I did quite a bit of testing of the Tbolt response to ambient temperature. The
way I wound up isolating mine from the 1 degree C ambient temperature swings
due to air conditioning was to find a corrugated cardboard box a couple of
inches bigger than the Tbolt on each side. I placed the Tbolt
I don't know if my Thunderbolt installation is
good, but here is my experiment.
The Tbolt is bolted to a 6 mm thick copper plate
10 cm wide and 56 cm long, weighing 3 kg. It's
a piece of buss-bar that I bought from the local
scrap metal dealer. Silver-plated too.
The equipment is in my baseme
11 bucks, a couple of weeks, and Ebay item 390046919575 should make you
happy...
RF pigtail BNC female bulkhad to SMA female nut cable
_
Windows Live™ SkyDrive™: Store, access, and share your photos. See how.
http://windowslive.co
I received the LPRO-101 today, looks OK, but I'll get to really test it
tomorrow.
In thinking of how to package it I require an SMA-Female to BNC-Female Cable.
The BNC end needs to be a Panel Mount. It need only be a few inches long.
Does anyone have such a critter laying about ? I have created s
Hi Nigel,
>May be, but does not sound to be very logic to select OCXOs for low noise
>and then stick the 'low noise' label to the bad parts...
>
>Hi Arnold
>
>Many thanks for the photos, which confirmed what I understood from your
>previous comments, that the label doesn't say "
In a message dated 23/07/2009 20:36:04 GMT Daylight Time,
arnold.ti...@gmx.de writes:
May be, but does not sound to be very logic to select OCXOs for low noise
and then stick the 'low noise' label to the bad parts...
Hi Arnold
Many thanks for the photos, which confirmed wh
>That's what I've been assuming all along, but the idea that some of them
>were hand-selected for PN is new to me.
>
>
>I suppose the potentially worrying thing about a cryptic label that just
>says "phase noise" is that it could be as appropriate to indicate the
>presence
Hi,
I'm putting mine in a 3U eurocard rack module. Then I can put it in a 19" rack
in the workshop or a portable half rack. I've already got an Oncore rx and TVB
divider in modules. I pick up surplus kit and re-cycle the hardware. In the
past I've built many items into old HP cases. Odd items l
Mine lives in an old external SCSI box (from an HP DAT24 drive).
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Pete Lancashire
Sent: 23 July 2009 18:10
To: time-nuts@febo.com
Subject: [time-nuts] Tbolt packaging - suggestions ?
I've ordered a Tbolt and for now will use the PS
that comes with it. In the future I will upgrade
to a DC supply backed by a battery.
What have u' other Tbolt owners done for packaging
specially with all the discussion about maintaining
a constant temp ?
For now, I'm eying my pile of junk/spare p
In a message dated 23/07/2009 17:30:40 GMT Daylight Time, jmi...@pop.net
writes:
That's what I've been assuming all along, but the idea that some of them
were hand-selected for PN is new to me.
I suppose the potentially worrying thing about a cryptic label that just
s
I happened to notice that the 5 volt supply was set at around 4.9 volts, not
usually a problem. I upped it to 5.1 and started getting receive data
packets. As usual, an operator headspace problem. Thanks for all the help.
___
time-nuts mailing list -- tim
> Didn't that older unit use a different oscillator anyway?
Yes. Its broadband PN wasn't that bad, but it wasn't very clean/stable at
short timescales.
Further complicating matters is that my old Thunderbolt probably had 10,000
or more hours on it before I ever even gained the ability to measur
In a message dated 23/07/2009 16:40:44 GMT Daylight Time, jmi...@pop.net
writes:
Now that's interesting. Maybe that's why these units are so much cleaner
than the old one I had. Has anyone else removed the OCXO from a
TAPR-purchased unit and noticed one of those labels?
--
>
> >I opened the mute Tbolt up to check the solder connections on
> the DB9 and I
> >see it has version 2.2 firmware. How big a deal is it that it
> doesn't have
> >3.0? Also, it has the Trimble 37265 OCXO. I understand that
> there were good
> >and not so good OCXOs used in these. Is this one of
>I opened the mute Tbolt up to check the solder connections on the DB9 and I
>see it has version 2.2 firmware. How big a deal is it that it doesn't have
>3.0? Also, it has the Trimble 37265 OCXO. I understand that there were good
>and not so good OCXOs used in these. Is this one of the good ones?
I opened the mute Tbolt up to check the solder connections on the DB9 and I
see it has version 2.2 firmware. How big a deal is it that it doesn't have
3.0? Also, it has the Trimble 37265 OCXO. I understand that there were good
and not so good OCXOs used in these. Is this one of the good ones?
_
Just to let you know I ordered from Bob (the well-known fluke.l on eBay)
what seems to be a small distribution amplifier. The PCB features 6 outputs
(2-sine, 4-square) with an external input (5-20 MHz), an integrated OCXO and
powered with +12V. Priced 68 USD or @ 50 USD without the OCXO. Don't know
Demain,
Apparently, in my rush I misread that data sheet. If it can't be easily
modified, some of the guys were offering a decent distribution board at a
reasonable price. I too need a sine wave rather than square. It still makes
one heck of a nice housing so nothing is lost.
Phil
- Orig
Demain,
I too bought a couple of that same model but it will be about a week before
I have receive them.
Did you see that data sheet that Bruce linked to?
http://www.freewebs.com/beststuff2u/MFS-207.pdf
From what I understood of the distribution modules (MBF), each module had 4
different out
Ulrich,
That program I linked to earlier, microsofts ComDisable, will stop that com
port from detecting attached devices on boot for selected ports.
Once the system boots there is no issue using the com ports. We used to have
that problem with weather equipment attached to com ports. Windows wou
I received the unit. The shipping and packing was very good- no peanuts!
The one I got was different from what I expected. It's a 5 MHz unit with 20
outputs. More than I could conceivably need. I looked inside. The supply is
actually 25V. The input module has an FPGA for some reason, probably to
c
Another clue is to switch to an OS that does not have this problem :-)
2009/7/23 Ulrich Bangert :
> Since this problem arises at Windows BOOT time (long before any application
> software possibly not directly written into XP environments can get active),
> this is clearly NOT an application prog
> I've gotten in the habit of marking the connectors on my serial cables
> with a big X if it's a crossover and a || if it isn't.
Male to female cables should be non-crossover, others should be crossover
___
time-nuts mailing list -- time-nuts@febo.com
24 matches
Mail list logo
