Re: [time-nuts] VECTRON 371Y383 oscillator

[Collins, Graham]

Thanks Stan, it may just come to that.

Cheers, Graham


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of stan, W1LE
Sent: August-12-13 9:10 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] VECTRON 371Y383 oscillator

Make a phone call to the NH plant. Ask a product specialist for details.
May get shuffled to the PA plant.  Persisit.

Stan, W1LE Cape Cod


On 12-Aug-13 8:53 AM, Collins, Graham wrote:
> Good day all,
>
> I recently purchased a VECTRON 10Mhz oscillator like the one in the 
> this eBay listing 38133695
>
> Very typical of some of VECTRON older offerings but I have been unable to 
> find much if any information on this oscillator. I haven't yet emailed 
> VECTRON but thought I might first ask the learned members of this list if 
> anyone has or knows any details before I plug it in to see what I get.
>
> The oscillator is marked 371Y383 which a search of VECTRONS returns nothing 
> but comparing to pictures and drawings of some older VECTRON units seems to 
> indicate it might be or is very similar to their old CO-351 product.
>
>
> Cheers, Graham ve3gtc
>
> ___
> 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.
>

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Re: [time-nuts] VECTRON 371Y383 oscillator

[paul swed]

The amazing thing is that with todays all you can eat calling plans its no
big deal to chase after the information all across the country. :-)
Remember when you tended to think about the call across the country.
Regards
Paul.
WB8TSL


On Tue, Aug 13, 2013 at 7:12 AM, Collins, Graham wrote:

> Thanks Stan, it may just come to that.
>
> Cheers, Graham
>
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of stan, W1LE
> Sent: August-12-13 9:10 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] VECTRON 371Y383 oscillator
>
> Make a phone call to the NH plant. Ask a product specialist for details.
> May get shuffled to the PA plant.  Persisit.
>
> Stan, W1LE Cape Cod
>
>
> On 12-Aug-13 8:53 AM, Collins, Graham wrote:
> > Good day all,
> >
> > I recently purchased a VECTRON 10Mhz oscillator like the one in the
> > this eBay listing 38133695
> >
> > Very typical of some of VECTRON older offerings but I have been unable
> to find much if any information on this oscillator. I haven't yet emailed
> VECTRON but thought I might first ask the learned members of this list if
> anyone has or knows any details before I plug it in to see what I get.
> >
> > The oscillator is marked 371Y383 which a search of VECTRONS returns
> nothing but comparing to pictures and drawings of some older VECTRON units
> seems to indicate it might be or is very similar to their old CO-351
> product.
> >
> >
> > Cheers, Graham ve3gtc
> >
> > ___
> > 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.
> >
>
> ___
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> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
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> To unsubscribe, go to
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Re: [time-nuts] VECTRON 371Y383 oscillator

[Collins, Graham]

Indeed, I can well recall when a long distance phone call was a really big deal 
even if it was just calling several counties away let alone out of 
province/state or country.

Cheers, Graham ve3gtc



-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of paul swed
Sent: August-13-13 8:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] VECTRON 371Y383 oscillator

The amazing thing is that with todays all you can eat calling plans its no big 
deal to chase after the information all across the country. :-) Remember when 
you tended to think about the call across the country.
Regards
Paul.
WB8TSL


On Tue, Aug 13, 2013 at 7:12 AM, Collins, Graham wrote:

> Thanks Stan, it may just come to that.
>
> Cheers, Graham
>
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
> On Behalf Of stan, W1LE
> Sent: August-12-13 9:10 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] VECTRON 371Y383 oscillator
>
> Make a phone call to the NH plant. Ask a product specialist for details.
> May get shuffled to the PA plant.  Persisit.
>
> Stan, W1LE Cape Cod
>
>
> On 12-Aug-13 8:53 AM, Collins, Graham wrote:
> > Good day all,
> >
> > I recently purchased a VECTRON 10Mhz oscillator like the one in the 
> > this eBay listing 38133695
> >
> > Very typical of some of VECTRON older offerings but I have been 
> > unable
> to find much if any information on this oscillator. I haven't yet 
> emailed VECTRON but thought I might first ask the learned members of 
> this list if anyone has or knows any details before I plug it in to see what 
> I get.
> >
> > The oscillator is marked 371Y383 which a search of VECTRONS returns
> nothing but comparing to pictures and drawings of some older VECTRON 
> units seems to indicate it might be or is very similar to their old 
> CO-351 product.
> >
> >
> > Cheers, Graham ve3gtc
> >
> > ___
> > 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.
> ___
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> and follow the instructions there.
>
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[time-nuts] Anyone heard of a Rubidium Standard called a Varian X-4700A?

