There was also the short lived XPLA2 PZ/XCR3320,3960 (Ph/X) SRAM CPLD
family, which had to be configured from an external memory... just
another exception which confirms the rule.
ftp://ftp.xilinx.com/pub/coolpld/isp/960_conf.pdf
The even older intel FLEXlogic, bought by Altera, and rebranded
The essentials of a Wikinson TDC can be simplified to the attached
circuit which only requires the addition of a zero crossing comparator
to monitor the voltage across the capacitor C1.
A few refinements to improve the capacitor charging current switching
transitions and the addition of an
Do you have an actual circuit?
It looks a lot like the old hp5360 counter interpolator.
Regards
Paul
On Sun, Apr 29, 2012 at 3:51 AM, Bruce Griffiths bruce.griffi...@xtra.co.nz
wrote:
The essentials of a Wikinson TDC can be simplified to the attached circuit
which only requires the addition
Hi Magnus,
On 4/28/2012 5:37 PM, Magnus Danielson wrote:
Hi Ed,
On 04/28/2012 08:43 PM, Ed Palmer wrote:
First, I'd like to thank Magnus, Joe, Paul, and Ed for taking the time
to provide answers, ideas, and challenges to my assumptions. It has all
been very helpful. I'm still working on it so
Hi Gordon,
I checked the link. The contacts are the same family, but they're a
smaller version for use in connectors rather than soldered into a board.
Thanks,
Ed
On 4/28/2012 6:05 PM, Gordon Batey wrote:
Greetings to the time keepers,
We used to use those connectors way
back in the
Hi, Time-Nuts guys I just baught a Trimble Thunderbolt on ebay. I am in need
of an antenna, there are so many on ebay I am not sure which one to get. Maybe
someone could point me in the right direction?
Thankyou
Ken Kubick
kenkub...@hotmail.com
I've been pleased with the performance of the Symmetricom 58532. I believe it
has more gain than many other antennas and my case feeds a lengthy run (maybe
80 feet or so ?) of RG58 whichin turn feeds my Thunderbolt.
--- On Sun, 4/29/12, Ken Kubick kenkub...@hotmail.com wrote:
From: Ken
Hi Ken,
Hi, Time-Nuts guys I just baught a Trimble Thunderbolt on ebay. I am in
need of an antenna, there are so many on ebay I am not sure which one to
get. Maybe someone could point me in the right direction?
Thankyou
Ken Kubick
How long antenna cable do you need in your location?
Just about anything will work. The most important thing, more important
than the type of antenna is LOCATION. If you have a clear view of the sky
and can mount the antenna on a 3/4 galvanized iron pipe mast then the
in-expensive pointy 26dB ant. works well (180518378555) These will
mount
After following Ed Palmer's thread on 304b restoration,I was inspired to
get my GTC (tracor) 304b ser#279 going. It seems that the failure of
this unit was the break down of the foam that was wrapped around the
vcxo located inside the control box. The vapors or the moisture the foam
collected
I recently installed one of the 58532A GPS antennas (this same part
number is applied to both units marked Symmetricom and marked HP and the
data sheets are very similar, though not identical). I'm confident it is
the same antenna as the dimensions and appearance are identical.
I'm using this
Hi,
I received the email below and am passing it on for those who might be
intertested.
Please contact Roland directly, off-list, with any questions, etc.
Best,
-John
=
Used Ocean Optics HR2000 Spectrometer, H9 grating (~200 nm bandwidth,)
calibrated for ~470 to 670 nm, 10
These are so neat I bought two of them. Do you Really wanna see what
your Rb is doing :-)?
Don
J. Forster
Hi,
I received the email below and am passing it on for those who might be
intertested.
Please contact Roland directly, off-list, with any questions, etc.
Best,
-John
Try a bit of the spray foam not actually in the unit.
Since its intended for houses it should be high temp.
Also recall it expands so truly a bit will do.
Can't think of other foam. But I would go to a home depot and look at what
that have for pipes. It may stand up to the heat. Then cut and fit
Yes, very nice pictures. That thing is really built and looks like it
should be easy to work on and experiment with.
I still have to say that I doubt the cavity is off-tune unless
something serious happened to it mechanically. Is it even adjustable?
If so, maybe someone previously tried to
Hi Don,
You know that we're going to be swapping many emails, don't you? :-)
On 4/29/2012 11:16 AM, Donald Henderickx wrote:
After following Ed Palmer's thread on 304b restoration,I was inspired
to get my GTC (tracor) 304b ser#279 going. It seems that the failure
of this unit was the break
The circuit for the Tek 2440 is in the manual.
However, it isnt that well executed.
Relying on the overload recovery of an unclamped jfet input opamp limits
the recovery time and performance as does the unisolated input
capacitance of the opamps used to control the current source transistor
I have a working GTC 304 too. Mine is marked Sperry s/n 002 (!!)
but has another GTC s/n inside the cover. Mine also locks in one
hour, time for the xtal oven to reach temperature.
It is installed in my frequency standards rack at work. If Ed needs
any info, let me know. I never dismounted the
Hi Ed,
On 4/29/2012 12:28 PM, ed breya wrote:
Yes, very nice pictures. That thing is really built and looks like it
should be easy to work on and experiment with.
I still have to say that I doubt the cavity is off-tune unless
something serious happened to it mechanically. Is it even
If the Rb cell drifted enough (maybe if it was filled with water)
to de-tune the mechanical cavity resonator, it wouldn't work at all.
