Date   
Repeaters with no PL tone [WAS: W6EK 2M Repeater Failure Update]

Jef - N5JEF
 

Nathan, if you think having a repeater with no PL tone is interesting, take a look at this info about the Seattle Repeater Group's system:

- Jef  N5JEF

From http://www.qsl.net/srg/index.html
Seattle Repeater Group (SRG)'s highly computerized repeater is located "High atop Green Mountain" eight miles west of Bremerton, Washington on the Kitsap Penninsula. This repeater is owned by the Seattle Repeater Group and administered by Phil, K7PF. It is allocated the frequency pair 146.28/146.88.

The SRG repeater has several unique operating characteristics of which a user must be aware. A half second of audio silence is necessary to start the repeater. A weak signal may not start it, but can answer once the system is up. Any sub-audible tone will totally prevent startup. The repeater possesses a defense against Kerchunking.

The "courtesy" beep (at the end of each transmission") tells users that the repeater is available for use, and that all timers have been reset. It is actually not a tone but a direct FM data burst at 9600 bits per second which sounds like a tone, sometimes. If you have an IBM PC (or clone), with EGA or higher graphics, you, too, can read this data burst, identify users, and tell about the characteristics of each transmission. "

http://www.qsl.net/srg/operations.htm#KERCHUNK

"Kerchunking" (keying up and immediately releasing the microphone button) the repeater momentarily may result in a CW "?" or a "Please Identify" voice message. Nothing will have been repeated.

The repeater is immediately put into AUTOVOX mode and remains there until the next even minute (every two minutes.) Further Kerchunks have no effect.

One must exceed the 2 KHz LOW DEVIATION threshold to start the repeater while it is in AUTOVOX mode. Successful starting cancels the AUTOVOX (until the next Kerchunk, of course.)

http://www.qsl.net/srg/fingerprint.htm

On Wed, Mar 11, 2020 at 8:29 AM Nathan Chilton - K6NDC <k6ndc@...> wrote:
When I was in Atlanta, I came across a repeater without a CTCSS/DCS tone listed in RepeaterBook.  I assumed it was an oversight, but then I found that I could activate the repeater by just transmitting on the input frequency without any tone at all.  That's the first time I'd come across a repeater without any input tone.

_._,_._,_

Re: W6EK 2M Repeater Failure Update

Nathan Chilton - K6NDC
 

When I was in Atlanta, I came across a repeater without a CTCSS/DCS tone listed in RepeaterBook.  I assumed it was an oversight, but then I found that I could activate the repeater by just transmitting on the input frequency without any tone at all.  That's the first time I'd come across a repeater without any input tone.

Re: In-person classes canceled at Berkeley

Alan Thompson
 

Heh, I was just sitting here learning how to use Zoom. I had a presentation coming up for the Stockton Delta Club and now I won't be able to make it in person.

It's surprisingly simple to set up and use on both ends, and does exactly what I needed with the main PowerPoint presentation in full screen, with a talking head inset in the corner. Also has the ability to record the presentation. Very cool!

Probably should buy stock in Zoom. These companies are poised to profit from the current situation.

Re: In-person classes canceled at Berkeley

Nathan Chilton - K6NDC
 

I like his progression. Zoom is an excellent videoconferencing application. We started using it about a year ago at work and now all of our conference rooms are equipped with it. I use it all the time to communicate with coworkers in our Atlanta office. 

Updated Event: SFARC Board Meeting - Friday, 13 March 2020 #cal-invite

sfarc@w6ek.groups.io Calendar <sfarc@...>
 
Edited

SFARC Board Meeting

When:
Friday, 13 March 2020
6:00pm to 7:00pm
(UTC-07:00) America/Los Angeles

Where:
Online GoTo Meeting Teleconference

Description:

The Board Meeting will be held online via the GoTo Meeting teleconference platform on Friday, March 13, 2020 @ 6pm. The meeting is open to SFARC members only, and we encourage you to attend and participate. For information about how to join the conference, please send an email request to and SFARC Officer. Email address' are printed in the Club Roster.
 
We apologize for any inconvenience that this schedule change may cause, but the health of our membership, visitors and community is our primary concern.  We will make every effort to notify members and attendees of these schedule changes via email, telephone and social media. We will update the W6EK.org website, on Facebook and Groups.io with additional information as it becomes available.  Please help us spread the word.

