If anyone would like to download the slides from last nights meetings they are available in pptx and pdf formats at the links below. http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pdf http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pptx -- Wyatt Zacharias
Thanks Wyatt -- great discussion. Interesting to point out that while the Manitoba Unix Users Group ( http://muug.mb.ca) had it's meeting discussing RF and radio communications, the Winnipeg Amateur Radio Club (http://winnipegarc.org) had it's meeting a day prior discussing computers and applications. :-) There are at least a half dozen ham radio operators (including Wyatt, who presented) that are MUUG attendees. There is a Winnipeg and regional ham-radio wireless network which is established, operating and routing within the city. This is using amateur radio specific frequencies outside the unlicenced 2.4/5.8 GHz spectrum - that being 2.3/etc frequencies. These frequencies are allocated by Industry Canada and amateur radio operators have assignments in those bands. We also can run higher power with much more directional control of RF than would otherwise be available to the public. As an example, we have sector antennas mounted on a tall building in downtown area which provides a 5 MHz channel. With that, I can sustain 10Mbps down and 2Mbps up on a 20(ish) db antenna mounted on my house - all within the amateur radio spectrum allocation. There are backhaul links for a few other connections that are in place. We also provide a PBX for local and regional calling. To read more, check out: http://va4wan.ampr.org/ Be sure to check out the cool pics of our setups... Thanks to Les (http://les.net) for providing BGP routing and air-fibre connection. One item was mentioned at the meeting and that was there is an upcoming ham radio class where you can write the exam and get your ham radio licence. Information can be found on the WARC website as such: http://winnipegarc.org/basic_course.html It is a highly popular course these days with over 2 dozen currently scheduled in the class. (And no, you don't need to know morse code to get your radio licence these days -- but it is a fun mode). There's been a significant amount of convergence between the radio (RF) world and the digital (CPU) world in the past while -- things are getting interesting. Dan. On 10 February 2016 at 09:10, Wyatt Zacharias <wyatt@magitech.ca> wrote:
If anyone would like to download the slides from last nights meetings they are available in pptx and pdf formats at the links below.
http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pdf http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pptx
-- Wyatt Zacharias
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
forgot to mention -- while all the pics are pretty much mine, I do write about our little project a bit on my radio blog ... if you filter it through -- i haven't indexed the keywords that well -- but you get the picture... http://ve4drk.keizer.ca/ Dan. On 10 February 2016 at 12:07, Dan Keizer <dan@keizer.ca> wrote:
Thanks Wyatt -- great discussion.
Interesting to point out that while the Manitoba Unix Users Group ( http://muug.mb.ca) had it's meeting discussing RF and radio communications, the Winnipeg Amateur Radio Club (http://winnipegarc.org) had it's meeting a day prior discussing computers and applications. :-)
There are at least a half dozen ham radio operators (including Wyatt, who presented) that are MUUG attendees.
There is a Winnipeg and regional ham-radio wireless network which is established, operating and routing within the city. This is using amateur radio specific frequencies outside the unlicenced 2.4/5.8 GHz spectrum - that being 2.3/etc frequencies. These frequencies are allocated by Industry Canada and amateur radio operators have assignments in those bands. We also can run higher power with much more directional control of RF than would otherwise be available to the public. As an example, we have sector antennas mounted on a tall building in downtown area which provides a 5 MHz channel. With that, I can sustain 10Mbps down and 2Mbps up on a 20(ish) db antenna mounted on my house - all within the amateur radio spectrum allocation. There are backhaul links for a few other connections that are in place. We also provide a PBX for local and regional calling. To read more, check out: http://va4wan.ampr.org/ Be sure to check out the cool pics of our setups... Thanks to Les (http://les.net) for providing BGP routing and air-fibre connection.
One item was mentioned at the meeting and that was there is an upcoming ham radio class where you can write the exam and get your ham radio licence. Information can be found on the WARC website as such: http://winnipegarc.org/basic_course.html It is a highly popular course these days with over 2 dozen currently scheduled in the class. (And no, you don't need to know morse code to get your radio licence these days -- but it is a fun mode). There's been a significant amount of convergence between the radio (RF) world and the digital (CPU) world in the past while -- things are getting interesting.
Dan.
