Looking for a few Lady Heather users to stress-test the new TSIP-to-IP
gateway in the upcoming 3.00 release. If you install this beta of the
Windows version:
http://www.ke5fx.com/heather/beta.exe (1 MB)
... you'll see an icon called "KE5FX Thunderbolt." This will launch Heather
with the
Bruce Griffiths wrote:
Ed
Given that the divider load current, if one substitutes a 5V CMOS
flipflop for the 7474, only increases to about 5mA pp, using a 74HC74
is probably prudent given the PCB layout used, in that it may avoid
EMI issues that may be a problem with faster logic. However it
Ed
Given that the divider load current, if one substitutes a 5V CMOS
flipflop for the 7474, only increases to about 5mA pp, using a 74HC74 is
probably prudent given the PCB layout used, in that it may avoid EMI
issues that may be a problem with faster logic. However it may then be
prudent to
Since the T13-1 has a centre tapped secondary there are 2 useful
amplifier configurations that can be used.
One has a nominal gain of about 5dB whereas the other has a gain of
around -1dB (can still be useful since the amplifier input impedance at
10Mhz is about 1k when the 51 ohm input shunt re
I'll extend the webpage (in the next few days) to include more
variations of the circuit as well as the associated LTSpice schematic files.
However at some stage a breadboard is necessary to validate the
simulations, in particular the effect of transformer parasitics.
I have done some simulations
I was wondering about that transformer. Thanks for the cross-reference.
Ed
John Miles wrote:
Ed
If it helps I can send you some LTSpice schematics so that you can
simulate the circuit for yourself.
The breadboards behave as predicted by the simulations at 10MHz.
John Miles has done some prel
The schematic is available here:
http://www.murgatroid.com/t_and_m/hp-00105-6100-figs.pdf . It's also
available with circuit description & waveforms here:
http://www.kennethkuhn.com/hpmuseum/scans/hp5065a_part3.pdf on pages
93-101 (pdf pages - not document pages). However, this copy doesn't
That would help. Perhaps they should be added to the web page. I'm
sure that I'm not the only one who would be interested.
Ed
Bruce Griffiths wrote:
Ed
If it helps I can send you some LTSpice schematics so that you can
simulate the circuit for yourself.
The breadboards behave as predicted
Just read an Interesting article in the IEEE Circuits and Systems Magazine for
this Quarter (Vol9 Num 4)
Shows an Implementation of A complete GPS Receiver using Simulink.
It also has a number of web links to Open Source GPS software which might be of
Interest to this group. One is http://home
> Ed
>
> If it helps I can send you some LTSpice schematics so that you can
> simulate the circuit for yourself.
> The breadboards behave as predicted by the simulations at 10MHz.
>
> John Miles has done some preliminary phase noise measurements on his
> version.
>
> The transformers are wound on
pisym...@gmail.com said:
> What are my options in this realm? Surprisingly enough, Googling for
> over an hour didn't yield much results. There are tons of companies
> that offer various solutions but with little pricing information. I'd
> be happy to hear some suggestions OTHER THAN the Garmin
Scott Mace wrote:
On 12/07/2009 04:13 PM, Alexander Sack wrote:
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and it
seems
that a lot of folks have used the Garmin 18x LVC as their 1PPS sync
for the
desktop with varied success (5V via USB port and RS-232 for 1P
Alexander Sack wrote:
On Mon, Dec 7, 2009 at 6:07 PM, Bruce Griffiths
wrote:
Alexander Sack wrote:
On Mon, Dec 7, 2009 at 5:20 PM, Bruce Griffiths
wrote:
Alexander Sack wrote:
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and
If you send me the schematic for the circuit in which its used I can
answer that question better.
Bruce
Ed Palmer wrote:
Perhaps, but given what it's replacing and what it's driving, is the
difference significant?
Ed
Bruce Griffiths wrote:
Ed Palmer wrote:
Yes, I have the same configuratio
Ed
If it helps I can send you some LTSpice schematics so that you can
simulate the circuit for yourself.
The breadboards behave as predicted by the simulations at 10MHz.
John Miles has done some preliminary phase noise measurements on his
version.
The transformers are wound on binocular fer
On 12/07/2009 04:13 PM, Alexander Sack wrote:
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and it seems
that a lot of folks have used the Garmin 18x LVC as their 1PPS sync for the
desktop with varied success (5V via USB port and RS-232 for 1PPS?). At
work, I have
On Mon, Dec 7, 2009 at 6:07 PM, Bruce Griffiths
wrote:
> Alexander Sack wrote:
>>
>> On Mon, Dec 7, 2009 at 5:20 PM, Bruce Griffiths
>> wrote:
>>
>>>
>>> Alexander Sack wrote:
>>>
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and it
seems
>
Perhaps, but given what it's replacing and what it's driving, is the
difference significant?
