Thanks Tim.
All the best
Mark Spencer
m...@alignedsolutions.com
604 762 4099
> On May 9, 2018, at 5:38 PM, Tim Tuck wrote:
>
> Hi Mark,
>
> this is a product of Glen VK1XX.
> he will have a website with eCommerce up soon and when that happens I will
> announce it to the
Hi would anyone be able to point me (off list) in the direction of a bit more
information re this device ?
Many thanks
Mark S
m...@alignedsolutions.com
604 762 4099
> On May 8, 2018, at 12:15 AM, Tim Tuck wrote:
>
> Hi Pete,
>
> You probably want this...
>
> https://github.com/glenenglish
ly need an
accurately surveyed starting point.
Mark Spencer
m...@alignedsolutions.com
604 762 4099
> On Apr 25, 2018, at 8:06 AM, George Watson wrote:
>
> Create your own DGPS?
>
> Trimble is good at this.
>
> George K. Watson
> K0IW
>
>> On Apr 25, 2018, at
Yes I actually purchased two such devices from Ebay a while back. (They
contained nice PRS10 Rb oscillators.)
Mark Spencer
Aligned Solutions Co.
m...@alignedsolutions.com
604 762 4099
> On Mar 31, 2018, at 12:09 PM, Ruslan Nabioullin wrote:
>
>> On Sat, Mar 31, 2018 at 9:38 A
I've experienced this with products with simple crystal oscillators. (Ie. Tap
or bang the unit to get the oscillator to start oscillating.)
Mark Spencer
m...@alignedsolutions.com
604 762 4099
> On Oct 16, 2017, at 1:10 PM, Vlad wrote:
>
>
> Hello,
>
> I am wande
Although not time nuts related I believe this document speaks to some of the
practical issues...
http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-6297.pdf
Mark Spencer
m...@alignedsolutions.com
> On Sep 3, 2017, at 4:56 PM, Mark Sims wrote:
>
> Real time nuts run phase sta
Hi.
The last time I looked at upgrading my GPS antenna feed line (I'm currently
using RG58 style cable) I spent some time looking at the temperature vs
propagation delay characteristics of various cables.
I also picked up a spool of cloned "LMR400 style" cable but ended up using that
for my am
Nice post Tom. I was also wondering about the replacement hardware vs software
patch issue. Just speculation on my part but perhaps changing the software
involves an extensive QA / test process, vs swapping out a piece of hardware ?
Again this is just pure speculation on my part.
Mark
SMA connectors for example.
The issue of power connectors with locking devices is also in my view quite
relevant to time nuts. The dialogue vis a vis power pole connectors has also
been one of the best I have ever seen on the Internet.
Thanks all
Mark Spencer
m...@alignedsolutions.com
&g
duct available from ITT
> Cannon as well as AMP.
>
> Cheers,
> Magnus
>
>> On 06/22/2017 08:42 PM, Mark Spencer wrote:
>> Sorry if I have caused any un due confusion thru my perhaps incorrect use of
>> the terms "cannon" and "XLR."
>> The gree
ate female contacts was what I perhaps incorrectly referred to as a "XLR"
connector.
Both were in use in my lab powering time nuts gear.
Mark Spencer
m...@alignedsolutions.com
___
time-nuts mailing list -- time-nuts@febo.com
To uns
encountered equipment that allowed for that specific use case
via hermaphroditic connectors. It is still a good point however.
Mark Spencer
m...@alignedsolutions.com
604 762 4099
> On Jun 22, 2017, at 9:25 AM, Richard (Rick) Karlquist
> wrote:
>
> No one has brought up
I believe the "AMP" connectors you are referring to are what I would call a
"Cannon" connector. A good choice for that application IMHO.
Mark Spencer
m...@alignedsolutions.com
> On Jun 22, 2017, at 6:47 AM, Bob Bownes wrote:
>
> Right Tool for the Job.
>
This good information. Thanks
Mark Spencer
m...@alignedsolutions.com
> On Jun 22, 2017, at 7:27 AM, Mike Seguin wrote:
>
> NL2 etc 40A
>
> They typically run about $3 per connector. I use them on high power Solid
> State amps. (VHF and up)
>
> Mike
>
>
some applications.
I strongly dislike the use of "phono plugs" and PL259 connectors for power
supply applications.
All the best
Mark Spencer
m...@alignedsolutions.com
> On Jun 22, 2017, at 5:57 AM, Wes wrote:
>
> Hi Tom,
>
> I said I use PPs but I don't
e but for my hobby use it seems to work ok for me.
