Re: [time-nuts] eBay Giveaway Vectron OCXOs
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's a
12V part?
If nothing else this could be a very stable, ovenized 4.8V lab reference
source..
Is anyone planning to monitor the aging/stability/noise of this reference?
bye,
Said
In a message dated 12/23/2011 07:28:34 Pacific Standard Time,
danrae@verizon.net writes:
Thanks for all the responses. A quick check before breakfast shows that
mine would seem to be for 5 Volts since the power consumption at that
input agrees with the data sheet referenced; the current peaks at 0.95 A
warming up and 0.13 A warm. Reference V out is 4.8 V.
Dan
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's a
12V part?
Has anybody traced out the board? Is the power to the OCXO connected to one
of the power rails feeding the Rb?
--
These are my opinions, not necessarily my employer's. I hate spam.
On 12/23/2011 08:26 PM, SAIDJACK@aol.com wrote:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's a
12V part?
If nothing else this could be a very stable, ovenized 4.8V lab reference
source..
Is anyone planning to monitor the aging/stability/noise of this reference?
My guess would be for 12 V, but 5V would be one to try.
Measuring the frequency stability on 5V would be one thing to try.
Cheers,
Magnus
bye,
Said
In a message dated 12/23/2011 07:28:34 Pacific Standard Time,
danrae@verizon.net writes:
Thanks for all the responses. A quick check before breakfast shows that
mine would seem to be for 5 Volts since the power consumption at that
input agrees with the data sheet referenced; the current peaks at 0.95 A
warming up and 0.13 A warm. Reference V out is 4.8 V.
Dan
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and follow the instructions there.
A search of the Vectron site for OCO500 (which is on my unit) brings up
a datasheet which references that as a "replaced" unit.
http://www.vectron.com/products/ocxo/c4550.pdf
Shows there are 5, 12 and 3.3 volt options. I don't see where 4.8 volts
is a reference output voltage, the closest is 5 volts with the 12 volt
unit. I would put the unit on a variable bench supply and slowly raise
the input voltage to see where the reference stops increasing but I
would hazard a guess that it is a 12 volt unit. If you increase the
supply to 5.5 etc then in that case you would see the reference stop
increasing at 5.0.
Peter
On 12/23/2011 2:42 PM, Magnus Danielson wrote:
On 12/23/2011 08:26 PM, SAIDJACK@aol.com wrote:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe
it's a
12V part?
If nothing else this could be a very stable, ovenized 4.8V lab
reference
source..
Is anyone planning to monitor the aging/stability/noise of this
reference?
My guess would be for 12 V, but 5V would be one to try.
Measuring the frequency stability on 5V would be one thing to try.
Cheers,
Magnus
bye,
Said
In a message dated 12/23/2011 07:28:34 Pacific Standard Time,
danrae@verizon.net writes:
Thanks for all the responses. A quick check before breakfast shows
that
mine would seem to be for 5 Volts since the power consumption at that
input agrees with the data sheet referenced; the current peaks at 0.95 A
warming up and 0.13 A warm. Reference V out is 4.8 V.
Dan
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To unsubscribe, go to
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On 12/23/2011 11:26 AM, SAIDJACK@aol.com wrote:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's a
12V part?
I'm pretty sure it is a 5 Volt part Said, the power drawn in both states
matches the data sheet well. Warm up is quick and correct for the size
etc., at 5 V so I'm not going to put 12 Volts into it :^) I haven't
checked how stable the Vref is but it gives the nominal frequency output
at 1.55 V on the EFC pin. Total EFC range is 800 Hz odd. Output would
appear to be at HCMOS level not 50 Ohm sine. It is always possible to
use an external reference source anyway.
As a DDS clock it is immaterial to me what the frequency is, so long as
it is stable, which this one is. If the data sheet for the replacement
part is to be believed the phase noise will be good. I could do phase
noise measurements but that takes a lot of time and effort so I am happy
to trust their data for my own purposes :^)
Again, thanks to all for the input.
Dan
p.s. and the Rb that came with it is 3 mHz high out of the box.
