Richard (Rick) Karlquist wrote:
On 11/23/2012 9:38 AM, Bruce Griffiths wrote:
NIST have shown (at least at 10MHz) that the high level mixers they
tested are noisier than the ZRPD1.
Bruce
Do you have a citation to where they said that?
What you quoted doesn't make sense, at least, out of
Can anyone recommend an inexpensive 12.8 MHz OCXO that outputs a sine
wave? I've looked online, but the only ones I find costs hundreds of
dollars. Anything 0.25 ppm or better is fine. A Vcc of 5-13.8 VDC
preferred.
Joe Gray
W5JG
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time-nuts mailing
With only 0.25ppm needed would a TCXO do?
Howsabout this:
http://www.kuhne-electronic.de/en/products/special-offer/128-mhz-crystal-oscillator-tcxo.html
or
http://www1.futureelectronics.com/doc/IQD%20FREQUENCY%20PRODUCTS/E4191LF.pdf
or even
http://cgi.ebay.com/310376642284
Dave
Le 24 nov. 2012 à 09:26, Joseph Gray a écrit :
Can anyone recommend an inexpensive 12.8 MHz OCXO that outputs a sine
wave? I've looked online, but the only ones I find costs hundreds of
dollars. Anything 0.25 ppm or better is fine. A Vcc of 5-13.8 VDC
preferred.
An uncommon OCXO freq. If
Hi Joe,
I can offer you from our stock at AXTAL the following excellent:
- OCXO 12.8 MHz in 20x20 mm package HCMOS, 5 V, stability +-10 ppb, as our
AXIOM30-50-10, but with reference voltage output of 4 V (instead of 3 V).
Frequency can be tuned by using the VREF.
See www.axtal.com for details
Bruce Griffiths wrote:
Richard (Rick) Karlquist wrote:
On 11/23/2012 9:38 AM, Bruce Griffiths wrote:
NIST have shown (at least at 10MHz) that the high level mixers they
tested are noisier than the ZRPD1.
Bruce
http://tf.boulder.nist.gov/general/pdf/2556.pdf
Where all the high level
David,
Thanks for the links, but none of those meet my 0.25 ppm requirement.
Joe Gray
W5JG
On Sat, Nov 24, 2012 at 1:55 AM, David C. Partridge
david.partri...@perdrix.co.uk wrote:
With only 0.25ppm needed would a TCXO do?
Howsabout this:
Mike,
Surprisingly, it isn' as uncommon as I first thought. The problem
seems to be the cost, however. If I can't find something within my
budget, I'll have to improvise.
Joe Gray
W5JG
On Sat, Nov 24, 2012 at 1:53 AM, mike cook mc235...@gmail.com wrote:
Le 24 nov. 2012 à 09:26, Joseph Gray a
Bernd,
Thanks for the offer. However, I am trying to do my project as
inexpensively as possible. I was hoping to find something suitable for
less than $50, or perhaps a used OCXO on ebay for less.
Joe Gray
W5JG.
On Sat, Nov 24, 2012 at 7:38 AM, Bernd Neubig bneu...@t-online.de wrote:
Hi Joe,
Joe do you have a model number I have a C-Mac data book for this company and
they have a wide variety of packages
Alan
G3NYK
- Original Message -
From: Joseph Gray jg...@zianet.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Saturday, November
Hi Chris,
I'm sure they're leaking pretty badly, but it's not enough to bother
my normal usage. My other receivers do not hear my standards even
though they are in the same rack, but the Heathkit does, even with an
outside antenna. The Heathkit's front end is not shielded worth
beans as it
Joe the reason why its not so uncommon may not be obvious in the US :-))
12.8MHz is used as a reference for commercial and amateur PLLs in Europe
where the common channel spacing is 12.5kHz (/1024) or 6.25kHz (/2048). This
may mean that 12.8MHz oscillators may be more easily found in Europe ??
On 11/24/12 8:28 AM, Alan Melia wrote:
Joe the reason why its not so uncommon may not be obvious in the US :-))
12.8MHz is used as a reference for commercial and amateur PLLs in Europe
where the common channel spacing is 12.5kHz (/1024) or 6.25kHz (/2048).