Ed
Bruce Griffiths wrote:
Ed Palmer wrote:
Yes, I have the same configuration. The part number for the divider
board is 05061-6165. The 10811 + daughter boards are used in the
105B, 5061B Cesium, a
Thanks Bruce. This is the kind of info I was looking for. I'll have to
study your schematics. The purpose of much of it isn't immediately
obvious. :-)
Ed
Bruce Griffiths wrote:
Ed Palmer wrote:
I have a late-model 105B Oscillator that's equipped with a
10811-60109 oscillator. It seems a
Ed Palmer wrote:
Yes, I have the same configuration. The part number for the divider
board is 05061-6165. The 10811 + daughter boards are used in the
105B, 5061B Cesium, and the 5065A Rubidium. The circuit loading
problem is exactly the kind of issue I was expecting. Thanks for the
warning
Alexander Sack wrote:
On Mon, Dec 7, 2009 at 5:20 PM, Bruce Griffiths
wrote:
Alexander Sack wrote:
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and it
seems
that a lot of folks have used the Garmin 18x LVC as their 1PPS sync for
the
desktop with vari
Yes, there's lots of possibilities if I go external. But I'd rather go
back to the 10 MHz source rather than multiply back up to get to 10 MHz.
Thanks for the suggestion,
Ed
J. L. Trantham, M. D. wrote:
The 5087 distribution amplifier designed to go with the 105B has an option
for a 5 to 10 M
Yes, I have the same configuration. The part number for the divider
board is 05061-6165. The 10811 + daughter boards are used in the 105B,
5061B Cesium, and the 5065A Rubidium. The circuit loading problem is
exactly the kind of issue I was expecting. Thanks for the warning. I
could probabl
On Mon, Dec 7, 2009 at 5:20 PM, Bruce Griffiths
wrote:
> Alexander Sack wrote:
>>
>> Hi Everybody:
>>
>> First post, be gentle. I did some mail-list archive searching and it
>> seems
>> that a lot of folks have used the Garmin 18x LVC as their 1PPS sync for
>> the
>> desktop with varied success (
>
> (btw is there such a thing as a desktop rubidium atomic clock with 1 PPS?)
Stanford Research prs10 (List $1495) is a building block
FS725 is a fancier version in a box with power supply, 1pps in and out, 5 and
10 MHz etc, RS232 interface, etc. List about $2500.
http://www.thinksrs.com/pr
Depending on what you want to do and which performane is to be achieved, the
first thing I woulsd do is to look at the 5061B manual.
Best regards, Hubert
-Ursprüngliche Nachricht-
Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im
Auftrag von Bruce Griffiths
Gesendet: M
Alexander Sack wrote:
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and it seems
that a lot of folks have used the Garmin 18x LVC as their 1PPS sync for the
desktop with varied success (5V via USB port and RS-232 for 1PPS?). At
work, I have experience with an Endr
Corby Dawson wrote:
Ed,
The easiest way is to couple out the 10Mhz from the two pins on the
connector holding the 10811 into a Fet input buffer amplifier that can
drive 50 ohms.
There are lots of FET buffer schematics floating around.
Try the radio amateurs handbook or google it.
Good Luck!
Hi Everybody:
First post, be gentle. I did some mail-list archive searching and it seems
that a lot of folks have used the Garmin 18x LVC as their 1PPS sync for the
desktop with varied success (5V via USB port and RS-232 for 1PPS?). At
work, I have experience with an Endrun Cf/Ct receiver connec
Ed,
The easiest way is to couple out the 10Mhz from the two pins on the
connector holding the 10811 into a Fet input buffer amplifier that can
drive 50 ohms.
There are lots of FET buffer schematics floating around.
Try the radio amateurs handbook or google it.
Good Luck!
Corby Dawson
_
I did something similar to my HP 5065A Rb standard, which had a 10811A
and a small plug-in card that was a digital IC doing a divide by two
followed by a simple LC filter. I picked off the signal right at the
chip input with a small cap and a piece of RG-174 that went to a buffer
amplifier (I
Boy, does that bring back memories! I have had a bunch of SCSI drives with
this problem. One drive in particular was so bad that I had to use a plier to
free the spindle (about 1/4" was exposed for a grounding tab). I couldn't
afford a replacement at the time, so I kept hoping it would keep
Ed Palmer wrote:
I have a late-model 105B Oscillator that's equipped with a 10811-60109
oscillator. It seems a shame to have that nice 10 MHz source without
having access to it. I was thinking of adding a buffer amp and
bringing out the 10 MHz signal. It shouldn't be too hard, but before
I
I was thinking more along the lines of an analog buffer, but you make a
good point. And if I want a sine wave output, I could use a simple pi
filter to clean it up. I have an HP 8647A RF generator that does
exactly that on the 10 MHz reference output.
Thanks!
Ed
john.fo...@gmail.com wrote:
The 5087 distribution amplifier designed to go with the 105B has an option
for a 5 to 10 MHz doubler card. You might look at doing something external.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Ed Palmer
Sent: Monday, December
That makes sense. I have seen then inside some HP datacomms test gear. This is
of course the first through forth photos. The others are inserts for multiway
connectors. Very hard to tell which. Some manufacturers use the same coax
insert across different shells e.g. "D" type and DIN41612. Some u
Ed,
I have seen a hex schmitt trigger inverter used for this.
