Re: [time-nuts] Connectors

[paul swed]

Brent
You must be ex-Navy. We did the same thing with a final coat
of liquid rubber. 3M scotch coat. On the ships I could open a connector
that had been to sea for years and the connectors were clean as they were
when installed. I still use this approach. Very solid and as I mentioned
earlier in the thread I use the F connectors for lots of things.


On Fri, Apr 12, 2013 at 12:01 PM, brent evers  wrote:

> BTW - 3M Scotch rubber tape is regularly used in the offshore industry to
> make waterproof connections to 6000m/10,000psi.  I use it on any/all
> outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors
> as well.  I cover the rubber tape with a layer of electrical tape (Super
> 88), and then a layer of scotchguard over that.
>
> Scotch rubber tape comes in both a linered (23), and liner-less (130C)
> version.  I far prefer the liner-less 130c.
>
> To make sure this is time related, my two Thunderbolt antenna connectors
> are also sealed this way.
>
> Brent
>
>
>
> On Fri, Apr 12, 2013 at 11:16 AM, Rob Kimberley <
> robkimber...@btinternet.com
> > wrote:
>
> > It's a very useful material, also called "Self Amalgamating Tape".
> >
> > Been using it for years for all sorts of outside cable work.
> >
> > Rob
> >
> > -Original Message-
> > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> > Behalf Of Azelio Boriani
> > Sent: 12 April 2013 14:00
> > To: Discussion of precise time and frequency measurement
> > Subject: Re: [time-nuts] Connectors
> >
> > Sorry, not neoprene but self-sealing polyisobutyl tape, very effective
> for
> > the outdoor antenna work**. I have recently opened a sealed connection,
> > after 10 years, and the protected connector appears as new.
> >
> > On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani
> > wrote:
> >
> > > I use neoprene tape to make really water tight connections for all
> > > type of connectors.
> > >
> > >
> > > On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:
> > >
> > >> Hi
> > >>
> > >> The fancy F connectors are indeed waterproof if:
> > >>
> > >> 1) You have the right cable
> > >> 2) The cable and connector match up
> > >> 3) The tool and the connector match up
> > >>
> > >> The auction sites are a great place to get samples of connectors and
> > >> tools that apparently work with no known cable .
> > >>
> > >> If you are not careful about the trim on the dielectric / positioning
> > >> , they can have issues above 1 or 2 GHz. Even a lot of care they
> > >> don't really do the job above 5 GHz. Exactly where they drop out
> > >> depends (of course) on your return loss expectations.
> > >>
> > >> Bob
> > >>
> > >> On Apr 11, 2013, at 4:21 PM, Gordon Batey 
> wrote:
> > >>
> > >> > Greetings,
> > >> >
> > >> > I have used the longitudinal compression F connectors for some time
> > >> > now
> > >> with
> > >> > several GPS units and RG-6 cable.  They certainly appear to be
> > >> waterproof
> > >> > and quite sturdy.  Not inexpensive but very serviceable.  I found a
> > >> > kit
> > >> with
> > >> > the installation tool and connectors and separate connectors at
> > >> > LOWES
> > >> that
> > >> > does a nice job.  I also found one for BNC that use the same
> > >> > principle
> > >> but
> > >> > have not used it yet.  Gordon WA4FJC
> > >> >
> > >> > ___
> > >> > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
> > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > >> > and follow the instructions there.
> > >>
> > >> ___
> > >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
> > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > >> and follow the instructions there.
> > >>
> > >
> > >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> >
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> >
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Brooks Shera ASM release

[Alan Melia]

Bert is there any way we can add our names to some expression of thanks to 
his widow Karen and her helpers for their work and maybe leave a remembrance 
of his worldwide friends for his family?


Thanks for your efforts
Best wishes
Alan Melia  (G3NYK)
UK


- Original Message - 
From: 

To: 
Sent: Friday, April 12, 2013 8:52 PM
Subject: [time-nuts] Brooks Shera ASM release



The time-nuts server takes out all spaces so allow me to  resend the
acknowledgementsBert Kehren
  
  


At this time I like to thank Brooks for all  the work he did, his wife
Karen Stoll for deciding to release HEX and ASM and  Bob Leichner who
implemented the software commands. Brooks did not have the  chance to put 
final
touches in and complete his work, so Richard McCorkle  stepped in and made 
the

final changes. For almost a decade Brooks and Richard  collaborated on the
GPSDO, which benefits all of us. Also major recognition has  to go to 
Juerg
Koegel an other time nut that put our other projects on hold to  check 
every
iteration. Attached is part of a test that clearly shows the  performance 
of

the Alpha filter. Limited by attachment size contact me off list  for more
data.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there. 


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Azelio Boriani]

I use neoprene tape to make really water tight connections for all type of
connectors.