El 23/12/2011 20:38, Hal Murray escribió:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's a
12V part?
Has anybody traced out the board? Is the power to the OCXO connected to one
of the power rails feeding the Rb?
The OCXO is supplied separately and does not seem to be part of the board :)
Regards,
Javier
Depending on how old these OCXOs are, I may have an original datasheet for them. Most of my collection is early to mid 90's.
-Dave
----- Original Message -----
From: "Javier Herrero" jherrero@hvsistemas.es
To: time-nuts@febo.com
Sent: Friday, December 23, 2011 12:37:10 PM
Subject: Re: [time-nuts] eBay Giveaway Vectron OCXOs
El 23/12/2011 20:38, Hal Murray escribió:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's a
12V part?
Has anybody traced out the board? Is the power to the OCXO connected to one
of the power rails feeding the Rb?
The OCXO is supplied separately and does not seem to be part of the board :)
Regards,
Javier
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On 12/23/2011 12:42 PM, d.seiter@comcast.net wrote:
Depending on how old these OCXOs are, I may have an original datasheet for them. Most of my collection is early to mid 90's.
Dave, obviously it would be great if you did have one, but from the data
sheets, Vectron assigned an arbitrary part number suffix to the generic
number once you ordered the options you want, in this case the -18
suffix, and it can't easily be translated back...
Dan
Figures...
-Dave
----- Original Message -----
From: "Dan Rae" danrae@verizon.net
To: "Discussion of precise time and frequency measurement" time-nuts@febo.com
Sent: Friday, December 23, 2011 12:59:11 PM
Subject: Re: [time-nuts] eBay Giveaway Vectron OCXOs
On 12/23/2011 12:42 PM, d.seiter@comcast.net wrote:
Depending on how old these OCXOs are, I may have an original datasheet for them. Most of my collection is early to mid 90's.
Dave, obviously it would be great if you did have one, but from the data
sheets, Vectron assigned an arbitrary part number suffix to the generic
number once you ordered the options you want, in this case the -18
suffix, and it can't easily be translated back...
Dan
time-nuts mailing list -- time-nuts@febo.com
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and follow the instructions there.
On 12/23/2011 09:59 PM, Dan Rae wrote:
On 12/23/2011 12:42 PM, d.seiter@comcast.net wrote:
Depending on how old these OCXOs are, I may have an original datasheet
for them. Most of my collection is early to mid 90's.
Dave, obviously it would be great if you did have one, but from the data
sheets, Vectron assigned an arbitrary part number suffix to the generic
number once you ordered the options you want, in this case the -18
suffix, and it can't easily be translated back...
You would have to look up their database to find the formula.
Would be nice if they would publish that list for acient devices with
datasheets, as service to time-nuts, but it's dreams. But what else can
a time-nut ask for after the H-maser and more measurement toys for
Christmas?
PS. Santa, you can fit the H-maser under the Christmas tree next to my car.
Cheers,
Magnus
On 12/23/11 1:16 PM, Magnus Danielson wrote:
On 12/23/2011 09:59 PM, Dan Rae wrote:
On 12/23/2011 12:42 PM, d.seiter@comcast.net wrote:
Depending on how old these OCXOs are, I may have an original datasheet
for them. Most of my collection is early to mid 90's.
Dave, obviously it would be great if you did have one, but from the data
sheets, Vectron assigned an arbitrary part number suffix to the generic
number once you ordered the options you want, in this case the -18
suffix, and it can't easily be translated back...
Usually, it's just a sequential number. -18 would be the eighteenth
custom model they did.
You would have to look up their database to find the formula.
That would be nice (and not just for Vectron)
The challenge is that sometimes the combination of specs/options is
something that reveals information that's a competitive advantage.
There's a limited number of buyers and sellers of these kind of things,
particularly for more specialized applications. For instance, if there
were two companies in a particular niche market, say that used something
like 31.415926535 MHz, and you saw that Vectron was making that
oscillator with a particular combination of temperature range and
stability requirements.. and you were bidding on an RFP which oddly
enough had exactly the same requirements.