The output of the OXCO goes into all 6 schmitt rigger inverter inputs and then
on the output side you have the output leg of each inverter connected through
300 ohm resistance. Thusly you get 6 hex schmitt trigger inverters wired in
I have not but agree its not very hard to do. Just depends on the quality of
the buffer amp you want to use and the addition of a connector or two.
On Mon, Dec 7, 2009 at 12:03 PM, Ed Palmer wrote:
> I have a late-model 105B Oscillator that's equipped with a 10811-60109
> oscillator. It seems a
I have a late-model 105B Oscillator that's equipped with a 10811-60109
oscillator. It seems a shame to have that nice 10 MHz source without
having access to it. I was thinking of adding a buffer amp and bringing
out the 10 MHz signal. It shouldn't be too hard, but before I reinvent
the wheel
> I have recently acquired a number of nice coax parts, but I'm not sure
exactly what connector types they are. If anybody can help me identify
them, I'd appreciate it!
>
> First, are these spiffy jacks. They look somewhat like SMB, but are too
large as far as I know. Too small for BNC, and there's
I haven't been following the recent disk drive thread but the
mention of grc.com on this list makes me cringe. Steve Gibson is the
kind of guy who has just enough knowledge about any given subject to
be dangerous. See for example [1] and specifically [2] in this case.
I have never used Spinrite b
Hi Peter I would confirm Robert's suggestion. To drag this onto topic :-)) I
have here some pcbs from an HP 3701 circa 1972 . The cat says it was a radar
transmission test set amd the pcbs are IF amps around 300 to 400MHz which have
these connectors fitted to the boardsso hide them away safe
Hi Glen,
Looks indeed like an SMP but I believe it
is a siemens 1.0/2.3 used on the DIN41612
backplanes (note the retention spring in the back
to allow them to lock inside the 41612/M connectors
shell).
Luis Cupido.
ct1dmk.
p.s. don't know if 1.0/2.3 connectors will
mate with SMP or not.
Glen
The larger push on connector is an SMP.
This is used a lot in microwave for IF cables.
This is a 75 Ohm connector.
73
Glenn
WB4UIV
At 03:38 AM 12/7/2009, you wrote:
I have recently acquired a number of nice coax parts, but I'm not
sure exactly what connector types they are. If anybody can help
Hi Robert,
... 43 or BT43 (BT=British Telecom) is a private
reference only for British. hi ;-)
It is 1.6/5.6 for the rest of us.
(patent is siemens afaik)
Luis Cupido.
ct1dmk.
Robert Atkinson wrote:
Hi Peter,
They are Type 43 or BT43 connectors. 75R used in telecomms digital equipment in
Eu
Good Morning Pete,
The last one looks to be a single contact of a multipin connector,
custom of course.
The locking prongs on the outside are the direct indicator that it fits
permanently into something.
The others are odd ball to me and my collection. But, the manufacturer
is stamped on the
Hi Peter,
They are Type 43 or BT43 connectors. 75R used in telecomms digital equipment in
Europe.
Robert G8RPI.
--- On Mon, 7/12/09, Peter Loron wrote:
From: Peter Loron
Subject: [time-nuts] Help identifying coax connector type
To: "Discussion of precise time and frequency measurement"
Dat
Hi All
Following a request on the Manual Exchange group I've uploaded the manual
for the Sigem SGM5610 GPS module to Rapidshare so just thought I would also
mention it here in case anyone else would like a copy.
After a boom start Sigem went into receivership but was reborn as Mobile
Kn
I bought a copy of Spinrite and it recovered
a drive that wouldn't boot.
When rebuilding my PCs, I run Spinrite on the
drives to make sure a drive is not failing.
I've used it to decide when to retire my HDs.
It's been months since I've used it, I should
probably do a preemptive run, but on lar
For many "failed" hard drives, it's not a "hardware" failure at all, but
a very corrupted data surface, rendering even the drives own error
recovery useless, so the OS won't boot, or comes up in "an altered
state" or similar woe.
If the drive spin's up, and you can see it OK in the list of devices
Hi Pete,
> http://www.flickr.com/photos/24004...@n03/4165122541/
This looks a bit like a coax for the hybrid d-sub connectors. (As used for
RF in the connector for FRS-C/PRS10-rubidiums. And ofcause old Sun
SS-video connector.)
http://www.amphenol-online.com/NavData/Catalogs/TW%20Hybrid%20Dsu
The 'spiffy jacks' are standard european 1.6/5.6 coax connectors- 75
ohm -They used to be widely used on 2MB/s etc test equipment and
distribution frames. Still fairly common in some parts of the
telecommunications world. Used to be a threaded version as well as the
push-on version in your pict
I have recently acquired a number of nice coax parts, but I'm not sure exactly
what connector types they are. If anybody can help me identify them, I'd
appreciate it!
First, are these spiffy jacks. They look somewhat like SMB, but are too large
as far as I know. Too small for BNC, and there's n
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