On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:

> Hi
>
> The fancy F connectors are indeed waterproof if:
>
> 1) You have the right cable
> 2) The cable and connector match up
> 3) The tool and the connector match up
>
> The auction sites are a great place to get samples of connectors and tools
> that apparently work with no known cable …
>
> If you are not careful about the trim on the dielectric / positioning ,
> they can have issues above 1 or 2 GHz. Even a lot of care they don't really
> do the job above 5 GHz. Exactly where they drop out depends (of course) on
> your return loss expectations.
>
> Bob
>
> On Apr 11, 2013, at 4:21 PM, Gordon Batey  wrote:
>
> > Greetings,
> >
> > I have used the longitudinal compression F connectors for some time now
> with
> > several GPS units and RG-6 cable.  They certainly appear to be waterproof
> > and quite sturdy.  Not inexpensive but very serviceable.  I found a kit
> with
> > the installation tool and connectors and separate connectors at LOWES
> that
> > does a nice job.  I also found one for BNC that use the same principle
> but
> > have not used it yet.  Gordon WA4FJC
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[paul swed]

Actually though I spelled it wrong I did have the right product.
Regards
Paul
WB8TSL


On Fri, Apr 12, 2013 at 3:31 PM, paul swed  wrote:

> Ohhh man. Yes wrong product ScotchKote.
> Regards
> Paul
>
>
> On Fri, Apr 12, 2013 at 2:48 PM, Mike S  wrote:
>
>> On 4/12/2013 1:58 PM, Rick Karlquist wrote:
>>
>>> What are you referring to as "scotchguard"?  I thought that was
>>> a discontinued waterproofing spray for fabric.  You must be talking
>>> about something else.
>>>
>>
>> He may have meant Scotchkote, as in Scotchkote Electrical Coating FD.
>>
>> BTW, "Scotchgard" is used for multiple products, and the fabric spray
>> isn't discontinued, just reformulated.
>>
>>
>> __**_
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/**
>> mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Brooks Shera ASM release

[Arnold Tibus]

Gentlemen,
this is a very good note,
many thanks for this very interesting information and the work behind!
I will try to implement the new code and a new processor without
mistakes from my side.

Regards,

Arnold, DK2WT

Am 12.04.2013 20:28, schrieb ewkeh...@aol.com:
>  
> Attached is Brooks Shera's final source code and hex file. As a  reminder
> in all of his released code Brooks requested that any use of his  code be
> limited to non-commercial applications.
>
> Users of this code  implicitly agree to the following conditions:
>
> Copyright © 1997-2008, Brooks Shera.  All rights reserved.   This program
> may be used only for non-commercial purposes, and carries no  warranty
> of any kind, including any implied warranty of fitness for any  particular
> purpose.
> Redistribution and use in source and binary forms,  with or without
> modification, are permitted for non-commercial purposes  only
> provided that the following conditions are met:
>
> 1.  Redistributions of source code must retain the above copyright
> notice, this list of conditions and the following disclaimer.
>
> 2.  Redistributions in binary form must reproduce the above copyright
> notice, this list of conditions and the following disclaimer in  the
> documentation and/or other materials provided with the  distribution.
>
> This software is provided by the author and contributors  "as is" and
> any express or implied warranties, including, but not limited to,  the
> implied warranties of merchantability and fitness for a  particular
> purpose are disclaimed. In no event shall the author or  contributors
> be liable for any direct, indirect, incidental, special,  exemplary,
> or consequential damages (including, but not limited to,  procurement
> of substitute goods or services; loss of use, data, or profits;  or
> business interruption) however caused and on any theory of  liability,
> whether in contract, strict liability, or tort (including  negligence
> or otherwise) arising in any way out of the use of this  software,
> even if advised of the possibility of such  damage. 
> At this time I like to thank Brooks for all the work he  did, his wife 
> Karen Stoll for deciding to release HEX and ASM and Bob Leichner  who 
> implemented the software commands. Brooks did not have the chance to put  
> final 
> touches in and complete his work, so Richard McCorkle stepped in and made  
> the 
> final changes. For almost a decade Brooks and Richard collaborated on the  
> GPSDO, which benefits all of us. Also major recognition has to go to Juerg  
> Koegel an other time nut that put our other projects on hold to check every  
> iteration. Attached is part of a test that clearly shows the performance of 
> the 
>  Alpha filter and AutoN. Limited by attachment size contact me off list for 
>  more data. 
> The code supports 16C73, 16F73, 16F873A and  16F876A. 
> Juerg using the original A&A board with original  components but a 16F876A 
> sees 5 E-12 after 12 hours. The data and Hex file is  for 16F876A. Once 
> other Hex files have been tested they will be released. Any  one can also do 
> their own compellation using the attached ASM file.  
>
>
>
>
>

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

[time-nuts] Brooks Shera ASM release

[EWKehren]

The time-nuts server takes out all spaces so allow me to  resend the 
acknowledgementsBert Kehren
   
   
 
 
At this time I like to thank Brooks for all  the work he did, his wife 
Karen Stoll for deciding to release HEX and ASM and  Bob Leichner who 
implemented the software commands. Brooks did not have the  chance to put final 
touches in and complete his work, so Richard McCorkle  stepped in and made the 
final changes. For almost a decade Brooks and Richard  collaborated on the 
GPSDO, which benefits all of us. Also major recognition has  to go to Juerg 
Koegel an other time nut that put our other projects on hold to  check every 
iteration. Attached is part of a test that clearly shows the  performance of 
the Alpha filter. Limited by attachment size contact me off list  for more 
data.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[paul swed]

OK this is crazy I answered out of sequence not realizing my email had
never been sent.
Describing Navy and ScotchKote...
Regards
Paul
WB8TSL


On Fri, Apr 12, 2013 at 3:36 PM, paul swed  wrote:

> Brent
> You must be ex-Navy. We did the same thing with a final coat
> of liquid rubber. 3M scotch coat. On the ships I could open a connector
> that had been to sea for years and the connectors were clean as they were
> when installed. I still use this approach. Very solid and as I mentioned
> earlier in the thread I use the F connectors for lots of things.
>
>
> On Fri, Apr 12, 2013 at 12:01 PM, brent evers wrote:
>
>> BTW - 3M Scotch rubber tape is regularly used in the offshore industry to
>> make waterproof connections to 6000m/10,000psi.  I use it on any/all
>> outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors
>> as well.  I cover the rubber tape with a layer of electrical tape (Super
>> 88), and then a layer of scotchguard over that.
>>
>> Scotch rubber tape comes in both a linered (23), and liner-less (130C)
>> version.  I far prefer the liner-less 130c.
>>
>> To make sure this is time related, my two Thunderbolt antenna connectors
>> are also sealed this way.
>>
>> Brent
>>
>>
>>
>> On Fri, Apr 12, 2013 at 11:16 AM, Rob Kimberley <
>> robkimber...@btinternet.com
>> > wrote:
>>
>> > It's a very useful material, also called "Self Amalgamating Tape".
>> >
>> > Been using it for years for all sorts of outside cable work.
>> >
>> > Rob
>> >
>> > -Original Message-
>> > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
>> > Behalf Of Azelio Boriani
>> > Sent: 12 April 2013 14:00
>> > To: Discussion of precise time and frequency measurement
>> > Subject: Re: [time-nuts] Connectors
>> >
>> > Sorry, not neoprene but self-sealing polyisobutyl tape, very effective
>> for
>> > the outdoor antenna work**. I have recently opened a sealed connection,
>> > after 10 years, and the protected connector appears as new.
>> >
>> > On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani
>> > wrote:
>> >
>> > > I use neoprene tape to make really water tight connections for all
>> > > type of connectors.
>> > >
>> > >
>> > > On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:
>> > >
>> > >> Hi
>> > >>
>> > >> The fancy F connectors are indeed waterproof if:
>> > >>
>> > >> 1) You have the right cable
>> > >> 2) The cable and connector match up
>> > >> 3) The tool and the connector match up
>> > >>
>> > >> The auction sites are a great place to get samples of connectors and
>> > >> tools that apparently work with no known cable .
>> > >>
>> > >> If you are not careful about the trim on the dielectric / positioning
>> > >> , they can have issues above 1 or 2 GHz. Even a lot of care they
>> > >> don't really do the job above 5 GHz. Exactly where they drop out
>> > >> depends (of course) on your return loss expectations.
>> > >>
>> > >> Bob
>> > >>
>> > >> On Apr 11, 2013, at 4:21 PM, Gordon Batey 
>> wrote:
>> > >>
>> > >> > Greetings,
>> > >> >
>> > >> > I have used the longitudinal compression F connectors for some time
>> > >> > now
>> > >> with
>> > >> > several GPS units and RG-6 cable.  They certainly appear to be
>> > >> waterproof
>> > >> > and quite sturdy.  Not inexpensive but very serviceable.  I found a
>> > >> > kit
>> > >> with
>> > >> > the installation tool and connectors and separate connectors at
>> > >> > LOWES
>> > >> that
>> > >> > does a nice job.  I also found one for BNC that use the same
>> > >> > principle
>> > >> but
>> > >> > have not used it yet.  Gordon WA4FJC
>> > >> >
>> > >> > ___
>> > >> > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
>> > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > >> > and follow the instructions there.
>> > >>
>> > >> ___
>> > >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
>> > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > >> and follow the instructions there.
>> > >>
>> > >
>> > >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com
>> > To unsubscribe, go to
>> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>> >
>> >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com
>> > To unsubscribe, go to
>> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>> >
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions

Re: [time-nuts] Connectors

[paul swed]

Ohhh man. Yes wrong product ScotchKote.
Regards
Paul


On Fri, Apr 12, 2013 at 2:48 PM, Mike S  wrote:

> On 4/12/2013 1:58 PM, Rick Karlquist wrote:
>
>> What are you referring to as "scotchguard"?  I thought that was
>> a discontinued waterproofing spray for fabric.  You must be talking
>> about something else.
>>
>
> He may have meant Scotchkote, as in Scotchkote Electrical Coating FD.
>
> BTW, "Scotchgard" is used for multiple products, and the fabric spray
> isn't discontinued, just reformulated.
>
>
> __**_
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/**
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Brooks Shera ASM release

[paul swed]

Bert
Thank you for working to share Brooks code with the time-nuts.
Regards
Paul.


On Fri, Apr 12, 2013 at 2:28 PM,  wrote:

>
> Attached is Brooks Shera’s final source code and hex file. As a  reminder
> in all of his released code Brooks requested that any use of his  code be
> limited to non-commercial applications.
>
> Users of this code  implicitly agree to the following conditions:
>
> Copyright © 1997-2008, Brooks Shera.  All rights reserved.   This program
> may be used only for non-commercial purposes, and carries no  warranty
> of any kind, including any implied warranty of fitness for any  particular
> purpose.
> Redistribution and use in source and binary forms,  with or without
> modification, are permitted for non-commercial purposes  only
> provided that the following conditions are met:
>
> 1.  Redistributions of source code must retain the above copyright
> notice, this list of conditions and the following disclaimer.
>
> 2.  Redistributions in binary form must reproduce the above copyright
> notice, this list of conditions and the following disclaimer in  the
> documentation and/or other materials provided with the  distribution.
>
> This software is provided by the author and contributors  "as is" and
> any express or implied warranties, including, but not limited to,  the
> implied warranties of merchantability and fitness for a  particular
> purpose are disclaimed. In no event shall the author or  contributors
> be liable for any direct, indirect, incidental, special,  exemplary,
> or consequential damages (including, but not limited to,  procurement
> of substitute goods or services; loss of use, data, or profits;  or
> business interruption) however caused and on any theory of  liability,
> whether in contract, strict liability, or tort (including  negligence
> or otherwise) arising in any way out of the use of this  software,
> even if advised of the possibility of such  damage.
> At this time I like to thank Brooks for all the work he  did, his wife
> Karen Stoll for deciding to release HEX and ASM and Bob Leichner  who
> implemented the software commands. Brooks did not have the chance to put
>  final
> touches in and complete his work, so Richard McCorkle stepped in and made
>  the
> final changes. For almost a decade Brooks and Richard collaborated on the
> GPSDO, which benefits all of us. Also major recognition has to go to Juerg
> Koegel an other time nut that put our other projects on hold to check every
> iteration. Attached is part of a test that clearly shows the performance
> of the
>  Alpha filter and AutoN. Limited by attachment size contact me off list for
>  more data.
> The code supports 16C73, 16F73, 16F873A and  16F876A.
> Juerg using the original A&A board with original  components but a 16F876A
> sees 5 E-12 after 12 hours. The data and Hex file is  for 16F876A. Once
> other Hex files have been tested they will be released. Any  one can also
> do
> their own compellation using the attached ASM file.
>
>
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

