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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Ionospheric\s+doppler\s+\?\s*$/: 9 ]

Total 9 documents matching your query.

1. LF: RE: Ionospheric doppler ? (score: 1)
Author: Talbot Andrew <>
Date: Tue, 09 Mar 2004 13:14:06 +0100
Usually these radio controlled clocks only check the time every few hours or when they are turned on. Normally the 1 pulse per second is just derived from the internal oscillator and I would expectyo
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00012.html (12,012 bytes)

2. LF: Re: Ionospheric doppler ? (score: 1)
Author: "Hugh M0WYE" <>
Date: Tue, 09 Mar 2004 14:02:52 +0100
Hi Alberto, What an interesting experiment ! Do we have any idea about the internal workings of the "inexpensive", Conrad clock ? I was wondering if it contained some logic circuits, or even a microc
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00015.html (11,548 bytes)

3. LF: RE: Ionospheric doppler ? (score: 1)
Author: Alberto di Bene <>
Date: Tue, 09 Mar 2004 16:29:59 +0100
Thanks all for your comments. The clock has an analog part, the receiver, with a very small ferrite antenna, and a large black wax blob on the PCB, with many traces reaching it. Usually this is the l
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00017.html (9,771 bytes)

4. Re: LF: RE: Ionospheric doppler ? (score: 1)
Author: Rik Strobbe <>
Date: Tue, 09 Mar 2004 17:11:40 +0100
Alberto, When I remember it right most "DCF-77 IC's" can be forced to receive mode (pulling a pin to ground or so). 73, Rik ON7YD The clock has an analog part, the receiver, with a very small ferrite
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00019.html (10,304 bytes)

5. LF: Re: Ionospheric doppler ? (score: 1)
Author: "Marek SQ5BPM" <>
Date: Tue, 9 Mar 2004 18:29:08 +0100
Hello Group, I made yesterday an interesting experiment and would like to know your opinions about it. [...] Hello Alberto and all, I think that the accuracy will never be sufficient for this kind of
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00021.html (9,791 bytes)

6. LF: Re: Ionospheric doppler ? (score: 1)
Author: "Marek SQ5BPM" <>
Date: Tue, 9 Mar 2004 18:37:06 +0100
[...] 1 / 77500 Hz = ca. 129 uS. ca. 12.9 uS of course (sorry!) 73! Marek SQ5BPM
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00022.html (8,665 bytes)

7. LF: RE: Ionospheric doppler ? (score: 1)
Author: Alberto di Bene <>
Date: Tue, 09 Mar 2004 17:27:57 +0100
Or if you think that you have a fever, you can have some real fun when you explain to your doctor how you measured your temperature! "Doctor, in the last couple of hours my fever went up at a rate o
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00023.html (10,035 bytes)

8. LF: Re: Ionospheric doppler ? (score: 1)
Author: Alberto di Bene <>
Date: Tue, 09 Mar 2004 21:27:06 +0100
I think that the accuracy will never be sufficient for this kind of measurement. I think you must make the comparation, but not whith the Conrad Clock. You musk take the pulse make from the RF signa
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00024.html (10,110 bytes)

9. LF: Re: Ionospheric doppler ? (score: 1)
Author: José Manuel <>
Date: Wed, 10 Mar 2004 11:10:42 +0100
Hi Alberto ad all: When you install the GPS I think that you´ll probably find short-term variations in the same order, + - 100 nsec. 73 de José, EA1PX Hello Group, I made yesterday an interesting exp
/rsgb_lf_group-archives/html/rsgb_lf_group/2004-03/msg00025.html (11,139 bytes)


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