Would be nice if they would publish that list for acient devices with
datasheets, as service to time-nuts, but it's dreams. But what else can
a time-nut ask for after the H-maser and more measurement toys for
Christmas?
PS. Santa, you can fit the H-maser under the Christmas tree next to my car.
I just ask for gold bars. I figure I can turn those nice compact bars
into whatever I need, and that leaves room for other stuff, and makes it
easier to water the tree.
El 23/12/2011 22:16, Magnus Danielson escribió:
PS. Santa, you can fit the H-maser under the Christmas tree next to my
car.
And if possible, not over your car? ;)
Regards,
Javier
On 12/23/2011 10:31 PM, Jim Lux wrote:
On 12/23/11 1:16 PM, Magnus Danielson wrote:
On 12/23/2011 09:59 PM, Dan Rae wrote:
On 12/23/2011 12:42 PM, d.seiter@comcast.net wrote:
Depending on how old these OCXOs are, I may have an original datasheet
for them. Most of my collection is early to mid 90's.
Dave, obviously it would be great if you did have one, but from the data
sheets, Vectron assigned an arbitrary part number suffix to the generic
number once you ordered the options you want, in this case the -18
suffix, and it can't easily be translated back...
Usually, it's just a sequential number. -18 would be the eighteenth
custom model they did.
You would have to look up their database to find the formula.
That would be nice (and not just for Vectron)
Indeed.
The challenge is that sometimes the combination of specs/options is
something that reveals information that's a competitive advantage.
There's a limited number of buyers and sellers of these kind of things,
particularly for more specialized applications. For instance, if there
were two companies in a particular niche market, say that used something
like 31.415926535 MHz, and you saw that Vectron was making that
oscillator with a particular combination of temperature range and
stability requirements.. and you were bidding on an RFP which oddly
enough had exactly the same requirements.
I was talking about ancient devices, for which most of those issues
would be fairly historic.
Would be nice if they would publish that list for acient devices with
datasheets, as service to time-nuts, but it's dreams. But what else can
a time-nut ask for after the H-maser and more measurement toys for
Christmas?
PS. Santa, you can fit the H-maser under the Christmas tree next to my
car.
I just ask for gold bars. I figure I can turn those nice compact bars
into whatever I need, and that leaves room for other stuff, and makes it
easier to water the tree.
Booring, there needs to be some challenges in there.
Cheers,
Magnus
On 12/23/2011 10:32 PM, Javier Herrero wrote:
El 23/12/2011 22:16, Magnus Danielson escribió:
PS. Santa, you can fit the H-maser under the Christmas tree next to my
car.
And if possible, not over your car? ;)
Indeed. He knows it well from my many visits, so I'm not all that worried.
Hohoho...
Cheers,
Magnus
I tested a couple of the oscillators. The Reference Output Voltage does not
plateau as the input voltage is increased. It does hit 3.00V for an input of
3.3V. It is at 4.5V when the input is 5v and keeps climbing well past 5V as
the input voltage is raised. So, it appears to be a simple 0.9 times the
input voltage. One unit failed at 12V. At 3.3V, the initial current drain is
0.45A for a net power of 1.48W and after a short time the current drops to
0.16A for a net power of 0.53W. Both numbers are well below the maximum
ratings, but typical ratings are not given and the rapid drop between the
two plateaus indicates the oven controller is working fine.
So, my bet is placed on the devices being 3.3V.
John WA4WDL
From: "Peter Gottlieb" nerd@verizon.net
Sent: Friday, December 23, 2011 2:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] eBay Giveaway Vectron OCXOs
A search of the Vectron site for OCO500 (which is on my unit) brings up a
datasheet which references that as a "replaced" unit.
http://www.vectron.com/products/ocxo/c4550.pdf
Shows there are 5, 12 and 3.3 volt options. I don't see where 4.8 volts
is a reference output voltage, the closest is 5 volts with the 12 volt
unit. I would put the unit on a variable bench supply and slowly raise
the input voltage to see where the reference stops increasing but I would
hazard a guess that it is a 12 volt unit. If you increase the supply to
5.5 etc then in that case you would see the reference stop increasing at
5.0.