 

Re: In-person classes canceled at Berkeley

Greg D
 

:) Perfect!

I SO miss my honors physics classes at Berkeley! The staff there made
things both approachable and enjoyable. I remember spending one class
out on Faculty Glade throwing boomerangs with the professor to get a
hands-on feel for gyroscopes and various aspects of rotational physics.
But I quickly realized that computer engineering was fun too, and I
could actually get a paying job doing it. And the rest, so they say, is
history.

If this thing continues, we can hold the April meeting on the club
repeater, with presentation slides sent via slow-scan TV.

Greg KO6TH


Aaron K6ABJ wrote:

In-person classes at Berkeley have been canceled. Professor Christian Schmid’s physics students received the following notice:

Aaron, K6ABJ




Re: Me and my dog

Alan Thompson
 

Ha Ha! That's Great!

Cancelled Event: Loomis Hamfest 2020 - Saturday, 21 March 2020 #cal-cancelled

sfarc@w6ek.groups.io Calendar <sfarc@...>
 

Cancelled: Loomis Hamfest 2020

This event has been cancelled.

When:
Saturday, 21 March 2020

Where:
Historic Loomis Train Depot, Loomis, California

Organizer: Orion\, AI6JB

Description:

In-person classes canceled at Berkeley

Aaron K6ABJ
 

In-person classes at Berkeley have been canceled. Professor Christian Schmid’s physics students received the following notice:

Aaron, K6ABJ

Cancelled Event: General Meeting - CANCELLED - Friday, 13 March 2020 #cal-cancelled

sfarc@w6ek.groups.io Calendar <sfarc@...>
 

Cancelled: General Meeting - CANCELLED

This event has been cancelled.

When:
Friday, 13 March 2020
7:30pm to 9:30pm
(UTC-07:00) America/Los Angeles

Where:
1225 Lincoln Way, Auburn, CA - City Hall, Rose Room

Description:

Hello SFARC Members,

 

The SFARC Board is monitoring the corona virus advisories as they affect public meetings in California. Today a COVID-19 advisory issued by Placer County. 
https://www.placer.ca.gov/6454/Recommend-COVID-19-mitigation

Please note the following recommendation:
" Large Gatherings: Those who are planning large gatherings should consider modifying, postponing or canceling them, especially if large numbers of people will be within arm’s length of each other. Follow posted CDPH guidance under Scenario II."

 

This evening the full board discussed the Placer County advisory, our ability to provide a safe venue based on the CDPH guidance and the potential for impact to our membership and community. Based on the county advisory and the fluidity of the evolving situation, the board has voted to modify our upcoming meeting and event schedule, therefore cancelling this month's General Meeting.

Me and my dog

Aaron K6ABJ
 

Here is a picture and me and my dog...



Aaron

DX Convention Cancelled

carl.wf6j@gmail.com
 

Got this on FB:

Visalia DX convention canceled (postponed) due to COVID-19. #hamradio #DXIsnt

For the good of the order re latest COVID-19 info for avoidance of exposure

Jim - N6MED
 

Though this is not radio related, I believe it to be quite serious. Please take it in the spirit I intend.
You've been hearing about how to avoid getting exposed to this rather contagious cootie. I have several subscriptions to highly credible clinical on-line news letters and periodicals. To day I received the following from one of these, Medscape for Nurses. Consider the information when you use public rest room facilities and how to keep your hands clean after you have washed them.

The following information was sourced from JAMA, the Journal of the American Medical Association.

Jim / N6MED

Coronavirus May Cause Environmental Contamination Through Fecal Shedding
Andrew D. Bowser

March 6, 2020

Editor's note: Find the latest COVID-19 news and guidance in Medscape's  Coronavirus Resource Center .    

The toilet bowl, sink, and bathroom door handle of an isolation room housing a patient with the novel coronavirus tested positive for the virus, raising the possibility that viral shedding in the stool could represent another route of transmission, investigators reported.

Air outlet fans and other room sites also tested positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), though an anteroom, a corridor, and most personal protective equipment (PPE) worn by health care providers tested negative, according to the researchers, led by Sean Wei Xiang Ong, MBBS, of the National Centre for Infectious Diseases, Singapore.

