Greetings To All,
Please accept my apologies in advance if this is off-topic. I have just
acquired an aircraft clock, which I've tentatively identified as coming from
a Boeing 747. It's way cool looking and would make a perfect dust collector
in my ham shack if I could only power it up.
T
Hi Glenn:
Yes, I've thought about doing that, but then priced a small Pomona box
at $50 and thought just getting the proper antenna would be easier and
not that much more money.
Have Fun,
Brooke Clarke
http://www.prc68.com
Glenn Little WB4UIV wrote:
You could put a regulator on the voltag
You could put a regulator on the voltage line for the antenna so that
you could use a 5 Volt antenna.
This would get you away from the specific voltage requirements for
their antenna.
73
Glenn
WB4UIV
At 09:54 PM 5/20/2009, you wrote:
Hi:
I just got an Ashtech Z-12-R Reference Station and i
Hi:
I just got an Ashtech Z-12-R Reference Station and it needs the subject
antenna.
http://www.prc68.com/I/AshtechZ12.shtml
I've got a bunch of GPS antennas but none with the needed combination of
features. It would be good to learn which antennas are 10 Volt types.
For example is the Tr
I have done quite a bit of work replacing fans in old equipment with modern
fans. I have never seen a case where replacing a hurricane level fan with a
whisper quiet fan made any real difference in the cooling inside the unit...
typically one sees less than +/- 5C difference anywhere inside t
folk...@vanheusden.com said:
> Could not find any help anywhere on the web so you guys are my last
> hope. I have 2 computers running a linux PPS enabled kernel and ntp.
> One of the two has a garmin 18 lvc, one has a garmin 18x lvc.
You will probably get better help with NTP related issues from
Hi,
Could not find any help anywhere on the web so you guys are my last
hope.
I have 2 computers running a linux PPS enabled kernel and ntp.
One of the two has a garmin 18 lvc, one has a garmin 18x lvc.
The one with the 18 lvc is neatly synced:
remote refid st t when poll reac
When I have been concerned with 'stealing' power, I have used
a switching power supply wall wart. Small and are usually quite
efficient. One model a Sony (branded), the chip inside even had
a opto isolated control pin so it could be turned on/off via
logic.
-pete
>
>
> Yes, I have replaced the
On 5/20/09 9:18 AM, "Roy Phillips" wrote:
> Mark
> Thanks for your comments. I suspect that there was a period when the "Papst"
> fan was the de facto standard in many equipments, it has considerable depth
> and obviously moves a lot of air.
There is no real correlation between noise level an
Hi John and the group,
Yes you're right modifying the airflow of these old mummies isn't a good
idea, their "life" and reliability will be reduced drastically.
Thanks for the paper you pointed to on Greenhall, I'll read very carefully
to it.
It would have been good to be able to do Allan de
The fan in the 5370x & other counters is bolted directly to the
chassis. I've found that it can be isolated by rubber grommets
from the chassis yielding a significant reduction in noise. Some
adhesive backed foam (weather-stripping) is needed around the
chassis opening to seal up the bypass path
Mark
Thanks for your comments. I suspect that there was a period when the "Papst"
fan was the de facto standard in many equipments, it has considerable depth
and obviously moves a lot of air. I can certainly see the need in the case
of Power Supplies, I have an HP6632A which can provide 100 wat
Some other useful mods to the 5370 (besides a quiet fan):
1) I install a tiny toggle switch on the oscillator board to disable that
LED/freq detector circuit. The switch lets you re-enable it for testing, etc.
2) Drill a hole in the top cover directly above the oscillator tuning screw.
This
Yes, I have replaced the fans in four 5370A and 5370B counters with modern 12V
brushless DC motor units connected to the 10V supply. VERY nice and quiet. I
did before and after thermocouple tests in the chassis. The temperatures were
basically unchanged (+/- 3C). Variances could easily ha
I think the problem with gold contacts for connector junctions and
solder connections was already discussed a while ago.
I have no experience with the mentioned 5370A problem,
but I may give general remarks out of my experience on similar things.
Gold is a very good but expensive material for
Bruce/Magnus
Thank you for your comments.
Roy
- Original Message -
From: "Bruce Griffiths"
To: "Discussion of precise time and frequency measurement"
Sent: Wednesday, May 20, 2009 12:42 AM
Subject: Re: [time-nuts] HP 5370B vs SR620
Hej Magnus
One issue is that the SR620 is still
Hi,
I do have a HP5335A and after the many comments
about the 5370 I'm curious if there is something
I'd be better off with the 5370 instead of my 5334
I've read the specs of both but... better ask
the experts ;-)
Luis Cupido.
ct1dmk.
___
time-nuts m
Hello Roy,
Yes these fans from these old mummies are really too noisy.
I've several counters: two EIP 578, this 5370B and an ADVANTEST 5372P, the
quietest is really the ADVANTEST.
I've also a bunch of other T&M intruments and it's impossible to have all of
these up and running. Really too noisy
Hi Ulrich,
Yes I'm frenchy but I use an NI USB/GPIB adaptor I've since a while, not
this exotic ALCIOM...
Best 73's
pf, F5BQP
Message: 4
Date: Wed, 20 May 2009 11:07:26 +0200
From: "Ulrich Bangert"
Subject: Re: [time-nuts] 5070B once more
To: "'Discussion of precise time and frequen
> Has anybody tried to replace these
> fans with a
> more modern type (12/24 volt). I'm sure the designers were being very
> proper, but I cannot believe that a counter should require such a large
> volume of air moving through it ?
> I have an EIP 545 Counter and
> an HP 5335A
> which both have Pa
I don't know this product, but from my past experience if it has a split
primary transformer for switching between 115 and 230 VAC, check to see if
fan is 115VAC. If it is and you run unit on 230VAC, the fan can cause
increased residual noise due to the imbalance. Better to use a 230 VAC fan
if run
Hello,
The Wavecrest DTS uses a large airflow to keep temperature >differences<
small enough for low tempco in the interpolators. This can also be the
case for the hp5370, thus be carefull.
henk
> Hello Pierre-François
> A point of personal interest in your email - - The noise of the fan in
>
Hello Pierre-François
A point of personal interest in your email - - The noise of the fan in the
5070B, this would appear to be a problem with a number of the older items of
Hewlett Packard, and other manufacturers.
The items are usually fitted with a Papst fan,with a high throughput of air
Pf,
> I've on a
> dedicated PC (XP) a GPIB/USB adapter for this application.
> Could you tell me which sw I could use to do this?
since you own a French callsign chances are that you are talking about the
SMART488 from ALCIOM. In this case I have no help available. Should you
however talk abou
Hi The Gang,
I've revitalized my 5070B I got few years ago and since a week or two it has
seen again passing into it few electrons after so long... lol...
Now I'm wondering which software I could use to grab data from it to the PC and
then to analyze the buffers to see the stability of my rubidi
Gentlemen,
a new version of EZGPIB is available for download at
http://www.ulrich-bangert.de/html/downloads.html
which includes a MRU file list and a print option for the source editor
window that makes use of the color syntax highlighting.
Have fun
Ulrich Bangert
www.ulrich-bangert.de
Orthol
> For a cheap (slightly)longer term fix, wipe the IC pins
> with a swab moistened with WD40!
BALLISTOL is also recommended for that job.
Best regards
Ulrich Bangert
> -Ursprüngliche Nachricht-
> Von: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] Im Auftrag von Rober
27 matches
Mail list logo