[time-nuts] UPDATE: DATUM 9390-52054 Grief again...

[Burt I. Weiner]

Sorry for the delay in posting this update.  Things have been hectic, 
and then there was NAB.


Here's what I've discovered:  The receiver started working after 
about 6 hours of just sitting.  However, the 9390's internal Vectron 
oscillator was quite a ways off frequency and did not want to lock 
after trying to stabilize all night.  I had to tweak the adjustment 
screw quite a ways and then, after a while, it locked.  Prior to this 
episode the oscillator had been sitting at only a few E-12.  I 
suspect that this oscillator has had an intermittent problem for a 
long time, and I should not have had to tweak it as far as it wanted 
to go.  The receiver portion has not failed in the few weeks since it 
decided to start seeing satellites again.  Maybe because I had 
tweaked the oscillator?


So, I got brave and changed the oscillator out with a smaller Vectron 
oscillator that I got from my friend Stu, K6YAZ.  This is not a 
commercial, but he sells these oscillator modules on eBay.  See: 
http://www.ebay.com/itm/10-MHz-precision-crystal-oscillator-in-sealed-oven-5-volts-voltage-adjustable-/190820631639?pt=LH_DefaultDomain_0&hash=item2c6dcbc457#ht_848wt_1143


The new oscillator requires 5 Volts rather than 12 Volts, which I 
simply grabbed from the from the power supply's 5 Volt rail.  It was 
not a lot of fun removing the original oscillator from the circuit 
board and the associated fine traces, but once I plucked it from the 
board I put short wire leads in the original circuit board holes for 
the various connections to the new oscillator.  I cut a piece of foam 
about the size of the old Vectron and carved out it's innards to 
accept the new, much smaller oscillator.  This should provide some 
thermal stability and also insulate the new oscillator from the 
circuit board.  I connected everything up, substituting the 5 Volt 
rail lead for the 12 Volt lead.  When I powered the 9390 up 
everything seemed to work and the oscillator was within 1-Hertz, 
except that the output was about 20 dB higher than with the original 
oscillator was when it was working properly.  Once the receiver 
locked up to 4 satellites and started "OSC Stabilizing", the 
oscillator suddenly jumped about 18 Hz low and shortly afterwards the 
DAC went to all zeros.  I let it sit all night figuring that it would 
eventually find itself.  Well, it didn't, it just sat at 18 Hz low 
and the DAC at all zeros, and the EFC (Electronic Frequency Control) 
voltage at 0.19 Volts.  (What a revolting development!)


Very early this AM I got up and put a simple 10:1 voltage divider 
using a series 680 Ohm and 68 Ohm resistor from the oscillator's RF 
out to ground This brought the levels pretty much back to the same as 
my good 9390.  I also substituted a pot for the EFC voltage.  I used 
a 1 K pot in series with a 300 Ohm resistor to the 5 Volt rail.  The 
resistor was on the high side, the bottom end to ground, and the 
wiper to the EFC terminal.  I was able to tune the oscillator to 
precisely 10 MHz long enough to measure the substitute EFC at +2.15 
Volts.  Leaving it hooked up this way I let the receiver do it's 
thing just to see what would happen.  It went through it's normal 
routine and finally the green lock light came on.  Although the 
oscillator wasn't being controlled by the 9390, the 9390 thought it 
was happy and the DAC went to about 28,000 - very close to ideal.  I 
tweaked the pot hither and yon to move the frequency and to see which 
way the EFC voltage went.  It went the right direction to properly 
steer the oscillator and should have worked.


Pondering the situation, I powered the 9390 down and reconnected the 
9390's EFC voltage back up to see what would happen this time.  This 
time it locked up quickly and the oscillator homed in on 10 MHz.  The 
EFC voltage is 2.15 Volts and the DAC settled in nicely at 28302 - 
very close to the recommended DAC numbers.  It's been cooking for 
about an hour now and is presently at 112E-12 and moving closer all 
the time.  When comparing the two GPS receivers I am not seeing the 
random drifts that I had seen in the past.


I suspect that the problem with the frequency jumping to -18 Hz and 
the DAC going to all zeros was the result of the new oscillator 
over-driving the following circuitry.  In hindsight, maybe I should 
have probed a bit with the scope to see if that is a correct 
assumption, but I didn't do that.


By the way, Stu sells the oscillators fully tested and with a note 
giving the EFC voltage for each unit to tune it to 10 MHz.  If this 
turns out to be as good a modification as it now appears, I'm going 
to get more of the oscillators from him.  I may replace the one in my 
other 9390 and for sure will replace internal reference oscillator in 
my IFR-1500 Service Monitor.


