I have in the past reversed the varactor, grounding R2 to get a positive
tuning voltage from 1.5 to 12 Volt. Also brought out the 5.7 volt for
reference purposes. That way every thing was positive. Is easy to get to. But
now I have some very good units and I am worried I may change
Hi
If you are going to tear into the unit, lift the 100K (R2) that goes to the
6.4 V reference and bring that out. Ground the existing EFC lead and feed
the new one with a (low) positive voltage.
Bob
-Original Message-
From: time-nuts-boun...@febo.com
John,
Interested. How might you connect the oven controller to what he is seeing?
Bad caps causing it to oscillate, 60 hz modulation, ..
I have a 5065 so am always interested in tid bits that I read.
Thanks
On Fri, Oct 29, 2010 at 12:34 AM, John Miles jmi...@pop.net wrote:
How's the photo
Bob
Thanks that is even better. I did not think of that. I can do that by
swapping the leads at the board interface and stay away from the Osc. circuit
itself. Will try that when I replace the OCXO of my FRK-H with a super
10811.
Bert Kehren
In a message dated 10/29/2010 8:37:13 A.M.
Hal Murray wrote:
How about the crab supernova.
Msec pulsars are much more stable - see http://arxiv.org/pdf/0911.5534 for
some comparisons.
You get frequency from pulsars. I think you need something like a
(super)nova to establish a start-time so you can convert frequency to time
I am working on a project to lock at RFSpace SDR-IQ receiver to a
Trimble Tbolt, using a G4HUP DFS to convert the 10 mHz reference output
to the 66.667 mHz required by the SDR-IQ.
I am looking at the various Tbolt kits on eBay (the ones that include
power supply, antenna, etc). Can anyone
In July I bought this kit from a reliable supplier in China,
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItemitem=290322053618
It arrived in 6 days and I had it up and running within an hour,
and it's been doing a solid job since.
--
Paul Nicholson
--
In message 962ba941c5ca41c19df45f77608ad...@warcon28gz, WarrenS writes:
What is the correct 100 sec Allan value of this low noise 10811 Osc?
All plots are of the same OSC, just different parts of the same data run.
Basically the worst one...
--
Poul-Henning Kamp | UNIX since Zilog Zeus
Hi there,
how can the nominal frequency be 1E+11 Hertz (in other words 0.1
TeraHertz)??
For the 10811A it should be set to 1E+7.
Also, what instrument are you using that gives you xE-13 resolution on
33ms sample rate (30 samples per second at 0.5 parts per trillion resolution)?
bye,
Well, it depends on the conditions -- you'd have to hold the temperature
steady to conclude that, not to mention the reference (which was...?) All
of the runs represent good performance for a 10811.
-- john, KE5FX
-Original Message-
From: time-nuts-boun...@febo.com
looks like this might run...
I would say that all the values are valid , but agree that the overall
confidence in the performance couldn't be better than the worst case. I
have noticed that I never get the same ADEV values on successive runs
but put it down to an undisciplined thermal
Researchers at Fermilab are building a “holometer” so they can disprove
everything you thought you knew about the universe. More specifically, they are
trying to either prove or disprove the somewhat mind-bending notion that the
third dimension doesn’t exist at all, and that the 3-D universe
On 10/29/2010 08:28 PM, WarrenS wrote:
If it is time to come back from all the Dead subjects, I have a time
nut question.
What is the correct 100 sec Allan value of this low noise 10811 Osc? All
plots are of the same OSC, just different parts of the same data run.
None of them is correct, but
Hi Brandon Jordon:
I have spent much time researching GPSDO's,
for my requirements, I came up with the Tbolt,
Many conditions to think about, firmware, who your buying from ect,
the company I chose was Fluke1, this product The
easy kit, Ant, Cable Fittings, a Tbolt that has been rehabbed,
power
It is easer for me to scale the nom freq setting than the data so
I scaled the 1E+7 osc freq by 1e+4, because my raw data is in parts per
1e-11 instead of in Hz.
Gives the same answer either way. I'm using an improved TPLL to take the raw
data, Ulrich's great Plotter program to do the plots.
On 10/29/2010 09:57 PM, mike cook wrote:
looks like this might run...
I would say that all the values are valid , but agree that the overall
confidence in the performance couldn't be better than the worst case.
Which trace is worst? Check the plot again. Look at the green trace. At
0,1 - 20
All of those ADEV curves are awful... send me the oscillator, and I will
dispose of it properly ;-)
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-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Roy Conners
Sent: Friday, October 29, 2010 4:17 PM
To: bcdx@gmail.com; Discussion of precise time and frequency
measurement
Subject: Re: [time-nuts] Trimble Tbolt kits on eBay
Hi
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Roy Conners
Sent: Friday, October 29, 2010 5:36 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Trimble Tbolt kits on eBay
-Original
Sorry for the intrusion. I just want to point out that the seller is
fluke.l, that's a lower case L, not a one.
-Bob
On Fri, Oct 29, 2010 at 2:17 PM, Roy Conners k3...@verizon.net wrote:
Hi Brandon Jordon:
I have spent much time researching GPSDO's,
for my requirements, I came up with the
Well, I've always thought that the reason that there are
quantum dimensions, like the Planck time, is because we
are living in a very high-class computer simulation. There
has to be granularity at some level.
Happy Halloween
Bill Hawkins
-Original Message-
From:
There are a couple of 20 uF axial tantalum electrolytics across the B-C
junctions of the pass transistors for both the lamp and cell heaters. They
were open in my 5065A when I got it, and there was some overheating damage
on the lamp driver PCB. Correlation != causation, but since I'm not sure
On my 5065A, the 2nd harmonic reading jitters between 35 and 40. Not sure if
this is normal or not, but the output seems very stable. The std deviation of
the output time interval on a 5370A clocked by a tbolt is at the limit of the
counter when it is clocking itself.
I recently ordered a Thunderbolt from *yixunhk* on ebay. It arrived from
Hong Kong is 4 (count them 1-2-3-4) days. His kit includes the tbolt, a
brick power supply (no li'l wires coming from a tin box), software, serial
cable, decent high gain antenna and about 20m of coax. Everything but the
The 2nd Harmonic is the only one showing variation
Battery 0
Supply 38
Lamp Oven 25
Cell Oven 23
Osc Oven36
Photo I 31
5 Mhz 18 (loaded)
Control 0.5
Error 0
2nd Harm31
1 Mhz 38 (no load)
100 khz 38
Sorry about that, yes that was a typo,
Have Fun,
Roy K3TEN, 73
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of William H. Fite
Sent: Friday, October 29, 2010 6:36 PM
To: Discussion of precise time and frequency
Has any one characterized the 1 pps output over time against a Maser? I
think it makes an excellent GPS substitute, but actual data would be great.
Thanks Bert Kehren
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Bill Hawkins wrote:
Well, I've always thought that the reason that there are
quantum dimensions, like the Planck time, is because we
are living in a very high-class computer simulation. There
has to be granularity at some level.
Only if you are looking at something. If you aren't looking,
the
I would call this gadget more of a time interval analyzer
than a clock.
Rick Karlquist N6RK
On 10/29/2010 1:01 PM, JULIAN TOPOLSKI wrote:
Researchers at Fermilab are building a “holometer” so they can disprove
everything you thought you knew about the universe. More specifically, they are
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