Taken together, these findings suggest a "need for strict adherence to environmental and hand hygiene" to combat significant environmental contamination through respiratory droplets and fecal shedding, Dr. Ong and colleagues wrote in JAMA.

 

Aaron Eli Glatt, MD, chair of medicine at Mount Sinai South Nassau in New York, said these results demonstrate that SARS-CoV-2 is "clearly capable" of contaminating bathroom sinks and toilets.

"That wouldn't have been the first place I would have thought of, before this study," he said in an interview. "You need to pay attention to cleaning the bathrooms, which we obviously do, but that's an important reminder."

The report by Dr. Ong and coauthors included a total of three patients housed in airborne infection isolation rooms in a dedicated SARS-CoV-2 outbreak center in Singapore. For each patient, surface samples were taken from 26 sites in the isolation room, an anteroom, and a bathroom. Samples were also taken from PPE on physicians as they left the patient rooms.

However, for the third patient, samples were taken before routine cleaning. In this case, Dr. Ong and colleagues said 13 of 15 room sites (87%) were positive, including air outlet fans, while 3 of 5 toilet sites (60%) were positive as well, though no contamination was found in the anteroom, corridor, or in air samples.

That patient had two stool samples that were positive for SARS-CoV-2, but no diarrhea, authors said, and had upper respiratory tract involvement without pneumonia.

All PPE samples tested negative, except for the front of one shoe.

"The risk of transmission from contaminated footwear is likely low, as evidenced by negative results in the anteroom and corridor," they wrote.

While this study included only a small number of patients, Dr. Glatt said the findings represent an important and useful contribution to the literature on coronavirus disease 2019 (COVID-19).

"Every day we're getting more information, and each little piece of the puzzle helps us in the overall management of individuals with COVID-19," he said in the interview. "They're adding to our ability to manage, control, and mitigate further spread of the disease."

Funding for the study came from the National Medical Research Council in Singapore and DSO National Laboratories. Dr. Ong and colleagues reported no conflicts of interest.

JAMA. Published online March 4, 2020. Full text

Upcoming Event: SFARC Net - Thu, 03/12/2020 7:30pm-8:30pm #cal-reminder

sfarc@w6ek.groups.io Calendar <sfarc@...>
 

Reminder: SFARC Net

When: Thursday, 12 March 2020, 7:30pm to 8:30pm, (GMT-07:00) America/Los Angeles

Where:W6EK Repeater - 145.430 -600, PL162.2

View Event

Description: Check-in for Club updates from Officers and members, QSTs and more. Everyone is welcome!

Re: Corona Virus Updates for Club Activities

Stuart - AK6XR
 

Thanks Brian for keeping us in the loop. Much appreciated. 

Stuart Clark, AK6XR 

.
Monitored by the NSA. 
 III      🇺🇸

On Mar 10, 2020, at 13:39, Brian Gohl - AI6US <ai6us@...> wrote:


March 10, 2020

The SFARC Board is monitoring the corona virus advisories as they affect public meetings in California. Currently, we are proceeding with meetings and events as usual. 
 
We are requesting that those attending to be aware of the CDC and other recommendations for attendance. Please check this page,  SFARC Groups.io and Facebook pages for updates on this fluid situation. Thank you!
--
Brian- AI6US

Re: Loomis Hamfest Planning Meeting Reminder

Orion, AI6JB
 

Good Afternoon Everyone!

We are postponing tonight's Hamfest Planning Meeting to next Tuesday, 3/17/20, starting @ 5:00 PM in front of the Loomis Historic Train Depot.

Sorry for the late cancellation.

73
Orion, AI6JB
Loomis Hamfest Chair

Corona Virus Updates for Club Activities

Brian Gohl - AI6US
 

March 10, 2020

The SFARC Board is monitoring the corona virus advisories as they affect public meetings in California. Currently, we are proceeding with meetings and events as usual. 
 
We are requesting that those attending to be aware of the CDC and other recommendations for attendance. Please check this page,  SFARC Groups.io and Facebook pages for updates on this fluid situation. Thank you!
--
Brian- AI6US

Re: How Rockets are Made #QST

Orion, AI6JB
 

Yes, Dennis a very fascinating find!

