Hi,
About five years ago I purchased a rubidium standard on eBay. It was an
Efratom. Sadly although The oscillator was working but it wouldn't
lock. I was comparing it to a HP Z38001A which I use as the frequency
standard in my lab.
I tried to fix it, but I couldn't find the correct
Taka,
I'm assuming you meant an HP 53132A?
Anyway to make meaningful measurements you need a DMTD setup or some
other resolution expanding scheme.
An HP 5065A would be your best bet to add to your stable!
Between a good cherry picked Quartz and the 5065A you could cover most
bases easily!
In my personal lab, I have many oscillators that I consider "standards". They
have varying long term and short term stability. I have:
1: HP11811-6011 double oven
2: Nortel GPSTM GPSDO (I have two)
3: Efratom PRFS1024: Efratom PRFS2025: PRS-10 disciplined by Trimble
Resolution-T GPS
5:
Well Ian there are lots of guys on nets using archaic equipment. I go to some
of their swap meets. I have repaired, built, and salvaged many of those old
items. Of course back then the 1 kHz resolution of Collins gear was amazing.
I built a frequency meter a while back. An interesting
Hi
So what’s the downside to all this:
Keeping an OCXO (and counter) turned on 24 hours a day, 365 days a year burns
power. If you
also live in air conditioning land, you pay even more to get rid of the heat
from the power.
Sit down and do the math. You likely will find this is not as cheap
Most of the UCCM devices don't store the position. They do a survey every time
they power on. The Samsung devices also seem to do a survey after extended
periods of holdover. Some of the Trimble (or is it Symmetricom) units will
save the survey position in EEPROM.
I recently did a
On 1/26/19 2:41 PM, Hal Murray wrote:
jimlux said:
( a very narrow spectrum analysis from a whip antenna is fascinating..)
If/when you get a chance, please post a picture.
next time I hook it up, I will.
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time-nuts mailing list --
On 1/26/19 4:31 PM, Bob Albert via time-nuts wrote:
Well you are right that I am bit far from JPL. I used to work there. But I am impressed with the number of replies and the number of suggestions. I am still mulling over what will work for me.
Bob,
Frequency counters are practically
On 1/26/2019 10:43 AM, Bob Albert via time-nuts wrote:
My counter is an HP 5328A I belive. Not the top of the line but with care it can do a decent job. It's oscillator is the standard oven job. When I got it, it was almost spot on but it's been
There is no standard oven oscillator.
On 1/26/2019 1:31 PM, Bob Albert via time-nuts wrote:
I am, as I have said, money limited to the point where most solutions won't
work for me.
My counter is an HP 5328A I belive. Not the top of the line but with care it
can do a decent job. It's oscillator is the standard oven job. When
On 1/26/19 1:31 PM, Bob Albert via time-nuts wrote:
Well you are right that I am bit far from JPL. I used to work there. But I
am impressed with the number of replies and the number of suggestions. I am
still mulling over what will work for me. Apparently this group is made up of
jimlux said:
> ( a very narrow spectrum analysis from a whip antenna is fascinating..)
If/when you get a chance, please post a picture.
--
These are my opinions. I hate spam.
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To unsubscribe,
Well you are right that I am bit far from JPL. I used to work there. But I
am impressed with the number of replies and the number of suggestions. I am
still mulling over what will work for me. Apparently this group is made up of
helpful and knowledgable guys who aren't afraid to share
On 1/26/19 10:43 AM, Bob Albert via time-nuts wrote:
Dave, thanks for the info. I am, as I have said, money limited to the point
where most solutions won't work for me.
My counter is an HP 5328A I belive. Not the top of the line but with care it
can do a decent job. It's oscillator is the
cks away who has all you
need.
Cheers,
Dave M
- Original Message -
From: "Bob Albert via time-nuts"
To: "Discussion of precise time and frequency measurement"
Cc: "Bob Albert"
Sent: Saturday, January 26, 2019 12:06:43 AM
Subject: Re: [time-n
has all you need.
>
>
> Cheers,
> Dave M
>
> - Original Message -
>
> From: "Bob Albert via time-nuts"
> To: "Discussion of precise time and frequency measurement" <
> time-nuts@lists.febo.com>
> Cc: "Bob Albert"
> Sent:
someone just a couple of blocks away who has all you
need.
Cheers,
Dave M
- Original Message -
From: "Bob Albert via time-nuts"
To: "Discussion of precise time and frequency measurement"
Cc: "Bob Albert"
Sent: Saturday, January 26, 2019 12:06:43
Hi
What are the alternatives:
1) If you are doing it by ear and listening to WWVB beats and fading, something
around 0.1 ppm (one hertz at 10 MHz) is doing pretty well.
I suppose if you lived in Ft. Colins you could do better.
2) A typical OCXO in a counter will drift and age. Depending a
On 1/26/19 5:00 AM, John Ackermann. N8UR wrote:
Hi Bob --
A GPSDO can replace the OCXO in your counter, and that's now most folks would
use it.
If you just want to calibrate the OCXO, you don't need a GPSDO -- you can do
that with just a GPS that has a pulse-per-second output, and a scope.
Hi Bob --
A GPSDO can replace the OCXO in your counter, and that's now most folks would
use it.
If you just want to calibrate the OCXO, you don't need a GPSDO -- you can do
that with just a GPS that has a pulse-per-second output, and a scope.
Use the GPS PPS to trigger the scope and adjust
On 1/25/2019 10:06 PM, Bob Albert via time-nuts wrote:
accuracy of only about 1 part in 20 million. I want it somewhat better,
but no way do I need it 100 times better. If I could set it within 0.1
Hz that would be fine - it would enable frequency
You're kidding yourself on the 1 part in
Paul, thanks for your reply.
You ask what I want to accomplish. Basically I just want to be able to
calibrate the OCXO in my counter. I don't get a good enough signal from WWV
and don't really have a proper method for adjustment.
I listen to the highest froquency WWV I can hear, and these
Bob
The gpsdos will be far superior to the method you are currently using. I
will guess 100-1000 times better and higher. I took a quick look at EBAY
boy there are lot of them these days. We all have our favorites. Trimbles,
HPs... But what would help is understanding your need. What do you want
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