This may mean that 12.8MHz oscillators
I received a 'programmable' FE-5680A from nichegeek recently and I'm able
to get it to lock (pin 3 goes low) and produce a PPS output (pin 6).
However, it never produces a 10MHz output on pin 7.
Is this unit defective, or is there something I might be doing wrong?
My unit is labeled: FE-5680A UN
I have a similar unit that I picked up a few years ago. It only has a 1
PPS output. That's the way it was designed. There are so many
different versions of this stupid model that it's impossible to be sure
what you're buying until you get it on your bench.
If yours is like mine, the DDS is
Alan,
My friend only sent me what I posted. However, he emailed me this
morning and said that he has what he needs now. Thanks to those who
replied.
Joe Gray
W5JG
On Sat, Nov 24, 2012 at 9:11 AM, Alan Melia alan.me...@btinternet.com wrote:
Joe do you have a model number I have a C-Mac data
Wanted: microwave counter. Must go to at least 18 GHz.
For trade: HP 5335a. Working. HPIB, Enhanced HPIB triggering options,
etc.. Depending on unit cash can be part of the trade. Pics and other
docs, drop me a note.
73 de Norm n3ykf
___
time-nuts
You might want to ask on the EIP_Microwave Yahoo Group. EIP made some of
the best microwave counters ever.
-John
=
Wanted: microwave counter. Must go to at least 18 GHz.
For trade: HP 5335a. Working. HPIB, Enhanced HPIB triggering options,
etc.. Depending on unit cash can be
Rick Karlquist wrote:
Bruce Griffiths wrote:
Richard (Rick) Karlquist wrote:
On 11/23/2012 9:38 AM, Bruce Griffiths wrote:
NIST have shown (at least at 10MHz) that the high level mixers they
tested are noisier than the ZRPD1.
Bruce
I have a working EIP 371 that is surplus to my needs. It has the interesting
source locking feature (described on my web site)
Didier KO4BB
Sent from my Droid Razr 4G LTE wireless tracker.
-Original Message-
From: Lizeth Norman normanliz...@gmail.com
To: time-nuts@febo.com
Sent: Sat,
Greetings. I recently acquired two Z3805A gpsdo's from the usual auction
site. (These units look like a Z3801.)
Does any one know the specified output level for the 1pps signals or have a
high confidence measurement of the output voltage that they could share with me
? (Measuring fast rise
Ahh.
Small lot w/ antenna restrictions here, so my main antenna is a inverted
L 35ft from my second floor shack. Means that any leakage that can be
detected in the shack with a small loop at 4 feet can be easily heard on
the main antenna.
So, filters and ferrite chokes on everything, LMR240,
Didier,
What are you asking? Trade+ cash?
73 de Norm
On Sat, Nov 24, 2012 at 3:50 PM, shali...@gmail.com wrote:
I have a working EIP 371 that is surplus to my needs. It has the interesting
source locking feature (described on my web site)
Didier KO4BB
Sent from my Droid Razr 4G LTE
Mark,
Are you terminating the 1PPS output with 50 Ohms? They expect 1M Ohms..
Bye,
Said
Sent from my iPad
On Nov 24, 2012, at 2:42 PM, Mark Spencer mspencer12...@yahoo.ca wrote:
Greetings. I recently acquired two Z3805A gpsdo's from the usual auction
site. (These units look like a
and, yes, if your 'scope has the 50ohm/1Mohm input capability, use the 1M
one.
On Sun, Nov 25, 2012 at 12:03 AM, Azelio Boriani
azelio.bori...@screen.itwrote:
Usually the PPS output from the Z-series GPSDO is a 26uS wide (from the
HP58503A datasheet) TTL pulse. To measure it you must use a
I had a similar requirement a couple of years back. I ended up using a $10
VCXO, and a $20 Jupiter GPS. The circuit used was the one on page 12 of
http://g4jnt.com/DDSVHFBeaconDriver.pdf by G4JNT. It just scraped in under
$50
Dave
Ww2r
Message: 4
Date: Sat, 24 Nov 2012 09:01:25 -0700
From:
Usually the PPS output from the Z-series GPSDO is a 26uS wide (from the
HP58503A datasheet) TTL pulse. To measure it you must use a fast
oscilloscope (because of the fast pulse rise time) and an analog or digital
memory (because of the very low repetition rate). The best is to use a
digital
mspencer12...@yahoo.ca said:
Does any one know the specified output level for the 1pps signals or have a
high confidence measurement of the output voltage that they could share with
me ? (Measuring fast rise time signals is not really my forte and I don't
trust my measurements of an apparent
TTL transition times are not all that fast, about 6ns for LS TTL, and
with a 26uS pulse width, you would only need a fast oscilloscope to
characterize the pulse edges. Delay, phase, and pulse height
measurements in this case could be made even with a 20 MHz,
0.35/20Mhz=17.5ns rise and fall time,
What is the MS type for the power plug for a 5061A ?