[cdelect]

Jerry,

The 4700A was one of the very first Rubidium standards made.

The V-4700A came first and had the distinction of having a lamp discharge
oscillator that used two submini vacuum tubes in a flip plop
configuration! It was rated at 10,000 hours.

The X-4700A had the more familiar transistor discharge oscillator.

The 3 V-4700 I have seen had been retrofitted with the transistor
version.

The first thing that comes to mind when you try to move one is "boat
anchor" (maybe one for an aircraft carrier!) (weighs 95 pounds)

I have a brochure that lists the price @ $15,900, the short term
stability at 1 sec of 1X10-11th and the long term stability of
5X10-11th/year.

They are "fixed" frequency units with the unit returned to the factory
for a new cell if the time scale changed.

I also have a copy of the manual I can reproduce at cost if you need it.

Corby Dawson

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Re: [time-nuts] VECTRON 371Y383 oscillator

[Gerald Chafee]

Hello Stan,

I am in Upstate NY and am heading to for a week's vacation at the Cape in
another 10 days.

I unfortunately let my ham license expire a while back but was looking at
renewing or get a new call ( old call - KA0DRP).

I was wondering how at the Cape, is the propagation in the HF bands a lot
better as you have the sandy soil that is probably damp which would make
for a good ground plane. I would think that a shack on the cape would be
ideal for DX.

Years ago I was in the Air force and stationed on a listening post near
Iraklion, Crete, Greece. The propagation that was unbelievable. I did not
have a way to transmit, but the reception was unbelievable. It was like
being in a tunnel to stations that were 1000 - 3000 miles away. We could
hear a 10 watt (U.S. military) HF transmitter in Korea at 20 meters in the
afternoon as if it were 10 miles away. We used to tune into the Citizens
Band frequencies and pick up U.S. Stations at various times.

I was wondering if the close proximity to the ocean has shown to be a boon
for long distance communications for you?

Thanks,

Jerry


On Mon, Aug 12, 2013 at 9:10 AM, stan, W1LE  wrote:

> Make a phone call to the NH plant. Ask a product specialist for details.
> May get shuffled to the PA plant.  Persisit.
>
> Stan, W1LE Cape Cod
>
>
>
> On 12-Aug-13 8:53 AM, Collins, Graham wrote:
>
>> Good day all,
>>
>> I recently purchased a VECTRON 10Mhz oscillator like the one in the this
>> eBay listing 38133695
>>
>> Very typical of some of VECTRON older offerings but I have been unable to
>> find much if any information on this oscillator. I haven't yet emailed
>> VECTRON but thought I might first ask the learned members of this list if
>> anyone has or knows any details before I plug it in to see what I get.
>>
>> The oscillator is marked 371Y383 which a search of VECTRONS returns
>> nothing but comparing to pictures and drawings of some older VECTRON units
>> seems to indicate it might be or is very similar to their old CO-351
>> product.
>>
>>
>> Cheers, Graham ve3gtc
>>
>> __**_
>> 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.
>>
>>
> __**_
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> To unsubscribe, go to https://www.febo.com/cgi-bin/**
> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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[time-nuts] WWVB rcvr/comparator

[Robert Roehrig]

Just curious as to who else might be using a home-brew WWVB receiver/comparator.
Bob K9EUI
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Re: [time-nuts] WWVB rcvr/comparator

[Chris Albertson]

It's on my list of things to do.  I'm more interested in tracking the delay
as a way to study radio propagation.


On Tue, Aug 13, 2013 at 1:58 PM, Robert Roehrig  wrote:

> Just curious as to who else might be using a home-brew WWVB
> receiver/comparator.
> Bob K9EUI
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-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] WWVB rcvr/comparator

[paul swed]

One other and I would have to go track him down. Have not heard from him in
a long time.


On Tue, Aug 13, 2013 at 4:58 PM, Robert Roehrig  wrote:

> Just curious as to who else might be using a home-brew WWVB
> receiver/comparator.
> Bob K9EUI
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Re: [time-nuts] WWVB rcvr/comparator

[paul swed]

Chris sorry did not see your email. Blind I guess. Actually thats what I
find fascinating also.
As a reference comparison wwvb is quite poor compared to loran c or GPS
approx 3 decades worse. But it sure is interesting to watch. Its a shame
paper recorders aren't anymore. I loved to pull a strip over a day or 2 and
look. Now I use a Dig-i-tal recorder works very well makes great files but
you can't scribble notes on it to easily. I guess I am over the hill.
Regards
Paul.