I've more or less shelved my plans to discipline one of my high end OCXO's via
a home brew GPSDO scheme.
Mark Spencer
> On Mar 14, 2017, at 5:24 PM, Bob Camp wrote:
>
> Hi
>
>
>> On Mar 14, 2017, at 6:33 PM, T
>From occasional observations of my IPhone 5 using the emerald sequoia emerald
>time application the "within 50 milliseconds" claim seems quite reasonable to
>me.
Mark Spencer
> On Mar 16, 2017, at 12:31 PM, Chris Albertson
> wrote:
>
> Apple Support claims
but in my experience it seems to have fallen out of common use these days.
All the best
Mark Spencer
> On Jan 14, 2017, at 11:02 AM, Bob Camp wrote:
>
> Hi
>
>
>> On Jan 14, 2017, at 1:38 PM, Chris Albertson
>> wrote:
>>
>> On Sat, Jan 14, 2017 at
as a "figure of merit."
Best regards
Mark Spencer
Sent from my iPhone
> On Jan 13, 2017, at 12:35 PM, Bob Camp wrote:
>
> Hi
>
> What standard protocol would you recommend I run from the command line on my
> computer
> to get a quick estimate of the timing lag and v
Thanks John. I just placed an order.
All the best
Mark S
VE7AFZ
Sent from my iPhone
> On Dec 7, 2016, at 11:45 AM, John Ackermann N8UR wrote:
>
> I'm happy to report that TAPR is now accepting orders for the TICC
> timestamping / time interval counter. We've placed an order with the
> con
voltage drop on those circuits was negligible.
(I also had the electrical service upgraded which involved larger supply
conductors to the house which in turn would also have had less voltage drop.)
Good luck.
Mark Spencer
> On Jan 4, 2017, at 5:41 AM, Dr. David Kirkby (Kirkby Microw
I never had any
exposure to those connections.
Best regards
Mark Spencer
>
> How can they get a delay that long? Satellite link?
>
> Fiber is 5 microseconds per km. So 1000 km is 5 ms.
>
> --
> These are my o
"emergency" systems ?
Are there "leap second" test sets that non time nuts could use to generate leap
second events during pre commissioning tests ? (I'm envisioning some form of
NTP server that could generate leap second events on command ?)
Best regards
Mark Spencer
Sent f
em to be accepted at face value by the individuals I've
been dealing with. Data collected from UPS systems doesn't seem to be as well
accepted.
Mark Spencer
> On Jan 1, 2017, at 4:14 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
> wrote:
>
>> On 1 Jan 2017 11:10, &q
enum rated RG58. The
bulk of my cable run is indoors where the temperature is fairly stable.
Regards
Mark Spencer
> On Nov 21, 2016, at 12:59 PM, Scott Stobbe wrote:
>
> When I first took a look at some of the coax datasheets I couldn't find
> anything. I was able to find
On a somewhat related note
Several years ago I pondering getting a Cs standard. After considering the
performance of my references and my stack of time interval counters I concluded
that in practice I could more or less get the level of measurement accuracy I
wanted by comparing the "devi
believe my unit
features any humidity control.
Hope this is of some interest.
Mark Spencer
> On Oct 26, 2016, at 10:58 AM, John Ackermann N8UR wrote:
>
>> On 10/26/2016 1:00 PM, Richard (Rick) Karlquist wrote:
>>> On 10/26/2016 8:59 AM, John Ackermann N8UR wrote:
>>>
Hi in the (probably unlikely) event another tester would help I have a 59309a
and a spare prologix gpib / Ethernet adaptor.
I may try this code out at some point in any event.
Best regards
Mark S
Sent from my iPhone
> On Oct 7, 2016, at 5:15 PM, Tom Van Baak wrote:
>
> Hi Bob,
>
> Yes,
In practice I'm not convinced the timing requirements for the JT modes in
question are even more than a single order of magnitude more severe than the
when I have been timing 15 second sequences on my wrist watch during manual non
computer aided weak signal operations. To recap if some one has
Yes I'd be curious in knowing more about this as well. I've often observed
time differences from other stations of several tenths of a second when running
the JT modes on HF. Although I am beginner at EME I have made a couple of EME
(earth moon earth) JT65 contacts on VHF without taking any sp
Hi Lars. I own a G3RUH (Miller) GPSDO.
