We live in a world with atomic clocks and other devices that tick at a very fixed rate. We just take that for granted.
The Roman concept was to simply divide the day light time, what ever it was on any given day, into 12 hours.? Compared with our clocks, the daytime hours in winter would be shorter than the daylight hours in the summer.?
Many sundials work with a pointer, called a gnomon, that casts a shadow on a plate with lines labeled with time. They need to be lines because the sun is at different elevations on different seasons.?
Compare the scale for Roman vs "modern" sundials.? At the equinox, both scales would cross because the 12 hours of a Roman day agree with our concept of 12 hours.? In winter and summer, the lines would be quite different.
I said "many sundials".? I have a sundial that folds flat for storage. In use it opens into a sphere.? It can be easily adjusted for any latitude on earth.? I even tried it in South Africa.
A related instrument from long ago is the astrolabe.? I recall seeing a photograph in my school history book.? All it said was that these were used for centuries, but replaced by the sextant.?
I also have a pocket size astrolabe.? It includes many features, like map of major stars in the sky. It has many uses, including telling time from the position of the sun.
I only recently learned why sextants made astrolabes obsolete.? That was shortly after telescopes were invented and people like Tycho Brahe used them to make more accurate measurements of the heavens. Yes, the modern sextant is more accurate, but star charts and other information for celestial navigation is not included.? My guess is that the printing press made it possible to put that into printed books.
On Saturday, November 2, 2024 at 04:10:26 PM PDT, Doug Hendricks <ki6ds1@...> wrote:
Paul do you want to explain that last statement about the sun rising at 6 am and setting at 6 pm???
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Paul do you want to explain that last statement about the sun rising at 6 am and setting at 6 pm???
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Personally, I think day light savings time is a reasonable way to deal with the changing solar time.? In summer I wish for double DST because the sun is steaming in my window long before it is time to get up.? There¡¯s seldom much DX at dawn, but often good DX hours after sunset. ?
The fall change isn¡¯t too much bother because natural circadian rhythm tends to be longer then 24 hours.?? The spring change and getting up early that can be more stressful. ?
Very few people on this email have a schedule that is tightly linked to some scheduled activity like working in an office.? So don¡¯t make the change in a one jump.?? Adjust your daily activity like meals and wake up by 30 minutes. Then, a couple days later, by another 30 minutes.?? ?
A couple years ago I was preparing for a long trip.? Starting well ahead, I set my alarm 30 minutes earlier each day.?? I remember being confused when Al Roker wasn¡¯t on the TV when I was eating breakfast.? The first morning in London I woke up at dawn ready to go.
A history lesson:? The Roman¡¯s had many sundials.? Important public building had sundials.? Big private homes had sundials.? They were cut from stone.? No moving parts.? They were made so the sun rose at 6AM and set at 6 PM, every day. 12 hours of sunlight everyday all year round.? Obviously workers were expected to get more done during a summer day than a winter day.
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You have it right.? ?Remember Antenna to in, out to radio.? Enjoy?
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I Doug, ?thank you so much for it. I went to lunch today and Dave gave it to me. He said you had some instructions on how to use it but that basically I had to make this string... antenna -> external tuner -> band pass filter -> rig (which may or maybe may not have a tuner). Must be qrp, I would use 10 watts max. ?Is this right. I will send you an email with more information.?
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Sorry I missed you at Pacificon. As you had mentioned the talks they had were not that interesting to me. I think the last one that I enjoyed the most was Vic who gave a talk on SOTA and chasing SOTA with a qrp rig.?
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I think next year I will get a room and stay for all the qrp activities.....that would have been fun and I would have learned a lot.?
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Are you ever coming up this way to join the "Bayland Boys" for lunch and ops? We had a big turnout yesterday for lunch. 10 Bayland boys and me, 1 Bayland lady. It was fun. The Friday lunches are really the highlight of my week. I always get inspired sitting and talking with the boys. They are all so helpful.
?
Joy
N6GO
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Joy, have you been able to try thr band pass filter?? I am curious.? ?Doug
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Some AI bot figured no actual human could write so many messages!
On Thursday, October 31, 2024 at 07:03:43 PM PDT, Hiroki Kato <hiroki@...> wrote:
Thanks Dave, But I wonder how the system unsubscribed me to begin with.
On Oct 31, 2024, at 17:35, David W Crocker via groups.io <dwcae@...> wrote:
?Hiroki,
I saw your request and resubscribed you.
Dave
On Thu, Oct 31, 2024 at 15:42, HOWARD POMERANTZ <HOWPOM@...> wrote: I plan to be there for lunch and ops.
Hiroki, I will bring my dead Zachtek for your ministrations.
On Oct 31, 2024, at 6:34 AM, David W Crocker via < dwcae@...> wrote:
I will be there also and stay for the PAARA meeting. Dave W6VYC? On Wed, Oct 30, 2024 at 6:53, Hiroki Kato I will be at the Baylands starting with lunch. Hope to see many of you. The high bands seem to be hot. I am seeing a lot of WSPR activities on the 10m. Thank you Eric and Jeff to acknowledge my signal on the forum. Has anyone else been experiencing an odd behavior of the [email protected] site? It sent out a message saying that I am unsubscribed and a few days later it sent out the message that I am newly subscribed. It looked as though the site has been manipulated from outside. Hiroki AH6CY
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I'll be at lunch and for a little while at the Baylands before
getting my covid shot at 3.