Burt, K6OQK



Earlier, I had written:

I notice that when it first turns on there is a message where I 
normally expect to see "System Check ok."  The message 
reads:  N200/S116/DT202KP.  I don

Re: [time-nuts] Connectors

[Mike S]

On 4/12/2013 1:58 PM, Rick Karlquist wrote:

What are you referring to as "scotchguard"?  I thought that was
a discontinued waterproofing spray for fabric.  You must be talking
about something else.


He may have meant Scotchkote, as in Scotchkote Electrical Coating FD.

BTW, "Scotchgard" is used for multiple products, and the fabric spray 
isn't discontinued, just reformulated.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Brooke Clarke]

Hi:

Water has a dielectric constant around 60 compared to plastic that just over 2.  So if water gets into the connection 
there's going to be problems.
It turns out that Silicon grease has a dielectric constant very close to plastic so filling an open RF connector with 
Silicon grease prior to mating them is a great way to water proof the joint.  See Weatherproofing  at 
http://www.prc68.com/I/OE254.shtml


Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

brent evers wrote:

BTW - 3M Scotch rubber tape is regularly used in the offshore industry to
make waterproof connections to 6000m/10,000psi.  I use it on any/all
outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors
as well.  I cover the rubber tape with a layer of electrical tape (Super
88), and then a layer of scotchguard over that.

Scotch rubber tape comes in both a linered (23), and liner-less (130C)
version.  I far prefer the liner-less 130c.

To make sure this is time related, my two Thunderbolt antenna connectors
are also sealed this way.

Brent



On Fri, Apr 12, 2013 at 11:16 AM, Rob Kimberley 
wrote:
It's a very useful material, also called "Self Amalgamating Tape".

Been using it for years for all sorts of outside cable work.

Rob

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: 12 April 2013 14:00
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Connectors

Sorry, not neoprene but self-sealing polyisobutyl tape, very effective for
the outdoor antenna work**. I have recently opened a sealed connection,
after 10 years, and the protected connector appears as new.

On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani
wrote:


I use neoprene tape to make really water tight connections for all
type of connectors.


On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:


Hi

The fancy F connectors are indeed waterproof if:

1) You have the right cable
2) The cable and connector match up
3) The tool and the connector match up

The auction sites are a great place to get samples of connectors and
tools that apparently work with no known cable .

If you are not careful about the trim on the dielectric / positioning
, they can have issues above 1 or 2 GHz. Even a lot of care they
don't really do the job above 5 GHz. Exactly where they drop out
depends (of course) on your return loss expectations.

Bob

On Apr 11, 2013, at 4:21 PM, Gordon Batey  wrote:


Greetings,

I have used the longitudinal compression F connectors for some time
now

with

several GPS units and RG-6 cable.  They certainly appear to be

waterproof

and quite sturdy.  Not inexpensive but very serviceable.  I found a
kit

with

the installation tool and connectors and separate connectors at
LOWES

that

does a nice job.  I also found one for BNC that use the same
principle

but

have not used it yet.  Gordon WA4FJC

___
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.

___
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.




___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.




___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Rick Karlquist]

brent evers wrote:
> BTW - 3M Scotch rubber tape is regularly used in the offshore industry to
> make waterproof connections to 6000m/10,000psi.  I use it on any/all
> outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors
> as well.  I cover the rubber tape with a layer of electrical tape (Super
> 88), and then a layer of scotchguard over that.

What are you referring to as "scotchguard"?  I thought that was
a discontinued waterproofing spray for fabric.  You must be talking
about something else.

Rick

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

[Volker Esper]

Am 12.04.2013 18:24, schrieb Bob Camp:

A simple way to look at filter stability is to first look at group delay at
10 MHz...

That's what I meant (d phi / d f), I just wrote it in a roundabout way...

The higher the group delay,
the more likely you are to get into the sort of trouble you thinking about.
   

Yep, my apprehension...

Unless you are playing with 1x10^-15 at tau=1 sec sort of signals, or really
crazy environments (missile launch), you can get away with some filtering on
the signal. It's likely that the harmonics you remove would have caused you
as much grief as the stability you compromise with the filter.
   
I haven't launched missiles, yet :-), but am playing with GPSDO signals, 
and planning to build a distribution amp - so I am a bit afraid about 
using filters, at least high Q ones.


Thank you, Bob, for your comment.


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Volker Esper
Sent: Friday, April 12, 2013 10:59 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Low-pass Filter for 5 and 10 MHz


...but what about the phase jitter of the filter itself? While absolute
phase shift may not (or may?) be an issue I guess that passive filters
do have a phase jitter, too, due to mechanical vibration, tempco, and
what else.

Particularly at frequencies where the filter response has sharp slopes
(resonance or corner frequency) the phase variation (d phi / d f) is
quite big. Thus small frequency changes lead to considerable phase shift
variation what in turn should lead to phase jitter added to our holy
signal - what about overall ADEV?

Wouldn't it be better to not filter the 10 MHz signal when used solely
as a frequency standard?

I understand, that a high Q filter in a PLL reduces the phase noise of
that oscillator - until the jitter of the filter becomes important. Am I
wrong?

Volker


Am 12.04.2013 02:31, schrieb Richard (Rick) Karlquist:
   

Actually, the opposite is true.  Notches have the least phase
shift at the frequency being passed, which is what matters.
It is true that the phase shift at the notch frequency is
uncontrolled, but that is not important.  The HP8662A
had an interesting PLL synthesizer where they had 10 notch
filters for the first 10 harmonics of the sampling frequencies.
This minimized phase shift within the loop bandwidth that
detracted from phase margin.  I designers of the 8662
definitely know what they were doing.