>From what I can recall While testing mine with my collection of
>HP5370B's and my assortment of references the performance of mine while locked
>was generally comparable to the one in the link you provided. I never tested
>it "un locked."
I c
In my experience the commonly seen UPS's that support external batteries expect
you to use the batteries supplied (or at least specified) by the manufacturer.
That being said I have come across UPS systems that are designed to work with
generic user supplied 12 volt batteries but in my expe
ing them, you could still find old electrical forklifts with
> Ni-Fe battery made by Edison Batteries in the sixties in the past century the
> batteries are still fine. Tudor -- a led-acid battery producer -- purchased
> Edison Batteries and closed down the formidable competitor
>
> 73
They do exist. I've seen them in service at Telecom sites outside of the U.S.
and Canada. I believe there was a thread re this a few years ago ?
Sent from my iPhone
> On Sep 15, 2016, at 3:13 PM, Jeremy Nichols wrote:
>
> Since I have a 12V 100 A-H gelled electrolyte battery as a
> short-t
Hi I've run my HP105B (with the old style oscillator) from AC power via a
consumer grade UPS, 24 Vdc from a lead acid battery bank and briefly from the
internal battery pack with out any notable changes in performance (that being
said I can't measure phase noise so this observation may or may no
ery system as well. Using my HP5370's I've never been
able to detect a difference in performance of my OCXO's running on battery
power vs AC line power (or DC supplied from an HP linear supply in the case of
the BVA.)
All the best
Mark Spencer
Sent from my iPhone
> On Jul
To echo the point that Jim Lux made in another post...
I'm not sure how those of us who live an appreciable distance from the
transmitters can expect to get mili hertz accuracy in light of the HF Doppler
shift over long distance paths with restorting to tactics such as
simultaneously monitorin
That is more or less the same method I use for my amateur radio activities.
Home Depot in Canada sells similar 3M products which is helpful during quick
weekend projects.
Professionally I've seen other methods used but on my own time I like the
"splicing tape" covered with super "33 tape" app
Hi Oleg, I'd be interested in seeing more information about your phase noise
measurement setup.
All the best
Mark Spencer
VE7AFZ
Sent from my iPhone
> On Mar 27, 2016, at 1:25 PM, Oleg Skydan wrote:
>
> Hi list,
>
> I am in a process of making a low noise frequency syn
For those of us in Western Canada, I've purchased circular connectors at MRO
electronics.
Best regards
Mark Spencer
Sent from my iPhone
> On Mar 17, 2016, at 9:29 PM, Clay Autery wrote:
>
> Also Allied Electronics... If I knew it was CPCs y'all were talking
> about...
All the best
Mark Spencer
Sent from my iPhone
> On Mar 12, 2016, at 3:11 PM, Charles Steinmetz wrote:
>
> jerry wrote:
>
>> Is there any model-suffix or other identifier that would inform whether a
>> used PRS-10 has the PPS sync input feature??
>
> No
I entered the time nuts hobby I saw lots of ex Telecom timing gear
for sale on the usual auction site.
All the best
Mark Spencer
> On Feb 27, 2016, at 4:51 AM, Bob Camp wrote:
>
> Hi
>
>> On Feb 26, 2016, at 8:01 PM, Majdi S. Abbas wrote:
>>
>> On Fri, Feb 26
I've found with my HP5370B's they perform best over a fairly narrow range of
input signal levels.(1 to 2 volts If I recall correctly ?) Some
experiments might be in order for yours. Virtually all my testing was done
with 5 or 10 MHz sine waves so this may or may not be helpful in your cas
Hi Cash.
Here is a bit of a narrative and some comments from an amateur radio
perspective.
I got into the time nuts hobby as off shoot from amateur radio. I was using a
pc sound card to evaluate the frequency stability of some of my ham radios by
looking at the change in "beat note" when
Yes. I was not overly pleased with the performance of my 2700's. I ended up
pulling the PRS10 out of one of them and purchased the breakout connector board
from SRS and used the resulting 10 MHz and 1 PPS outputs.From time to time
I would sync the unit to one of my GPSDO's using the 1 PP
I looked up the part number of the cable I installed and the data sheet says it
does have Teflon insulation. It does look different than other Teflon cables I
have seen though. My main concern was and is the fire rating. The comments
about the phase stability are also of interest. If anyone
Actually I may be misremembering this.Am not sure if the cable I used was
Teflon on not. It did have a defined fire rating though, and I was concerned
about it's phase stability vis a vis temperatures.
