Brooke,
Following the links from your page (nice work, thank you) lead me to your
Thunderbolt page where you ponder the death of your iCruze monitor.
If you refer to the picture of the microprocessor board, you will notice that
the locations marked D1, D2 and D3 are populated by zero ohm
If you refer to the picture of the microprocessor board, you will
notice that the locations marked D1, D2 and D3 are populated by zero
ohm resistors. That means that the 3 V microcontroller was powered
from 5V. I am actually amazed that they worked at all, let alone
worked for a while.
It is a
Hi
The heat gun approach assumes that the fault is a blob of metal that is stuck
in a bad location in the bulb. Unfortunately there are a lot of different ways
these beasts can die. The repair guys who should know always claimed that bulb
issues were 30% of the issues they saw. That was on an
Glenn
I want to say that my simple wwvb clocks are working. However my most
finicky one is not locked as I just noted. But then its always a problemed
child.
The format contains bpsk but that was not supposed to interfere with the
traditional AM modulation these clocks detect.
I might strongley
Hi Paul,
the phase modulation would interfere with the AM, since during the phase
change the narrow band crystal filter's output will sink down as the
filter is following the phase change, and the time needed for the filter
to swing in to the new phase it depend on the angle of the phase
Good day all,
I have been following the discussions as best as I could. I recell seeing
the question asked or at least theorized as to what is the power
requirements of these units - either individually or together.
I have reviewed all messages or at least all that I can find in these
threads
At most you need 2.4A (when the two OCXOs are heating up): a 2.5A
supply is needed.
On Fri, Nov 21, 2014 at 6:25 PM, planoph...@aei.ca wrote:
Good day all,
I have been following the discussions as best as I could. I recell seeing
the question asked or at least theorized as to what is the
Bob
Absolutely lots of ways to die. Such as bad caps, bad variable cap,
resistors that are cooked. I am pretty good with all of those and have
experienced most of them. But then comes the point of the dirty bulb and it
doesn't have to be the blob. Though you will find the blob most likely with
I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I
have not seen my units draw more than 2A each - steady state is about 1.1A.
Anthony
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
planoph...@aei.ca
Sent: Friday, November
I think Bob mentioned it before Laptop power supplies make good power
sources. Older units like in my case an old Dell 20V 3.5 A is perfect. They
still have plenty of input and output filtering and build for lomg term
operation. Never throw away a laptop supply. Late models are lower power
I am looking for a microwave frequency counter and won an auction for an 18
GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for
that.
I also have the chance to get a 5352B 40 GHz counter for £500. That has
GPIB as standard.
In the short/medium term I don't see much use for a
David a free opinion and thats about what its worth.
The 5342 counter was a good counter but very old now.
I used to use the 5342s for satellite work and always wanted one for home.
But given its age circa 1980 I believe, maybe it works or not at all
frequencies.
I would simply go with the 5352b
Hi
I have run mine from anything from 22V to 30V and seen no problems. I had
trouble on a pair with a 2A 24V supply. The pairs seem to settle down to about
1A at 30V after warmup in my lab.
The supplies are rated to 18V input. I would not trust them at that low a
voltage. There are some
On 21 Nov 2014 23:24, Doug dmcgarr...@optonline.net
[hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote:
On 11/21/2014 04:51 PM, 'Dr. David Kirkby (Kirkby Microwave Ltd)'
drkir...@gmail.com [hp_agilent_equipment] wrote:
I am looking for a microwave frequency counter and won an
Just to clarify, each unit (no more than 2 and steady about 1.1A) or
both units together?
cheers, Graham ve3gtc
On 2014-11-21 12:50, Anthony Roby wrote:
I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I
have not seen my units draw more than 2A each - steady state
Hi
Tearing the physics package apart and putting it back together again can be a
bit of a hassle on the small Rb’s …
Bob
On Nov 21, 2014, at 2:00 PM, paul swed paulsw...@gmail.com wrote:
Bob
Absolutely lots of ways to die. Such as bad caps, bad variable cap,
resistors that are
Hi
A bit over 2A for the pair at turn on. About 1A for the pair after warmup.
Bob
On Nov 21, 2014, at 6:23 PM, Graham planoph...@aei.ca wrote:
Just to clarify, each unit (no more than 2 and steady about 1.1A) or both
units together?
cheers, Graham ve3gtc
On 2014-11-21 12:50, Anthony
After regrettably selling my 5370B a few years ago, I decided to look for a
used SR620.
Are there any particular issues with these that could be tested by the
seller prior to shipping it? I have not downloaded the manual yet, but I
assume there's a basic test in there - probably similar to that
what is the ublox application
Thanks,
Jim
wb4...@amsat.org
On 11/20/2014 6:17 PM, S. Jackson via time-nuts wrote:
Paul,
if you set the serial switch on the LTE-Lite over to the NMEA side then the
uBlox application will give you all sorts of bar graphs for signal
strengths, position,
So, I got a reasonable deal on a SR620 ho ho. Know your dealer. The ocxo is
out of tolerance. All self tests pass with flying colors, autocal works as
well. So the best parts are OK.