On 10 February 2016 at 09:10, Wyatt Zacharias <wyatt@magitech.ca> wrote:
If anyone would like to download the slides from last nights meetings they are available in pptx and pdf formats at the links below.
http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pdf http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pptx
-- Wyatt Zacharias
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
I have a customer who needs some parts fixed. She bought a pair of used tanning beds. They don't work. Fixing that isn't what I do, but this customer actually pays. One of the employees brought a circuit board with an RJ12 jack. The jack was yanked out. I tried to straighten, but couldn't. Tried to desolder to losen it, but then the jack came apart. I need a new jack. This is a phone jack. RJ11, RJ12, and RJ14 all use the same plastic. RJ11 = 6P2C (6 pole, 2 contacts) RJ12 = 6P6C RJ14 = 6P4C The cables all have 4 wire, but the jack has 6 solder points. It has 2 plastic posts, and the wires go through holes in the circuit board. I first looked at Active Electronics website, but the only ones they have use punchdown connections. Where would I get one that solders? Rob Dyck
Digikey should have a connector that meets your needs, but you'll probably have to take some measurements and then check the data sheet of the one you plan to buy to make sure it'll match your holes properly. Make sure to go to the Canadian site: digikey.ca. Shipping is flat rate $8, no other duty of fees. -- Wyatt Zacharias (mobile) On 19 Feb 2016 8:35 p.m., "Robert Dyck" <rbdyck2@shaw.ca> wrote:
I have a customer who needs some parts fixed. She bought a pair of used tanning beds. They don't work. Fixing that isn't what I do, but this customer actually pays. One of the employees brought a circuit board with an RJ12 jack. The jack was yanked out. I tried to straighten, but couldn't. Tried to desolder to losen it, but then the jack came apart. I need a new jack.
This is a phone jack. RJ11, RJ12, and RJ14 all use the same plastic. RJ11 = 6P2C (6 pole, 2 contacts) RJ12 = 6P6C RJ14 = 6P4C
The cables all have 4 wire, but the jack has 6 solder points. It has 2 plastic posts, and the wires go through holes in the circuit board.
I first looked at Active Electronics website, but the only ones they have use punchdown connections. Where would I get one that solders?
Rob Dyck
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
If you want one quickly / without going through the digikey, mouser catalogs or eBay, you can probably find a matching jack on an old phone-connection device since you only need 4 wires from what I understand. I can check if I still have old PCI modems around that I could give you. -----Original Message----- From: "Robert Dyck" <rbdyck2@shaw.ca> Sender: roundtable-bounces@muug.mb.ca Date: Fri, 19 Feb 2016 20:33:14 To: 'Continuation of Round Table discussion'<roundtable@muug.mb.ca> Reply-To: Continuation of Round Table discussion <roundtable@muug.mb.ca> Subject: [RndTbl] RJ12 jack I have a customer who needs some parts fixed. She bought a pair of used tanning beds. They don't work. Fixing that isn't what I do, but this customer actually pays. One of the employees brought a circuit board with an RJ12 jack. The jack was yanked out. I tried to straighten, but couldn't. Tried to desolder to losen it, but then the jack came apart. I need a new jack. This is a phone jack. RJ11, RJ12, and RJ14 all use the same plastic. RJ11 = 6P2C (6 pole, 2 contacts) RJ12 = 6P6C RJ14 = 6P4C The cables all have 4 wire, but the jack has 6 solder points. It has 2 plastic posts, and the wires go through holes in the circuit board. I first looked at Active Electronics website, but the only ones they have use punchdown connections. Where would I get one that solders? Rob Dyck _______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
FYI (I'm not sure if this is a correction of your understanding): RJ11 = 6P2C (6 pole, 2 contacts) - for 1 phone line RJ12 = 6P6C - yes, but not for normal telephony re multiple phone lines RJ14 = 6P4C - for 2 phone lines RJ25 = 6P6C - for 3 phone lines Hartmut W Sager - Tel +1-204-339-8331, +1-204-515-1701, +1-204-515-1700, +1-810-471-4600, +1-909-361-6005 On 19 February 2016 at 20:33, Robert Dyck <rbdyck2@shaw.ca> wrote:
I have a customer who needs some parts fixed. She bought a pair of used tanning beds. They don't work. Fixing that isn't what I do, but this customer actually pays. One of the employees brought a circuit board with an RJ12 jack. The jack was yanked out. I tried to straighten, but couldn't. Tried to desolder to losen it, but then the jack came apart. I need a new jack.
This is a phone jack. RJ11, RJ12, and RJ14 all use the same plastic. RJ11 = 6P2C (6 pole, 2 contacts) RJ12 = 6P6C RJ14 = 6P4C
The cables all have 4 wire, but the jack has 6 solder points. It has 2 plastic posts, and the wires go through holes in the circuit board.
I first looked at Active Electronics website, but the only ones they have use punchdown connections. Where would I get one that solders?
