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> Subject: Re: [time-nuts] Interesting frequency standard project
>
> At 06:27 PM 7/4/2014, Hal Murray wrote:
>
>>>... we have no requirement for that level of stability on the MW
>>>broadcasts.
>>
>>How stable are they?
>
> That varies gr
-0400
From: "Dale H. Cook"
To: time-nuts@febo.com
Subject: Re: [time-nuts] Interesting frequency standard project
At 06:27 PM 7/4/2014, Hal Murray wrote:
... we have no requirement for that level of stability on the MW
broadcasts.
How stable are they?
That varies greatly from sta
At 06:27 PM 7/4/2014, Hal Murray wrote:
>>... we have no requirement for that level of stability on the MW broadcasts.
>
>How stable are they?
That varies greatly from station to station depending upon what transmitter
they are running. Note also that compliance with the 20 Hz accuracy requireme
consultants.com/DCF
>
> Bob LaJeunesse
>
>
>>
>> From: Alexander Pummer
>> To: Discussion of precise time and frequency measurement
>>
>> Sent: Friday, July 4, 2014 6:35 PM
>> Subject: Re: [time-nuts] Interesting fr
e fun with wood group send a blank email to
funwithwood-subscr...@yahoogroups.com
- Original Message -
From: "Robert LaJeunesse"
To: "Discussion of precise time and frequency measurement"
Sent: Friday, July 04, 2014 7:53 PM
Subject: Re: [time-nuts] Interesting f
LaJeunesse"
To: "Discussion of precise time and frequency measurement"
Sent: Friday, July 04, 2014 7:53 PM
Subject: Re: [time-nuts] Interesting frequency standard project
Details of the DCF77 project, including source code, can be seen without an
Elektor subscription / member
- Original Message -
From: "Alexander Pummer"
To: "Discussion of precise time and frequency measurement"
Sent: Friday, July 04, 2014 5:59 PM
Subject: Re: [time-nuts] Interesting frequency standard project
for an AM station is strait forward at first use a narrow filte
Discussion of precise time and frequency measurement
>Sent: Friday, July 4, 2014 6:35 PM
>Subject: Re: [time-nuts] Interesting frequency standard project
>
>
>
>there was an article in the January 2012issue of the elektor "DCF77
>locked reference", the DCF77 ha
On Fri, Jul 4, 2014 at 5:27 PM, Hal Murray wrote:
>
> paulsw...@gmail.com said:
> > The key to these systems is that the transmitters have very good
> references.
> > In the US at least we have no requirement for that level of stability on
> the
> > MW broadcasts. Though evidently some stations a
for an AM station is strait forward at first use a narrow filter to make
sure that you have just one station and feed the filter out put into a
limiter the output of the limiter will be the carrier.
73
KJ6UHN Alex
On 7/4/2014 3:27 PM, Hal Murray wrote:
paulsw...@gmail.com said:
The key to the
there was an article in the January 2012issue of the elektor "DCF77
locked reference", the DCF77 has very similar modulation format as the
new modultion format of the WWVB
73
KJ6UHN Alex
On 7/4/2014 2:21 PM, paul swed wrote:
An interesting article much like one Bert sent me circa 1989 quite
You have to log in to see all the files for the project. I am not a
member so I couldn't log in.
Seems it is a pay to be a member sort of thing but joining as a member
gets you a subscription too.
Interesting business model.
I have been a fan of Elektor for as long as I can remember and I wi
paulsw...@gmail.com said:
> The key to these systems is that the transmitters have very good references.
> In the US at least we have no requirement for that level of stability on the
> MW broadcasts. Though evidently some stations are quite good. I think I have
> a list some place have to re-look
Hi
Back a long time ago (when the rules were written) 20 Hz sounded like a pretty
good stability limit on MW. The idea of anybody having a speaker that could
reproduce beat notes in the 20 to 40 Hz range a likely thing.
Fast forward many decades, and indeed people *do* have speakers that do pr
An interesting article much like one Bert sent me circa 1989 quite recently.
The key to these systems is that the transmitters have very good references.
In the US at least we have no requirement for that level of stability on
the MW broadcasts. Though evidently some stations are quite good. I thin
I am sure there are others on list who follow Elektor Magazine and even perhaps
their forums but there are likely many that do not.
I stumbled across this interesting frequency standard project and thought
others might also be interested:
http://www.elektor-labs.com/project/low-cost-frequency-s
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