I could not find it in the PDF I have.
-pete
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Thanks all for the responses.
I am routing the signal via 50 ohm coax to the 1Meg ohm input of a 100 Mhz
analog scope using dc coupling. After some fiddling with the trigger settings
I am able to observe a brief pulse every second that appears to be .15 volts
above ground. I'm not
I can think of some possibilities with the caveat that I am not
familiar with the Z3805A units:
1. The PPS output could be damaged.
2. The PPS output could be an open collector/drain output which
requires a pull-up resistor since it can only sink current.
3. The PPS output might have trouble
Pete,
In the US, Galco sells a DDK product that works well. The connector and
shell are a DMS3106A18-22S.
http://www.galco.com/buy/DDK/DMS3106A18-22S
You will also need a clamp and strain relief. I use a DMS3057-10A.
http://www.galco.com/buy/DDK/DMS3057-10A
It is the same connector as a
I hoped it helped also. I know it did for me. Will order 2 sets so I can
finally have real connectors on the 5061 and 5065. I wonder if its the same
for the standby power supply may need to order 3.
Regards
Paul
WB8TSL
On Sat, Nov 24, 2012 at 9:35 PM, J. L. Trantham jlt...@att.net wrote:
Pete,
http://www.leapsecond.com/museum/hp5065a/conn.htm
/tvb (iPhone4)
On Nov 24, 2012, at 4:50 PM, Pete Lancashire p...@petelancashire.com wrote:
What is the MS type for the power plug for a 5061A ?
I could not find it in the PDF I have.
-pete
Paul,
According to the 5089 manual, the power connector is the same. Both the
5085 and 5089 call for the same HP part number for the AC power cord.
Therefore, I suspect they are the same.
I have a 5085 hooked up and I can make sure tomorrow if you need it.
Joe
-Original Message-
From:
18-22S is what I needed, now to go into the depths of the garaged and
find the box of MS connectors.
-pete
On Sat, Nov 24, 2012 at 6:35 PM, J. L. Trantham jlt...@att.net wrote:
Pete,
In the US, Galco sells a DDK product that works well. The connector and
shell are a DMS3106A18-22S.
I've had a few emails on what I meant by just needing the 18-22S. The
series of connectors
this on is from came out in WW2 to attempt to standardize on
connectors. One feature is the
outer shell and the inner insulated center are interchangeable.
This glossy gives a pretty good overview and how
Forgot to mention, when you get the DMS3106A18-22S, you'll have to unscrew
the back, remove the connector insert, file out a small 'key' in the
material, and rotate the insert to achieve the desired alignment to mate
with the connector on the 5061A or the 5065A. The alignment is the same on
both
Unfortunately, my junk box is not so well stocked with MS connectors. The
DDK units are much cheaper than the Cannon connectors.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Pete Lancashire
Sent: Saturday, November 24, 2012
On Sat, Nov 24, 2012 at 08:35:44PM -0600, J. L. Trantham wrote:
Pete,
In the US, Galco sells a DDK product that works well. The connector and
shell are a DMS3106A18-22S.
http://www.galco.com/buy/DDK/DMS3106A18-22S
You will also need a clamp and strain relief. I use a DMS3057-10A.
If you are going to be filing them, then you should wear a face mask - the
base plating on those things (even now) is normally Cadmium. What you
actually want is a MS3106A18-22SW, but it looks like that vendor only
supplies connectors with the default polarization.
On Sun, Nov 25, 2012 at
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