Rick Karlquist N6RK

On 4/11/2013 5:02 PM, Alan Melia wrote:
 

Maybe a silly question but isnt the phase response of the filter
important in this application ?? notches have fairly vicious phase
shifts.

Alan
G3NYK
- Original Message - From: "Luciano Paramithiotti"

To:
Sent: Thursday, April 11, 2013 5:42 PM
Subject: [time-nuts] Low-pass Filter for 5 and 10 MHz


   

A simple low pass filter to cut second and third harmonics from a 5
or 10
MHZ signal.
See the paper:
http://www.timeok.it/files/5_and_10mhz_low_pass_notch_filter.pdf

Luciano Timeok
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
 

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


   

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


 


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


   



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[brent evers]

BTW - 3M Scotch rubber tape is regularly used in the offshore industry to
make waterproof connections to 6000m/10,000psi.  I use it on any/all
outdoor signal (RF/Microwve antenna connectors, amphenol, etc) connectors
as well.  I cover the rubber tape with a layer of electrical tape (Super
88), and then a layer of scotchguard over that.

Scotch rubber tape comes in both a linered (23), and liner-less (130C)
version.  I far prefer the liner-less 130c.

To make sure this is time related, my two Thunderbolt antenna connectors
are also sealed this way.

Brent



On Fri, Apr 12, 2013 at 11:16 AM, Rob Kimberley  wrote:

> It's a very useful material, also called "Self Amalgamating Tape".
>
> Been using it for years for all sorts of outside cable work.
>
> Rob
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Azelio Boriani
> Sent: 12 April 2013 14:00
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Connectors
>
> Sorry, not neoprene but self-sealing polyisobutyl tape, very effective for
> the outdoor antenna work**. I have recently opened a sealed connection,
> after 10 years, and the protected connector appears as new.
>
> On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani
> wrote:
>
> > I use neoprene tape to make really water tight connections for all
> > type of connectors.
> >
> >
> > On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:
> >
> >> Hi
> >>
> >> The fancy F connectors are indeed waterproof if:
> >>
> >> 1) You have the right cable
> >> 2) The cable and connector match up
> >> 3) The tool and the connector match up
> >>
> >> The auction sites are a great place to get samples of connectors and
> >> tools that apparently work with no known cable .
> >>
> >> If you are not careful about the trim on the dielectric / positioning
> >> , they can have issues above 1 or 2 GHz. Even a lot of care they
> >> don't really do the job above 5 GHz. Exactly where they drop out
> >> depends (of course) on your return loss expectations.
> >>
> >> Bob
> >>
> >> On Apr 11, 2013, at 4:21 PM, Gordon Batey  wrote:
> >>
> >> > Greetings,
> >> >
> >> > I have used the longitudinal compression F connectors for some time
> >> > now
> >> with
> >> > several GPS units and RG-6 cable.  They certainly appear to be
> >> waterproof
> >> > and quite sturdy.  Not inexpensive but very serviceable.  I found a
> >> > kit
> >> with
> >> > the installation tool and connectors and separate connectors at
> >> > LOWES
> >> that
> >> > does a nice job.  I also found one for BNC that use the same
> >> > principle
> >> but
> >> > have not used it yet.  Gordon WA4FJC
> >> >
> >> > ___
> >> > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> > and follow the instructions there.
> >>
> >> ___
> >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> and follow the instructions there.
> >>
> >
> >
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

[Bob Camp]

Hi

A simple way to look at filter stability is to first look at group delay at
10 MHz (or what ever your signal frequency is). The higher the group delay,
the more likely you are to get into the sort of trouble you thinking about.
Low Q / wide band filters are your friend in this case. Band pass filtering
is going to be more of an issue than a low pass. 

Unless you are playing with 1x10^-15 at tau=1 sec sort of signals, or really
crazy environments (missile launch), you can get away with some filtering on
the signal. It's likely that the harmonics you remove would have caused you
as much grief as the stability you compromise with the filter. 

Bob

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Volker Esper
Sent: Friday, April 12, 2013 10:59 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Low-pass Filter for 5 and 10 MHz


...but what about the phase jitter of the filter itself? While absolute 
phase shift may not (or may?) be an issue I guess that passive filters 
do have a phase jitter, too, due to mechanical vibration, tempco, and 
what else.

Particularly at frequencies where the filter response has sharp slopes 
(resonance or corner frequency) the phase variation (d phi / d f) is 
quite big. Thus small frequency changes lead to considerable phase shift 
variation what in turn should lead to phase jitter added to our holy 
signal - what about overall ADEV?

Wouldn't it be better to not filter the 10 MHz signal when used solely 
as a frequency standard?

I understand, that a high Q filter in a PLL reduces the phase noise of 
that oscillator - until the jitter of the filter becomes important. Am I 
wrong?