Sent from my iPhone
> On Dec 7, 2015, at 1:58 PM, Mark Spencer wrote:
>
e the interconnection issues if you can live with the impedance miss
match.
Sent from my iPhone
> On Dec 7, 2015, at 11:23 AM, Bruce Griffiths
> wrote:
>
>> On Sunday, December 06, 2015 10:02:43 AM Mark Spencer wrote:
>> I've seen data re delay vs temperature for high end 50
Try not to laugh to hard but the compression connectors and crimper for RG6
style cables I picked up at Home Depot in Canada a few years ago seems to work
quite well.
I have used high quality pro tools at work over the years (mostly though I
watch other people use them on occasion these days
Sat, 5 Dec 2015 17:06:03 -0800
> Mark Spencer wrote:
>
>> Over the years I've used a number of CATV style 75 ohm patch cords
>> with F connectors, F female to female couplers and F to other connector
>> adaptors to distribute gps signals from my GPS splitter to variou
Over the years I've used a number of CATV style 75 ohm patch cords with F
connectors, F female to female couplers and F to other connector adaptors to
distribute gps signals from my GPS splitter to various receivers. I've never
been able to notice any difference in reported signal strength vs
I don't recall ever having this issue with mine. As a general rule though I
seemed to have more success using 5 and 10 MHz reference signals vs 1 pps
reference signals with my HP5370's and HP5335's when making Adev measurements
of 5 and 10 MHz OCXO's.
Sent from my iPhone
> On Nov 23, 2015, at
Sorry for a somewhat Non time nuts posting but this topic seems to have drawn a
lot of interest.
I found the Microsoft article fascinating. Thanks for sharing.
Re DC power. I've seen some computing equipment that ran from -48 volts DC
but to expand on the comments from PHK about DC power
Yes this is a complex topic. At one point in my career when I was responsible
for the up time of several data centres for a high tech firm I had an
Electrical Engineer on my team to (amongst other roles) work thru the various
issues pertaining to UPS systems. I recall there were significant
I'm fortunate that several of pieces of my time nuts gear (including two of my
ocxo's) feature backup 24 volt dc power inputs. They were the only things in
my house that stayed running during a recent 2 day power outage while I was
away.
I have two large 12 volt gel cells in series that I re
I've also seen inverter systems that are designed for stand by power use in
service at commercial sites in third world countries. Within reason they
basically let you run what ever reasonable arrangement of rechargeable lead
acid based batteries you want that will supply the required voltage an
gards
Mark S
Sent from my iPhone
> On Oct 10, 2015, at 8:26 AM, Mark Spencer wrote:
>
> A quick comment about "pure sine" devices.
>
> At times I operate a portable VHF and up radio system from rf quiet out of
> the way places. I run almost all the equipment from le
A quick comment about "pure sine" devices.
At times I operate a portable VHF and up radio system from rf quiet out of the
way places. I run almost all the equipment from lead acid storage batteries.
I have small 30 dollar inverter I use to occasionally power some equipment
that needs 120 v
Hi over the last 10 years or so I've purchased several consumer / small office
grade UPS's from sources such as Staples and Costco. I've never noted any RFI
from them but I live in a (rf) noisy urban neighbourhood so any noise they put
out is probably hard to notice.
Other than occasionally t
Hi I have one of the masts, it's just a piece of tubing. According to the
instructions that came with my antenna the mast has an outer diameter of 42mm,
I would expect a metal supply store could supply a suitable piece of pipe or
tubing ?
Hex screws in the base of the antenna clamp the antenn
rent com ports.
>
>>>> -Original Message-
>>>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark
>>>> Spencer
>>>> Sent: Tuesday, September 08, 2015 4:41 PM
>>>> To: Discussion of precise time and frequency measur
; On Sep 1, 2015, at 9:05 PM, Bob Benward wrote:
>
> Can you communicate over RS232? Are you using the Z38xx software? What
> does it say?
>
> Bob
>
>>>> -Original Message-
>>>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behal
ed in my garage (:
Mark Spencer
VE7AFZ
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and follow the instructions there.
nger tau's ?
All the best Mark Spencer
> On Aug 6, 2015, at 8:37 PM, tim...@timeok.it wrote:
>
>
> here the ADEV of the two oscillator. I have added the Super performance of an
> HP105B (old oscillator) bought in an Ham fest.
