China Oscillator Alternative
List,
After all the problems that Bob Camp has noted with surplus OCXO's from China, perhaps buying the new Lucent units on Ebay may save bad words and/or unhappy actions.
LUCENT/SYMMETRICOMKS-24361 L101, Z3812A, RFTG-U REF-0 UNIT -CASE OF 2 EACH
$80 So for about $50 each delivered one has two brand new units that are already in a chassis so with just a simple lap top computer PS one is on the air.
Regards,
Perrier
On Thu, 10 Nov 2016 00:18:31 +0000 (UTC)
Perry Sandeen via time-nuts time-nuts@febo.com wrote:
After all the problems that Bob Camp has noted with surplus OCXO's from China, perhaps buying the new Lucent units on Ebay may save bad words and/or unhappy actions.
Depends on what you are after. IMHO, unless there is a really rare and
possibly quite good OCXO on ebay (like well aged 10811) or very cheap
DOCXOs (like the Oscilloquartz 8663), then it does not necessairly make
sense to buy them used. For a lot of applications, a 35€[1] to 60€[2]
OCXO is enough. For 110€[3] you already get quite low noise, high stability
ones. If you need better, you go into the 150-200€[4] realm....
Beyond 200€ you are in a region where ebay does not have any offers.
But then you are also in an region where you want to know exactly
what you are buying.
I used the Abracon OCXOs here, because they are readily available
from Mouser and Digikey (which also includes prices). You can also
go to Vectron, Wenzel and Axtal and depending on your requirments
you should be at similar prices.
Of course you can also go for the DIY oscillator, but then you need
to get your hands on SC cut crystals (not that many companies sell them)
and design and build your own circuit and oven. You might get better
results than the run of the mill designs, but I doubt you'll get below
200€ with something like that.
Please be aware that just because something is sold on ebay does not
mean it's cheap. Actually a lot of the special stuff is sold for almost
or sometimes even over the new price, because it's "rare".
Attila Kinali
[1] Abracon AOCJYR
[2] Abracon AOCJY1
[3] Abracon AOCJY3
[4] Abracon AOCJY4
Malek's Law:
Any simple idea will be worded in the most complicated way.
These have 10Mhz & 15Mhz out, which frequency is the OCXO?
Ed
On 11/9/2016 7:18 PM, Perry Sandeen via time-nuts wrote:
List,
After all the problems that Bob Camp has noted with surplus OCXO's from China, perhaps buying the new Lucent units on Ebay may save bad words and/or unhappy actions.
LUCENT/SYMMETRICOMKS-24361 L101, Z3812A, RFTG-U REF-0 UNIT -CASE OF 2 EACH
$80 So for about $50 each delivered one has two brand new units that are already in a chassis so with just a simple lap top computer PS one is on the air.
Regards,
Perrier
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Am 10.11.2016 um 07:02 schrieb Ed Armstrong:
These have 10Mhz & 15Mhz out, which frequency is the OCXO?
A 5 MHz MTI-260
See the text I linked to a few days ago.
On 11/9/2016 7:18 PM, Perry Sandeen via time-nuts wrote:
List,
After all the problems that Bob Camp has noted with surplus OCXO's
from China, perhaps buying the new Lucent units on Ebay may save bad
words and/or unhappy actions.
LUCENT/SYMMETRICOMKS-24361 L101, Z3812A, RFTG-U REF-0 UNIT -CASE OF 2
EACH
$80 So for about $50 each delivered one has two brand new units that
are already in a chassis so with just a simple lap top computer PS
one is on the air.
Someone here gave a hack to use the negative output of the RS422.
That works nicely with a HAMA USB to RS232 cable. For the pinout
converter I simply cut off the cable from an old Logitech mouse.
Then half of the work is already done. Just solder the plug to
the Lucent.
Does that mean there is new supply? I did my best to dry up
the last wave of non GPS units :-)
regards, Gerhard
Hi
Unless we are talking about something completely different ….
The Z3812’s have a lot of information back in the archives. Just about
anything you would want to know is buried in there. Just like “back then”
they still are new in the box / old stock. You aren’t buying something that
has sat out who knows where for who knows how long ….
Bob
On Nov 10, 2016, at 4:04 AM, Gerhard Hoffmann dk4xp@arcor.de wrote:
Am 10.11.2016 um 07:02 schrieb Ed Armstrong:
These have 10Mhz & 15Mhz out, which frequency is the OCXO?
A 5 MHz MTI-260
See the text I linked to a few days ago.
On 11/9/2016 7:18 PM, Perry Sandeen via time-nuts wrote:
List,
After all the problems that Bob Camp has noted with surplus OCXO's from China, perhaps buying the new Lucent units on Ebay may save bad words and/or unhappy actions.
LUCENT/SYMMETRICOMKS-24361 L101, Z3812A, RFTG-U REF-0 UNIT -CASE OF 2 EACH
$80 So for about $50 each delivered one has two brand new units that are already in a chassis so with just a simple lap top computer PS one is on the air.
Someone here gave a hack to use the negative output of the RS422.
That works nicely with a HAMA USB to RS232 cable. For the pinout
converter I simply cut off the cable from an old Logitech mouse.
Then half of the work is already done. Just solder the plug to
the Lucent.
Does that mean there is new supply? I did my best to dry up
the last wave of non GPS units :-)
regards, Gerhard
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.