Volker


Am 12.04.2013 02:31, schrieb Richard (Rick) Karlquist:
> Actually, the opposite is true.  Notches have the least phase
> shift at the frequency being passed, which is what matters.
> It is true that the phase shift at the notch frequency is
> uncontrolled, but that is not important.  The HP8662A
> had an interesting PLL synthesizer where they had 10 notch
> filters for the first 10 harmonics of the sampling frequencies.
> This minimized phase shift within the loop bandwidth that
> detracted from phase margin.  I designers of the 8662
> definitely know what they were doing.
>
> Rick Karlquist N6RK
>
> On 4/11/2013 5:02 PM, Alan Melia wrote:
>> Maybe a silly question but isnt the phase response of the filter
>> important in this application ?? notches have fairly vicious phase 
>> shifts.
>>
>> Alan
>> G3NYK
>> - Original Message - From: "Luciano Paramithiotti"
>> 
>> To: 
>> Sent: Thursday, April 11, 2013 5:42 PM
>> Subject: [time-nuts] Low-pass Filter for 5 and 10 MHz
>>
>>
>>> A simple low pass filter to cut second and third harmonics from a 5 
>>> or 10
>>> MHZ signal.
>>> See the paper:
>>> http://www.timeok.it/files/5_and_10mhz_low_pass_notch_filter.pdf
>>>
>>> Luciano Timeok
>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

[Richard (Rick) Karlquist]

On 4/12/2013 7:58 AM, Volker Esper wrote:


...but what about the phase jitter of the filter itself? While absolute
phase shift may not (or may?) be an issue I guess that passive filters
do have a phase jitter, too, due to mechanical vibration, tempco, and
what else.

Particularly at frequencies where the filter response has sharp slopes
(resonance or corner frequency) the phase variation (d phi / d f) is
quite big. Thus small frequency changes lead to considerable phase shift
variation what in turn should lead to phase jitter added to our holy
signal - what about overall ADEV?

Wouldn't it be better to not filter the 10 MHz signal when used solely
as a frequency standard?


Most of the time, you don't have to worry about jitter in passive
filters unless you are in a high vibration environment.  The other
common cause of jitter is permeability modulation of magnetic cores
in inductors from power line fields.  However, in an atomic clock,
the clock stability is so high that phase tempco becomes significant.
A temperature ramp becomes a phase ramp which becomes a frequency 
offset.  In the 5071A, I multiply the 10811 crystal oscillator to 80 
MHz.  This 80 MHz is used for both the microwave synthesizer chain and 
also to generate a stepped approximation to a 10 MHz sine wave.  This 
greatly reduces harmonics up to 60 MHz, which allows a much less severe

output filter to be used.  This alleviates the effects noted above.
The multiplier to 80 MHz, another possible source of phase drift,
is common moded out in this architecture.

For further details, see my FCS paper.

Rick





I understand, that a high Q filter in a PLL reduces the phase noise of
that oscillator - until the jitter of the filter becomes important. Am I
wrong?

Volker


Am 12.04.2013 02:31, schrieb Richard (Rick) Karlquist:

Actually, the opposite is true.  Notches have the least phase
shift at the frequency being passed, which is what matters.
It is true that the phase shift at the notch frequency is
uncontrolled, but that is not important.  The HP8662A
had an interesting PLL synthesizer where they had 10 notch
filters for the first 10 harmonics of the sampling frequencies.
This minimized phase shift within the loop bandwidth that
detracted from phase margin.  I designers of the 8662
definitely know what they were doing.

Rick Karlquist N6RK

On 4/11/2013 5:02 PM, Alan Melia wrote:

Maybe a silly question but isnt the phase response of the filter
important in this application ?? notches have fairly vicious phase
shifts.

Alan
G3NYK
- Original Message - From: "Luciano Paramithiotti"

To: 
Sent: Thursday, April 11, 2013 5:42 PM
Subject: [time-nuts] Low-pass Filter for 5 and 10 MHz



A simple low pass filter to cut second and third harmonics from a 5
or 10
MHZ signal.
See the paper:
http://www.timeok.it/files/5_and_10mhz_low_pass_notch_filter.pdf

Luciano Timeok
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.





___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Volker Esper]

Yes, I use those compression types, too, for example

http://www.reichelt.de/F-Anschluss/IK-FKPS-49/3/index.html?;ACTION=3;LA=446;ARTICLE=87371;GROUPID=3538;artnr=IK+FKPS+49

Of course, everything has to match, the cable, the connector, the 
pliers. Be careful with the inner conductor. It's good up to 2 GHz, I 
didn't measure it above that frequency.


Volker


Am 11.04.2013 22:21, schrieb Gordon Batey:

Greetings,

I have used the longitudinal compression F connectors for some time now with
several GPS units and RG-6 cable.  They certainly appear to be waterproof
and quite sturdy.  Not inexpensive but very serviceable.  I found a kit with
the installation tool and connectors and separate connectors at LOWES that
does a nice job.  I also found one for BNC that use the same principle but
have not used it yet.  Gordon WA4FJC

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


   



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Rob Kimberley]

It's a very useful material, also called "Self Amalgamating Tape". 

Been using it for years for all sorts of outside cable work.

Rob

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: 12 April 2013 14:00
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Connectors

Sorry, not neoprene but self-sealing polyisobutyl tape, very effective for
the outdoor antenna work**. I have recently opened a sealed connection,
after 10 years, and the protected connector appears as new.