Rob Dyck
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
---Hartmut W Sager wrote:
FYI (I'm not sure if this is a correction of your understanding):
The application is not phone lines, so data assignment is irrelevant. RJ12 and RJ25 are both 6P6C, which is all that matters. By the way, the tanning bed uses cables with RJ10 at one end, RJ14 the other. RJ10 is sold in stores as "handset" jacks. They're smaller, 4P4C. The fact the cables have dissimilar ends means the manufacturer tried to force customers to buy cables from them, at an over inflated price. I can't find RJ10 plug ends anywhere in Winnipeg, but that's Ok. Just by a "handset" cable with RJ10 on both ends, cut off one and crimp on RJ14. A normal telephone jack crimping tool can apply RJ11 or RJ14 plug ends. Although for some reason only has 4 blades, not 6, so won't work with RJ12 or RJ25. But customer got impatient, took the circuit board back. Said he'll order a new board. He said the manufacturer charges hundreds of dollars. His impatience will cost him. Oh well. Rob Dyck
The better crimping tools, like my heavy-duty all-metal crimper, have 6 blades, whereas the several Radio Shack plastic tools I have all have 4 blades (but are otherwise remarkably good). Your impatient customer is very unusual for Winnipeg, where customers will typically go to great lengths and detriment to save a buck. Hartmut W Sager - Tel +1-204-339-8331, +1-204-515-1701, +1-204-515-1700, +1-810-471-4600, +1-909-361-6005 On 22 February 2016 at 22:19, Robert Dyck <rbdyck2@shaw.ca> wrote:
---Hartmut W Sager wrote:
FYI (I'm not sure if this is a correction of your understanding):
The application is not phone lines, so data assignment is irrelevant. RJ12 and RJ25 are both 6P6C, which is all that matters.
By the way, the tanning bed uses cables with RJ10 at one end, RJ14 the other. RJ10 is sold in stores as "handset" jacks. They're smaller, 4P4C. The fact the cables have dissimilar ends means the manufacturer tried to force customers to buy cables from them, at an over inflated price. I can't find RJ10 plug ends anywhere in Winnipeg, but that's Ok. Just by a "handset" cable with RJ10 on both ends, cut off one and crimp on RJ14. A normal telephone jack crimping tool can apply RJ11 or RJ14 plug ends. Although for some reason only has 4 blades, not 6, so won't work with RJ12 or RJ25.
But customer got impatient, took the circuit board back. Said he'll order a new board. He said the manufacturer charges hundreds of dollars. His impatience will cost him. Oh well.
Rob Dyck
_______________________________________________ Roundtable mailing list Roundtable@muug.mb.ca http://www.muug.mb.ca/mailman/listinfo/roundtable
---Hartmut W Sager wrote:
Your impatient customer is very unusual for Winnipeg, where customers will typically go to great lengths and detriment to save a buck.
They've been struggling with a pair of used tanning beds for a couple weeks. They called me, rather than an electrician because I'm cheap. Turned out neither bed worked. They had to scavenge parts from one to get the other to go. I was first called in to fix their shop computer, but as soon as I got there they asked me to fix the beds. First problem was someone had cut the DSL line at telephone punch-down block. One of her employees tried to re-wire it, but got it wrong. I was able to identify which conducters were the phone line, and get it re-wired. Was also able to read the schematic for the beds, found they hadn't connected the data/control line from the power box in the base to the lid/top. Did verify they had 240-volt power to the wired in correctly. Was scary working with open high voltage circuits. I cut the power and the electrical panel, connected a volt meter, then turned the power on without touching the volt meter. I won't stick my hand into a live circuit at 240-volts. The owner is a slum landlord. A repeat customer, she gets me to fix computers for her extended family, and tennants. She likes my work, thought I could fix anything. Well, this took too long. And she wanted one bed working for her paying customer. She shit on her employee, who got impatient with me. Shit rolled down hill. So no, not really unusual for Winnipeg. In fact this particular crew are a foul mouth lot. I could get some bad habits. One thing that particularly bugged me was this one employee tried to criticise me for drinking at home, in the evening, off hours. I saw this same guy drinking while on the job, and most importantly drinking *while* driving. With a beer king can tucked in his seat belt. Is it too much to ask customers to not call me 10:30 at night? Rob Dyck
Thanks, Wyatt, for posting those. I've updated the meeting description on the web site to link to the files. On 10/02/2016 10:10 AM, Wyatt Zacharias wrote:
If anyone would like to download the slides from last nights meetings they are available in pptx and pdf formats at the links below.
http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pdf http://muug.mb.ca/meetings/WirelessTheoryandRegulations.pptx
-- Manitoba UNIX User Group E-mail: <gedetil@muug.mb.ca> c/o Gilbert E. Detillieux Web: http://www.muug.mb.ca/ University of Manitoba Phone: (204)474-8161 Winnipeg MB CANADA R3T 2N2 Fax: (204)474-7609
participants (6)
-
cstanners＠gmail.com -
Dan Keizer -
Gilbert Detillieux -
Hartmut W Sager -
Robert Dyck -
Wyatt Zacharias