>
> Luciano
>
>
>
>>
e the crystal to oscillate. It looks to
be 1950's to 1970's vintage.
Any info would be appreciated. Yes I realize I can probably figure things out
with an ohm meter (: but thought I would ask first.
All the best
Mark Spencer
Sent from my iPad
_
Hi Brek. In my experience the perceived frequency difference from Doppler
shift is of little or no relevance for amateur HF communications. For
amateurs involved in activities such as the frequency measurement test I
believe it could be at times relevant at HF. There might be a mode where
The GPS splitter is spoken for.
Thanks
Mark Spencer
Sent from my iPhone
> On Jun 25, 2015, at 2:07 PM, Mark Spencer wrote:
>
> Sorry for the thread hi jack. I also have a lightly used Symmetricom 58535A
> dual port (one antenna, two receivers) gps splitter I would be happy to
$750 new.
>
> Or am I missing something here?
>
> R
>
>> On 26 June 2015 at 03:30, Mark Spencer wrote:
>>
>> Hi I'm wondering if there is any interest in my Jackson labs fury (desktop
>> version) with the docxo option. I purchased it new from
ricey.
Thanks
Mark Spencer
m...@alignedsolutions.com
Sent from my iPhone
> On Jun 25, 2015, at 6:18 AM, Cash Olsen wrote:
>
> I initially tried using Dishtv splitters with qualified success. On closer
> examination the bandpass between dish 1 and dish2 is different and neither
>
I would include the power supply it
shipped with from Jackson labs.
I'm also looking at selling it via some other channels as well so it may be
gone soon.
Please contact me off list if you are interested in pursuing this. I'm happy
to send photos and provide more details to an intere
thing that has been kludged together ?
Do you need a Peng or other professional to sign off on the solution ?
(In my experience PTP may on occasion be found in industrial settings where a
Peng may be required to sign off on the solution.)
Mark Spencer
On 2015-05-12, at 4:00 PM, "Tucek,
, but need to factor in the cost
of my time or that of someone else, plus there is a strong desire to either
drop in a COTS "black box" or use a laptop.
Thanks for the comments.
Sent from my iPad
On 2015-05-12, at 3:54 PM, Pete Stephenson wrote:
> On Tue, May 12, 2015 at 7:11 PM,
so far so I'm moving
> forward with a board layout and eventual sale to the list members if there
> is any interest (I'm not asking for interest yet).
>
> -Bob
>
> On Tue, May 12, 2015 at 11:11 AM, Mark Spencer
> wrote:
>
>> Hi sorry for a possibly OT pos
C's if there is no wireless coverage.
This is for a one off project so piecing together various parts is an option
but a single box COTS solution would be nice. I've found a few candidates via
web searches but would welcome any feed back.
Thanks
In practice it seems to be hard to fight interference issues at lower
frequencies. A local 50,000 watt AM (medium wave) broadcaster, put up a FM
(VHF) transmitter several years ago. One of the reasons they gave for going
to FM were the interference issues on the AM band. I noticed the newe
stion as a possible way to breathe a bitmore life into an older piece of
equipment.
Regards
Mark Spencer
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and follow the instructions there.
If anyone has a burning desire for a HP5328 with a volt meter module (and a
GPIB board) please contact me off list.
Regards
Mark Spencer
Sent from my iPad
On 2015-04-23, at 3:18 PM, Bob Albert via time-nuts wrote:
> From your comments, it seems that finding a voltmeter board to add to
I've often wondered why more systems don't use TAI or other similar time scales
as their time source. If needed the time displayed to end users or third
parties could be converted to UTC just prior to presentation or transmittal.
For example a financial system that needs to time stamp individu
radio gear are separate but still in the same house.
Mark Spencer
On 2014-11-27, at 1:47 PM, Bob Camp wrote:
> Hi
>
> You can also discover interesting things about the transformer it’s self in
> some circuits. They do what they do, but they also bring along a new set of
> is
I've long had a nagging suspicion that OCXO's that are not adjusted will in
practice have lower ADEV than ones that are tweaked regularly. Several days
ago I noticed that one of my 10811's was performing quite well (I believe this
is the first time any of 10811's have delivered adev / madev nu
nuts gear.
Disclaimer I'm not an electrical engineer or lightning protection expert so
please don't rely on this comment.
Mark Spencer
On 2014-11-26, at 2:54 PM, Hal Murray wrote:
>
> albertson.ch...@gmail.com said:
>> The ground rod needs to be bonded to the rest of the
impedance antenna grounds are connected to an electrical
service ground.