On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani
wrote:

> I use neoprene tape to make really water tight connections for all 
> type of connectors.
>
>
> On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:
>
>> Hi
>>
>> The fancy F connectors are indeed waterproof if:
>>
>> 1) You have the right cable
>> 2) The cable and connector match up
>> 3) The tool and the connector match up
>>
>> The auction sites are a great place to get samples of connectors and 
>> tools that apparently work with no known cable .
>>
>> If you are not careful about the trim on the dielectric / positioning 
>> , they can have issues above 1 or 2 GHz. Even a lot of care they 
>> don't really do the job above 5 GHz. Exactly where they drop out 
>> depends (of course) on your return loss expectations.
>>
>> Bob
>>
>> On Apr 11, 2013, at 4:21 PM, Gordon Batey  wrote:
>>
>> > Greetings,
>> >
>> > I have used the longitudinal compression F connectors for some time 
>> > now
>> with
>> > several GPS units and RG-6 cable.  They certainly appear to be
>> waterproof
>> > and quite sturdy.  Not inexpensive but very serviceable.  I found a 
>> > kit
>> with
>> > the installation tool and connectors and separate connectors at 
>> > LOWES
>> that
>> > does a nice job.  I also found one for BNC that use the same 
>> > principle
>> but
>> > have not used it yet.  Gordon WA4FJC
>> >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>>
>> ___
>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to 
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Low-pass Filter for 5 and 10 MHz

[Volker Esper]

...but what about the phase jitter of the filter itself? While absolute 
phase shift may not (or may?) be an issue I guess that passive filters 
do have a phase jitter, too, due to mechanical vibration, tempco, and 
what else.


Particularly at frequencies where the filter response has sharp slopes 
(resonance or corner frequency) the phase variation (d phi / d f) is 
quite big. Thus small frequency changes lead to considerable phase shift 
variation what in turn should lead to phase jitter added to our holy 
signal - what about overall ADEV?


Wouldn't it be better to not filter the 10 MHz signal when used solely 
as a frequency standard?


I understand, that a high Q filter in a PLL reduces the phase noise of 
that oscillator - until the jitter of the filter becomes important. Am I 
wrong?


Volker


Am 12.04.2013 02:31, schrieb Richard (Rick) Karlquist:

Actually, the opposite is true.  Notches have the least phase
shift at the frequency being passed, which is what matters.
It is true that the phase shift at the notch frequency is
uncontrolled, but that is not important.  The HP8662A
had an interesting PLL synthesizer where they had 10 notch
filters for the first 10 harmonics of the sampling frequencies.
This minimized phase shift within the loop bandwidth that
detracted from phase margin.  I designers of the 8662
definitely know what they were doing.

Rick Karlquist N6RK

On 4/11/2013 5:02 PM, Alan Melia wrote:

Maybe a silly question but isnt the phase response of the filter
important in this application ?? notches have fairly vicious phase 
shifts.


Alan
G3NYK
- Original Message - From: "Luciano Paramithiotti"

To: 
Sent: Thursday, April 11, 2013 5:42 PM
Subject: [time-nuts] Low-pass Filter for 5 and 10 MHz


A simple low pass filter to cut second and third harmonics from a 5 
or 10

MHZ signal.
See the paper:
http://www.timeok.it/files/5_and_10mhz_low_pass_notch_filter.pdf

Luciano Timeok
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

and follow the instructions there.





___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Azelio Boriani]

Sorry, not neoprene but self-sealing polyisobutyl tape, very effective for
the outdoor antenna work**. I have recently opened a sealed connection,
after 10 years, and the protected connector appears as new.

On Fri, Apr 12, 2013 at 2:38 PM, Azelio Boriani wrote:

> I use neoprene tape to make really water tight connections for all type
> of connectors.
>
>
> On Fri, Apr 12, 2013 at 1:27 PM, Bob Camp  wrote:
>
>> Hi
>>
>> The fancy F connectors are indeed waterproof if:
>>
>> 1) You have the right cable
>> 2) The cable and connector match up
>> 3) The tool and the connector match up
>>
>> The auction sites are a great place to get samples of connectors and
>> tools that apparently work with no known cable …
>>
>> If you are not careful about the trim on the dielectric / positioning ,
>> they can have issues above 1 or 2 GHz. Even a lot of care they don't really
>> do the job above 5 GHz. Exactly where they drop out depends (of course) on
>> your return loss expectations.
>>
>> Bob
>>
>> On Apr 11, 2013, at 4:21 PM, Gordon Batey  wrote:
>>
>> > Greetings,
>> >
>> > I have used the longitudinal compression F connectors for some time now
>> with
>> > several GPS units and RG-6 cable.  They certainly appear to be
>> waterproof
>> > and quite sturdy.  Not inexpensive but very serviceable.  I found a kit
>> with
>> > the installation tool and connectors and separate connectors at LOWES
>> that
>> > does a nice job.  I also found one for BNC that use the same principle
>> but
>> > have not used it yet.  Gordon WA4FJC
>> >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com
>> > To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>>
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Connectors

[Bob Camp]

Hi

The fancy F connectors are indeed waterproof if:

1) You have the right cable
2) The cable and connector match up
3) The tool and the connector match up

The auction sites are a great place to get samples of connectors and tools that 
apparently work with no known cable …

If you are not careful about the trim on the dielectric / positioning , they 
can have issues above 1 or 2 GHz. Even a lot of care they don't really do the 
job above 5 GHz. Exactly where they drop out depends (of course) on your return 
loss expectations. 

Bob

On Apr 11, 2013, at 4:21 PM, Gordon Batey  wrote:

> Greetings,
> 
> I have used the longitudinal compression F connectors for some time now with
> several GPS units and RG-6 cable.  They certainly appear to be waterproof
> and quite sturdy.  Not inexpensive but very serviceable.  I found a kit with
> the installation tool and connectors and separate connectors at LOWES that
> does a nice job.  I also found one for BNC that use the same principle but
> have not used it yet.  Gordon WA4FJC
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

[time-nuts] Low noise regenerative 10 to 5 MHz divider

[Luciano Paramithiotti]

See also the paper describe my regenerative divider:

http://www.timeok.it/files/low_noise_regenerative_divider.pdf

Luciano Timeok
www.timeok.it
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.