Does anyone:
1) have a spare Isotemp OCXO36-53 10.000 MHz p/n 6-00051?
2) know the specs, ie the input
U-Center vers 8.12
http://www.u-blox.com/en/evaluation-tools-a-software/u-center/u-center.html
Mike
---
73,
Mike, N1JEZ
A closed mouth gathers no feet
On 2014-11-21 18:54, Jim Sanford wrote:
what is the ublox application
Thanks,
Jim
wb4...@amsat.org
On 11/20/2014 6:17 PM, S. Jackson
Hi
The counter has a fairly extensive auto-cal / auto test built into it. Simply
looping the output back to the input is about all the setup needed. Checking
the calibration on the OCXO is the only thing that takes external gear.
Past that, yes there are a variety of calibration settings and
Dr. Kirby,
The 5242A Option 001 (high stability) used a 10544 oscillator, which. IIRC,
is electrically interchangeable with the 10811.
The 5352B Option 010 (high stability) uses the 10811 oscillator.
Cheers,
Dave M
Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
I am looking for a microwave
Hi
I believe that the SR620 uses a “true” 10 MHz OCXO. I would be careful using a
5 MHz doubled to 10 OCXO. The counter may or may not be happy with sub-harmonic
induced jitter.
Best bet at the specs:
+12V power
0-5V EFC
Sine wave out +7dbm
+/- 5x10^-9 0 to 70C
Pinout - trace what you
Hi
On Nov 21, 2014, at 6:28 PM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
On 21 Nov 2014 23:24, Doug dmcgarr...@optonline.net
[hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote:
On 11/21/2014 04:51 PM, 'Dr. David Kirkby (Kirkby
I drive my prs10 with a parallel pair of ldos balanced by an op amp. I'll
draw it out and post it if you like.
On Friday, November 21, 2014, Azelio Boriani azelio.bori...@gmail.com
wrote:
At most you need 2.4A (when the two OCXOs are heating up): a 2.5A
supply is needed.
On Fri, Nov 21, 2014
I have one of the source locking EIP, which works up to 90GHz, but
used only for 60,xx GHz only, they are sometimes relative inexpensive
available on e-bay, see here:
Hi
We’ve been around this one before. The KS boxes are powered by a switcher brick
inside the box. There’s not a lot of reason go super crazy on the DC input.
It’s fully isolated from the case ground. Even leakage / stray grounds should
not be an issue in this situation. I would not run it off
The SR620's manual is perfect, there is a whole chapter has detail information
of performance test. You can use that way for check the counter's condition.
Hui Zhang
At 2014-11-22 07:51:41, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
Hi
Probably the best information out there on setting up a SR620 is buried in the
archives of this list back a few years. The back and forth required on some of
the adjustments is far from obvious. You do need to start from the manual and
get it as far as the manual will allow. You then go
The manual stated HP5342A have a option 001, it's a HP10544 OCXO with PC card
connector(A24), but when I opened my HP5342A, there is very limited space, I
doubt it's whether can contain a big 10544 OCXO in there. So I always use a
external 10MHz to feed my counter.
Hui Zhang
At
Hi David:
I like it. Traded an HP 53132 (user hostile menu system, an the 12 digits per second applies only to frequency, not
time) for it.
http://www.prc68.com/I/TandFTE.shtml#SR620
Fast precision measurement ( 1ps, 12 digits/sec) hint:
http://www.prc68.com/I/FTS4060.shtml#SR620Fast
Hi Bob:
I agree with you. But the chapter is a easy way to check your new counter
when it arrived, and it's not only a calibration of just self test, it's
testing counter's performance on some level.
Regards.
Hui Zhang
At 2014-11-22 10:22:53, Bob Camp kb...@n1k.org wrote:
Hi
Hi
If I follow your hint:
I set the 620 up for a 1 second gate and then I ask for an average of 1,000
readings. This takes 1,000 seconds?
Bob
On Nov 21, 2014, at 9:32 PM, Brooke Clarke bro...@pacific.net wrote:
Hi David:
I like it. Traded an HP 53132 (user hostile menu system, an the
Hi
From what I’ve seen, many 620’s that have been sitting for a few years will
not operate until the calibration procedure is run. They drift far enough out
that they pitch errors trying to do simple things. Let the beast warm up for
an hour and run the cal as soon as you get a used one.
Bob
I finally got the time tagging fpga I was playing with to a semi-usable
state. I mentioned in an earlier post that I was unable to compile or
link the FTDI library but Magnus Karlsson very kindly rewrote a program
of his to provide me with a utility to set up the USB asynchronous
parallel
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