My usual disclaimer of I'm not an expert in this field, the preceding is only
my opinion, and don't rely on this applies.
Mark Spencer
On 2014-11-26, at 2:56 PM, Martin A Flynn wrote:
> On 11/26/2014 5:14
One of my Z3805's (with the double oven 10811 ocxo iirc) also performs
similarly at times to the 58503A mentioned by Said. From an adev perspective
it's close to my BVA at some tau's (around a hundred seconds or so iirc.) At
times though the output seems to "jump" in frequency. My other Z38
g term drift.) From time to time I also cross check my "best" GPSDO
against another GPSDO (:
Regards Mark Spencer
Sent from my iPad
On 2014-11-11, at 4:26 PM, Charles Steinmetz wrote:
> Mark wrote:
>
>> I find the concept of occasionally adjusting a good OCXO which in t
casionally adjusting a good OCXO which in turn is used
as a reference works well for me.I have some that haven't needed adjustment
for over 2 years (they are still well within one part per billion of being on
frequency.)
That being said the MV89's were at least fairly in expensive
To add a bit to this discussion I recently switched from using from using
HP5370B's for long term data collection to HP5335's. For plotting the long
term drift of two of my more stable OCXO's versus a GPSDO the 5335's combined
with Timelab work fine for my limited needs. Just for grins I co
tween frequency shifts in some
ocxo's vs temperature changes. I should also start taking humidity
measurements as well at some point.
Any pointers re suitable instruments to accomplish this that can be sourced
via the usual surplus sources would be welcome.
Thanks in advance
Mark Spencer
Se
Hi Bob, All of my actively used HP5370B's exhibit behavior similar to yours.
I routinely use a BVA oscillator as the clock for most of my HP5370B's. I've
also done some testing comparing the reported adev of other signals using
various references and swapping between the internal oscillato
.
If you would like more specfic info feel free to contact me off list and I can
try to help.
Regards
Mark Spencer
--
> On Oct 3, 2013, at 11:24 PM, Paul wrote:
>
> I'm looking for a new, ready to go, inexpensive" desktop GPSDO. So
> far I
013-08-29, at 1:08 PM, Mark Spencer wrote:
> During my efforts to find a standard that could serve as reference to help
> characterize my FTS1050, I went thru a succession of 10811's, several stand
> alone datum 1000's from the usual auction site, an HP105B, a wenzel from the
During my efforts to find a standard that could serve as reference to help
characterize my FTS1050, I went thru a succession of 10811's, several stand
alone datum 1000's from the usual auction site, an HP105B, a wenzel from the
usual auction site etc and none of them came even close to the adev
timum input levels for peak
performance.
Regards Mark Spencer
Sent from my iPad
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At least one my Z3805's is also showing a date from 1993.
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Hi, the recent discussion about 10811's with double oven's caused me to take
another look at some of the data I've collected from one of my two GPSDO's that
uses a 10811 double oven OCXO.
I realize there is much more to the performance of a GPSDO than the OCXO but I
can't say I'm unhappy with
Eric:
http://tf.nist.gov/general/pdf/1133.pdf
discusses the noise levels of various batteries.
Regards
Mark S
Message: 6
Date: Wed, 10 Jul 2013 11:11:00 -0700
From: Eric Williams
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lead acid battery no
g the OCXO directly
connected to the battery bank while the batteries are float charged.
Best regards
Mark Spencer
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cated that gel cell
batteries are not known for low noise levels (:
Best regards Mark Spencer
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Hi, to echo the comments John and Magnus made, I've encountered similar issues
in the past when using my HP5370B's to compare my FTS 1050 to other standards.
The fix involved using double shielded "RG 400 style" cables in my lab (I
realize the RG 400 standard is not really a standard any more..
I be inclined to go down this road before I started blowing extra
air over them with fans.
In general I agree with the comments about the serviceability of the older HP
gear. I'm hopefull that I can keep at least two of my four HP5370B's working
for many years to co
more detail. (Sorry I am on
the road right now.)
Regards
Mark Spencer
--- On Fri, 5/17/13, time-nuts-requ...@febo.com
wrote:
From: time-nuts-requ...@febo.com
Subject: time-nuts Digest, Vol 106, Issue 80
To: time-nuts@febo.com
Received: Friday, May 17, 2013, 9:00 AM
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