 

I was most in awe at the fact with all the high tech and tight tolerances, the human eye, i.e. craftsman, is more accurate than automation when they are breaking the huge aluminum panels.

 

73

Orion Endres, AI6JB

1201 Wood Oak Court, Roseville, CA 95747-7383

(916) 788-8251 H \\ (916) 534-8251 C

 

What the heck does “73” mean?  73 is morse code short hand for “Best Regards” used by Ham radio operators.  It’s origin goes all the way back to the landline telegraph days.

 

 

 

From: sfarc@w6ek.groups.io <sfarc@w6ek.groups.io> On Behalf Of Richard - AA6RS
Sent: Tuesday, March 10, 2020 08:50
To: sfarc@w6ek.groups.io; kb7qwc@...
Cc: wu6x@...
Subject: Re: [from W6EK Groups.io] How Rockets are Made #QST

 

Thanks Dennis

I found the videos very interesting, especially when compared to operations at Space-X (notably no engine assembly). I have been privileged to tour Space-X a couple times (my son works there) and there is a huge difference in materials (more composites) and automation (more). But of course the end products serves very different needs and customers. 

 

Thanks for posting

Rich aa6rs

 

Richard Snyder

m  510-918-3409

AA6RS@...

 

               "In small things considered is the world revealed"



On Mar 9, 2020, at 23:09, Gary - KB7QWC <kb7qwc@...> wrote:



Dennis,

   This video was great!  Thanks for sharing it.

 

   …Gary Willet, KB7QWC  WREN366

 

This video takes you through the United Launch Alliance (ULA) rocket factory in Decatur, AL just down the street from the US Space & Rocket Center in Huntsville, AL. If you've been to the US Space & Rocket Center (I've been twice) to see the finished product, or you are an engineer, you will thoroughly enjoy this video tour by CEO Tory Bruno, a real "rocket scientist" turned executive. It's a long video, but well worth it. The Decatur factory designs and builds the Atlas V, Delta IV, and the new Vulcan Centaur rocket. Unbelievable technical and engineering expertise!

https://www.youtube.com/watch?v=o0fG_lnVhHw

Enjoy,
Dennis - WU6X

Re: How Rockets are Made #QST

Richard - AA6RS
 

Thanks Dennis
I found the videos very interesting, especially when compared to operations at Space-X (notably no engine assembly). I have been privileged to tour Space-X a couple times (my son works there) and there is a huge difference in materials (more composites) and automation (more). But of course the end products serves very different needs and customers. 

Thanks for posting

Rich aa6rs

 

Richard Snyder

m  510-918-3409

AA6RS@...

 

               "In small things considered is the world revealed"


On Mar 9, 2020, at 23:09, Gary - KB7QWC <kb7qwc@...> wrote:



Dennis,

   This video was great!  Thanks for sharing it.

 

   …Gary Willet, KB7QWC  WREN366

 

This video takes you through the United Launch Alliance (ULA) rocket factory in Decatur, AL just down the street from the US Space & Rocket Center in Huntsville, AL. If you've been to the US Space & Rocket Center (I've been twice) to see the finished product, or you are an engineer, you will thoroughly enjoy this video tour by CEO Tory Bruno, a real "rocket scientist" turned executive. It's a long video, but well worth it. The Decatur factory designs and builds the Atlas V, Delta IV, and the new Vulcan Centaur rocket. Unbelievable technical and engineering expertise!

https://www.youtube.com/watch?v=o0fG_lnVhHw

Enjoy,
Dennis - WU6X

Re: How Rockets are Made #QST

Gary - KB7QWC
 

Dennis,

   This video was great!  Thanks for sharing it.

 

   …Gary Willet, KB7QWC  WREN366

 

This video takes you through the United Launch Alliance (ULA) rocket factory in Decatur, AL just down the street from the US Space & Rocket Center in Huntsville, AL. If you've been to the US Space & Rocket Center (I've been twice) to see the finished product, or you are an engineer, you will thoroughly enjoy this video tour by CEO Tory Bruno, a real "rocket scientist" turned executive. It's a long video, but well worth it. The Decatur factory designs and builds the Atlas V, Delta IV, and the new Vulcan Centaur rocket. Unbelievable technical and engineering expertise!

https://www.youtube.com/watch?v=o0fG_lnVhHw

Enjoy,
Dennis - WU6X