Peter
On 12/23/2011 2:42 PM, Magnus Danielson wrote:
On 12/23/2011 08:26 PM, SAIDJACK@aol.com wrote:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's
a
12V part?
If nothing else this could be a very stable, ovenized 4.8V lab
reference
source..
Is anyone planning to monitor the aging/stability/noise of this
reference?
My guess would be for 12 V, but 5V would be one to try.
Measuring the frequency stability on 5V would be one thing to try.
Cheers,
Magnus
bye,
Said
In a message dated 12/23/2011 07:28:34 Pacific Standard Time,
danrae@verizon.net writes:
Thanks for all the responses. A quick check before breakfast shows
that
mine would seem to be for 5 Volts since the power consumption at that
input agrees with the data sheet referenced; the current peaks at 0.95 A
warming up and 0.13 A warm. Reference V out is 4.8 V.
Dan
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
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and follow the instructions there.
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To unsubscribe, go to
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John,
If the one that failed is now dead, they are not all that hard to open
up. Component
failure analysis once was a job for me. I've not looked at my two
closely and they
are not in front of me, but I use to grind off the seam two ways, have
a can opener,
they actually make them for this purpose. If not and you have a model shop
start by using a belt sander to 'grind' down the lip, then I'd take
over with a die grinder
and a set of very fine files.
If you really want to gamble, and have a cheap pair of cutters you
dont mind abusing,
and if the can is not steel you can cut the lip off.
Either way, the edges will be VERY sharp, ...
-pete
On Fri, Dec 23, 2011 at 1:49 PM, jmfranke jmfranke@cox.net wrote:
I tested a couple of the oscillators. The Reference Output Voltage does not
plateau as the input voltage is increased. It does hit 3.00V for an input of
3.3V. It is at 4.5V when the input is 5v and keeps climbing well past 5V as
the input voltage is raised. So, it appears to be a simple 0.9 times the
input voltage. One unit failed at 12V. At 3.3V, the initial current drain is
0.45A for a net power of 1.48W and after a short time the current drops to
0.16A for a net power of 0.53W. Both numbers are well below the maximum
ratings, but typical ratings are not given and the rapid drop between the
two plateaus indicates the oven controller is working fine.
So, my bet is placed on the devices being 3.3V.
John WA4WDL
From: "Peter Gottlieb" nerd@verizon.net
Sent: Friday, December 23, 2011 2:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] eBay Giveaway Vectron OCXOs
A search of the Vectron site for OCO500 (which is on my unit) brings up a
datasheet which references that as a "replaced" unit.
http://www.vectron.com/products/ocxo/c4550.pdf
Shows there are 5, 12 and 3.3 volt options. I don't see where 4.8 volts
is a reference output voltage, the closest is 5 volts with the 12 volt unit.
I would put the unit on a variable bench supply and slowly raise the input
voltage to see where the reference stops increasing but I would hazard a
guess that it is a 12 volt unit. If you increase the supply to 5.5 etc then
in that case you would see the reference stop increasing at 5.0.
Peter
On 12/23/2011 2:42 PM, Magnus Danielson wrote:
On 12/23/2011 08:26 PM, SAIDJACK@aol.com wrote:
Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's
a
12V part?
If nothing else this could be a very stable, ovenized 4.8V lab reference
source..
Is anyone planning to monitor the aging/stability/noise of this
reference?
My guess would be for 12 V, but 5V would be one to try.
Measuring the frequency stability on 5V would be one thing to try.
Cheers,
Magnus
bye,
Said
In a message dated 12/23/2011 07:28:34 Pacific Standard Time,
danrae@verizon.net writes:
Thanks for all the responses. A quick check before breakfast shows
that
mine would seem to be for 5 Volts since the power consumption at that
input agrees with the data sheet referenced; the current peaks at 0.95 A
warming up and 0.13 A warm. Reference V out is 4.8 V.
Dan
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and follow the instructions there.
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To unsubscribe, go to
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To unsubscribe, go to
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