On Tue, Aug 13, 2013 at 8:03 PM, paul swed  wrote:

> One other and I would have to go track him down. Have not heard from him
> in a long time.
>
>
> On Tue, Aug 13, 2013 at 4:58 PM, Robert Roehrig  wrote:
>
>> Just curious as to who else might be using a home-brew WWVB
>> receiver/comparator.
>> Bob K9EUI
>> ___
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>> and follow the instructions there.
>>
>
>
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[time-nuts] Propagation using GPS for Timing

[Brooke Clarke]

Hi Chris:

For me the best way to see what propagation is doing is with some from of chirp 
receiver.
With the RCS-5 you get a plot of the height of the various layers in real time along with a signal quality metric for 
the path between you and the target chirp transmitter.

There are a number of other ways to get this data that do not involve a 
commercial chirp receiver.
http://www.prc68.com/I/RCS-5A.shtml

Since chirp transmissions cover 2 to 30 MHz you don't choose the transmitter based on frequency, rather you use it's 
start time.
That's best done using a GPS timing receiver for synchronization. There's a way to do that using a computer sound card 
where the GPS 1PPS goes into one channel and the audio from a (hopefully programmable) HF receiver into the other channel.


In some cases you can see a signal that's been all the way around the Earth one 
or more times.

I think this is also a great way to evaluate a receive antenna.

Have Fun,

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

Chris Albertson wrote:

It's on my list of things to do.  I'm more interested in tracking the delay
as a way to study radio propagation.


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Re: [time-nuts] WWVB rcvr/comparator

[Max Robinson]

Mine isn't home brew, it's a Lavoie Laboratories.  All tubes.

Regards.

Max.  K 4 O DS.

Email: m...@maxsmusicplace.com

Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
Woodworking site 
http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html

Music site: http://www.maxsmusicplace.com

To subscribe to the fun with transistors group send an email to.
funwithtransistors-subscr...@yahoogroups.com

To subscribe to the fun with tubes group send an email to,
funwithtubes-subscr...@yahoogroups.com

To subscribe to the fun with wood group send a blank email to
funwithwood-subscr...@yahoogroups.com

- Original Message - 
From: "Chris Albertson" 
To: "Robert Roehrig" ; "Discussion of precise time and 
frequency measurement" 

Sent: Tuesday, August 13, 2013 6:45 PM
Subject: Re: [time-nuts] WWVB rcvr/comparator


It's on my list of things to do.  I'm more interested in tracking the 
delay

as a way to study radio propagation.


On Tue, Aug 13, 2013 at 1:58 PM, Robert Roehrig  wrote:


Just curious as to who else might be using a home-brew WWVB
receiver/comparator.
Bob K9EUI
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--

Chris Albertson
Redondo Beach, California
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[time-nuts] FW: [ntp:questions] Start of new GPS 1024 week epoch

[Mark C. Stephens]

David Malone is on the ball Magnus, he replied to your post with a patch for 
nnmea refclock drver...

The changes to reclock_nmea will be interesting to see over next few weeks..
I do hope it is officially picked up, as there are a lot of people stranded in 
1993!


--marki

-Original Message-
From: questions-bounces+marks=non-stop.com...@lists.ntp.org 
[mailto:questions-bounces+marks=non-stop.com...@lists.ntp.org] On Behalf Of 
David Malone
Sent: Wednesday, 14 August 2013 5:30 AM
To: questi...@lists.ntp.org
Subject: Re: [ntp:questions] Start of new GPS 1024 week epoch

Magnus Danielson  writes:

>Remember that any Sunday, it is likely that a GPS reciever have slipped 
>a multiple of 1024 weeks. NTP drivers should be able to recognice it 
>and compensate for it, as it is a re-occuring bug in many recievers.

>This issue have been discussed over and over again at time-nuts.

It seems my ancient GPSclock 200 has recently slipped back to December 1993 
too. Resetting it hasn't helped and I doubt I will be able to do a firmware 
update, so I've made a hack to refclock_nmea.c (version ntp-4.2.6p5), by 
replacing:

reftime.l_ui += caltontp(&date);

with 

reftime.l_ui += caltontp(&date);
while (reftime.l_i + 512*7*86400 < rd_timestamp.l_i)
reftime.l_i += 1024*7*86400;

I'm trying to adjust the timestamp given by NMEA might be slow by some multiple 
of 1024 weeks, and so tries to adjust it so that it is reasonably close to the 
system time associated with the read of the NMEA data.  I'm not sure if I've 
got the code exactly bang-on, but it has got ntp running with the unit again.

David.

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