 firmware. I noticed in the flash
software I could not select the DEVICE LCP2136, it was
Hi Scott,
this one has about 3K at 60C and 10K at room temp. We used it before with
success. The only problem is having sufficient current go through it to be
above the cut-off threshold of the current sensor. You may have to put
something in parallel to this thermistor, or use a couple in
Hi Scott,
yes, Rb's tend to have many orders of magnitude smaller control ranges than
OCXO's, so it takes longer to phase lock. What's even worse is hysterisis,
eg. we have seen units that jump back and forth between two control
voltage values. This tends to happen in TCXO's and Rbs from
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