Only a small amount of the RF power in the cavity is coupled into the
Rb gas. The bandwidth of the Rb resonance is a fraction of a Hz (Q in
the millions),
On 4/29/2012 1:36 PM, Ed Palmer wrote:
Thank you Ed,Paul,and Marco for the reply's
The foam I was referring to is or was around ceramic base were the
igniter wire goes . Yes my wire also broke loose however I do not want
to disassemble any more than I have to. I think that just inserting it
I will strongly agree about the cavity and not tuning it. The key is the
multiplication chain and unless the srd is bad the rest of the chains
pretty reasonable in the frequencies used.
Typically a fair amount of power just before the srd.
Regards
paul.
On Sun, Apr 29, 2012 at 4:19 PM, ed breya
Agreed, I picked up a new in box Symmetricom 58532 this winter.
I was very surprised to get a usable signal from indoors (through attic,
shingles, 4 inches of ice and 2 - 3 feet of snow).
From the same room, my SIRFIII based GPSes would take 5 minutes or more
to warm-lock and would randomly
Hi Don,
On 4/29/2012 2:54 PM, Donald Henderickx wrote:
On 4/29/2012 1:36 PM, Ed Palmer wrote:
Thank you Ed,Paul,and Marco for the reply's
The foam I was referring to is or was around ceramic base were the
igniter wire goes . Yes my wire also broke loose however I do not want
to disassemble
On Mon, 30 Apr 2012 06:51:37 +1200, Bruce Griffiths
bruce.griffi...@xtra.co.nz wrote:
The circuit for the Tek 2440 is in the manual.
However, it isnt that well executed.
I like using the 2440 as an example because the design and theory are
readily available online. Its execution only had to be
Curious is the manual online?
Would be interesting to look at.
On Sun, Apr 29, 2012 at 6:33 PM, Ed Palmer ed_pal...@sasktel.net wrote:
Hi Don,
On 4/29/2012 2:54 PM, Donald Henderickx wrote:
On 4/29/2012 1:36 PM, Ed Palmer wrote:
Thank you Ed,Paul,and Marco for the reply's
The foam I was
Hi Ed,
On 04/29/2012 05:46 PM, Ed Palmer wrote:
Hi Magnus,
Second, pictures. If anyone is interested, check out
http://s701.photobucket.com/albums/ww18/edpalmer42/Tracor%20304-B/ .
Nice photos. Thanks. GAS building up.
What does GAS mean?
Gear Acquisition Syndrome.
GAS is a diagnose
Yes, there's a partial copy of the manual online. It's missing a few
schematics, but is otherwise complete.
http://sundry.i2phd.com/ServiceManual_304b.pdf
Ed
On 4/29/2012 5:18 PM, paul swed wrote:
Curious is the manual online?
Would be interesting to look at.
On Sun, Apr 29, 2012 at 6:33
On 2012-04-29 16:21, Magnus Danielson wrote:
Hi Ed,
On 04/29/2012 05:46 PM, Ed Palmer wrote:
Hi Magnus,
Second, pictures. If anyone is interested, check out
http://s701.photobucket.com/albums/ww18/edpalmer42/Tracor%20304-B/ .
Nice photos. Thanks. GAS building up.
What does GAS mean?
Hi
The problem is a bit more complex than simply getting a pulse at the second /
minute. At least back when I last got into this - the pulses need to be the
proper width. In some cases you need pairs of pulses in the right order.
Simple solution - feed the Rb 10 MHz into the clock input on a
Hi all;
Receiving Wildwood NJ GRI 8970 here in northern Indiana again today.
FYI
Rich
- Original Message -
From: time-nuts-requ...@febo.com
To: time-nuts@febo.com
Sent: Sunday, April 29, 2012 8:21 PM
Subject: time-nuts Digest, Vol 93, Issue 152
Send time-nuts mailing list
On 4/29/2012 6:27 PM, Ed Palmer wrote:
Yes, there's a partial copy of the manual online. It's missing a few
schematics, but is otherwise complete.
http://sundry.i2phd.com/ServiceManual_304b.pdf
Ed
The bottom pin is not chassis ground,on this unit.
The foam looked original before in
Rich, Thanks for the heads up. I will turn stuff back on.
Stan, W1LE Cape Cod FN41sr
On 4/29/2012 8:26 PM, Rich and Marcia Putz wrote:
Hi all;
Receiving Wildwood NJ GRI 8970 here in northern Indiana again today.
FYI
Rich
___
time-nuts
Hi Don,
On 4/29/2012 6:41 PM, Donald Henderickx wrote:
On 4/29/2012 6:27 PM, Ed Palmer wrote:
Yes, there's a partial copy of the manual online. It's missing a few
schematics, but is otherwise complete.
http://sundry.i2phd.com/ServiceManual_304b.pdf
Ed
The bottom pin is not chassis
A first-class engineered unit will have a single point where the chassis
and circuit grounds tie together, Sometimes it's a panel, where the i/o
connectors are coaxial. I've fixed units with good engineering and
sloppy construction where accidental extra common points have caused
problems.
The
Bruce wrote:
The essentials of a Wikinson TDC can be simplified to the attached
circuit which only requires the addition of a zero crossing
comparator to monitor the voltage across the capacitor C1.
A few refinements to improve the capacitor charging current
switching transitions and the
Hi Time-Nuts guys, I was reading the Trimble Thunderbolt manual section 2.1.3
(Antenna Cable). Trimble recommends using RG-59 cable which is 75 ohm coax.
Is this a typo or is this correct? I thought that the Trimble Thunderbolt
would use a 50 ohm cable and antenna.
Thankyou
Ken Kubick
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