Dick, K6PBF
On 10/31/2024 3:42 PM, HOWARD POMERANTZ
wrote:
toggle quoted message
Show quoted text
I plan to be there for lunch and ops.
Hiroki, I will bring my dead Zachtek for your
ministrations.
On Oct 31, 2024, at 6:34 AM, David W Crocker
via < dwcae@...>
wrote:
I will be there also and stay for the PAARA
meeting.
Dave W6VYC?
On Wed, Oct 30, 2024 at 6:53, Hiroki
Kato
I will be at the Baylands starting with
lunch. Hope to see many of you. The high bands seem
to be hot. I am seeing a lot of WSPR activities on
the 10m.
Thank you Eric and Jeff to acknowledge my signal on
the forum. Has anyone else been experiencing an odd
behavior of the [email protected] site?
It sent out a message saying that I am unsubscribed
and a few days later it sent out the message that I
am newly subscribed. It looked as though the site
has been manipulated from outside.
Hiroki AH6CY
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I'll be there for lunch and hopefully some operating time.
?
Chris W6COV
?
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Thanks Dave, But I wonder how the system unsubscribed me to begin with.
toggle quoted message
Show quoted text
On Oct 31, 2024, at 17:35, David W Crocker via groups.io <dwcae@...> wrote:
?Hiroki,
I saw your request and resubscribed you.
Dave
On Thu, Oct 31, 2024 at 15:42, HOWARD POMERANTZ <HOWPOM@...> wrote: I plan to be there for lunch and ops.
Hiroki, I will bring my dead Zachtek for your ministrations.
On Oct 31, 2024, at 6:34 AM, David W Crocker via < dwcae@...> wrote:
I will be there also and stay for the PAARA meeting. Dave W6VYC? On Wed, Oct 30, 2024 at 6:53, Hiroki Kato I will be at the Baylands starting with lunch. Hope to see many of you. The high bands seem to be hot. I am seeing a lot of WSPR activities on the 10m. Thank you Eric and Jeff to acknowledge my signal on the forum. Has anyone else been experiencing an odd behavior of the [email protected] site? It sent out a message saying that I am unsubscribed and a few days later it sent out the message that I am newly subscribed. It looked as though the site has been manipulated from outside. Hiroki AH6CY
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Hiroki,
I saw your request and resubscribed you.
On Thu, Oct 31, 2024 at 15:42, HOWARD POMERANTZ <HOWPOM@...> wrote: I plan to be there for lunch and ops.
Hiroki, I will bring my dead Zachtek for your ministrations.
On Oct 31, 2024, at 6:34 AM, David W Crocker via < dwcae@...> wrote:
I will be there also and stay for the PAARA meeting. Dave W6VYC? On Wed, Oct 30, 2024 at 6:53, Hiroki Kato I will be at the Baylands starting with lunch. Hope to see many of you. The high bands seem to be hot. I am seeing a lot of WSPR activities on the 10m. Thank you Eric and Jeff to acknowledge my signal on the forum. Has anyone else been experiencing an odd behavior of the [email protected] site? It sent out a message saying that I am unsubscribed and a few days later it sent out the message that I am newly subscribed. It looked as though the site has been manipulated from outside. Hiroki AH6CY
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I plan to be there for lunch and ops.
Hiroki, I will bring my dead Zachtek for your ministrations.
toggle quoted message
Show quoted text
On Oct 31, 2024, at 6:34 AM, David W Crocker via < dwcae@...> wrote:
I will be there also and stay for the PAARA meeting. Dave W6VYC? On Wed, Oct 30, 2024 at 6:53, Hiroki Kato I will be at the Baylands starting with lunch. Hope to see many of you. The high bands seem to be hot. I am seeing a lot of WSPR activities on the 10m. Thank you Eric and Jeff to acknowledge my signal on the forum. Has anyone else been experiencing an odd behavior of the [email protected] site? It sent out a message saying that I am unsubscribed and a few days later it sent out the message that I am newly subscribed. It looked as though the site has been manipulated from outside. Hiroki AH6CY
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I plan to be at lunch tomorrow.
?
joy
(I¡¯m feeling lower case today)
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The qrp ops group has been fine as far as I can tell.?
I did see you test message the other day but sense others responded to you I didn¡¯t.?
Joy
N6GO
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I will be there also and stay for the PAARA meeting.
On Wed, Oct 30, 2024 at 6:53, Hiroki Kato <hiroki@...> wrote: I will be at the Baylands starting with lunch. Hope to see many of you. The high bands seem to be hot. I am seeing a lot of WSPR activities on the 10m. Thank you Eric and Jeff to acknowledge my signal on the forum. Has anyone else been experiencing an odd behavior of the [email protected] site? It sent out a message saying that I am unsubscribed and a few days later it sent out the message that I am newly subscribed. It looked as though the site has been manipulated from outside. Hiroki AH6CY
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Big signal! --David KM6RI
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Do I get a passing grade?
On Tuesday, October 29, 2024 at 07:29:02 PM PDT, Hiroki Kato <hiroki@...> wrote:
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Received in Fresno 599+.? Very good signal, as always.? ?72 Doug?
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David W Crocker
David
Jeff Reagan