ARRL

WD6EJN

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
ghz frequency loop yagis Feb 9th, 00:53 2 25 1 day, 22 hours ago
Using wi-fi routers ("mesh system" 2012? qst) Oct 3rd 2015, 19:07 1 264 on 3/10/15
question about wi-fi routers Aug 15th 2015, 23:28 4 503 on 27/8/15
ghz loop yagi calculator Aug 15th 2015, 23:15 2 243 on 16/8/15
Local Eoc (in case the web goes down) Round The Block Net Need Dirt Cheap Wireless Microphones! Jun 16th 2015, 21:34 5 384 on 6/7/15
Resistors as Chokes Jun 9th 2015, 18:01 3 355 on 9/6/15
Analog Atomic Wall Clock With Silent Second Hand No Battery May 19th 2015, 19:35 5 643 on 11/6/15
Linked Routers Jan 8th 2015, 00:13 2 442 on 4/3/15
Cross Band Balloon/Kite May 20th 2014, 22:08 1 673 on 10/6/14
mast mounted bi-amp Jun 10th 2013, 23:17 3 920 on 18/6/13

Latest Posts

Topic Author Posted On
ghz frequency loop yagis WD6EJN 2 days, 1 hour ago
Some time ago I built several two meter yagi and quad antennas from yagi and quad calculator sites.
Every parameter was there for me to input such as gain diameter of elements and length of boom etc etc.
Why is it so hard to find a loop yagi (look like key rings) calculator for the bands above 70 cm or so?
Using wi-fi routers ("mesh system" 2012? qst) WD6EJN on 3/10/15
Rather then re-post.....again and again,,, I was hoping that someone would see it again and answer my question.
I do not have any portable internet devices such as every one else, so it might take me a long time to get to a library to see replies to this post,,sorry about this.
I have not gotten around to trying to understand the "Mesh System" which was written up in qst a long time ago but what I am wondering is: can I have tiny digital simplex wireless microphones rather then the full duplex internet video that was used in the system?
And I want to hook all these toghether around the block without the internet.
This would be like one big "conference call" for all to keep in touch especially shut ins.
Many folks cannot afford computers and the internet.
This is especially important during a disaster.
As with the mesh system, can we just use used or surplus Linksys (or whatever) routers? or ham equipment that does the same thing.
apparenty these are just thrown away as there are so many updates to the technology used.
I guess I'll never understand this till I can find the original qst article.
So it looks as if, once everyone participating around the block (I know impossible feat) obtains their ham licenses to operate on 2.4 ghz, we still have to use full duplex systems as in internet.
It would be nice to just find a receiver to just pick up all the microphones around the block then have them all on a down link channel or broadcast on an lpfm (not part15) radio station.
Oh, again, as I mentioned I always have cc&rs and antenna restrictions wherever I have to live.
question about wi-fi routers WD6EJN on 26/8/15
Since I am just receive one (wide digital) channel and don't care about having the full duplex capability of the router.
Can I just have a digital receiver pick up the wireless microphones around the block then discriminate the ifs' for use as voice overs on an lpfm (not part 15) radio station then rather then needing the (what I assume is a full duplex) uplink transmitter of the router?
P.S. I haven't finished many projects in the last ten years or so!! I can dream can't I.
question about wi-fi routers WD6EJN on 15/8/15
Ratherer then re-posting this, I was hoping that someone would see it again and answer my question.
I do not have any portable internet devices such as every one else, so it might take me a long time to get to a library to see replies to this post,,sorry about this.
I am have not gotten around to trying to understand the "Mesh System" which was written up in qst a long time ago but what I am wondering is: can I have digital simplex wireless microphones rather then the video that was used in the system?
And I want to hook all these toghether around the block without the internet.
This would be like one big "conference call" for all to keep in touch especially shut ins.
Many folks cannot afford computers and the internet.
This is especially important during a disaster.
As with the mesh system, can we just use used Linksys routers?
apparenty these are just thrown away as there are so many updates to the technology used.




I don't really know much about routers or computers, but how is it that they are able to have so many users on one Wi-Fi channel?
Does each user have assigned to it another channel? or frequency.
The reason I am curious, I have been wanting to have a neighbor eoc or neighborhood watch using low power transmitters probably wireless microphones that just go around the block.
I am used to hearing more then one ssb signals around a frequency much like a contest or pile up although having to tune each signal to clarify.
I am guessing that more then one digital signal can occupy the same frequency, this would be perfect for my use as in a conference call situation without heterodynes as in am or cb.
ghz loop yagi calculator WD6EJN on 15/8/15
I have lived in apartments and have had antenna restrictions for many years, never getting on low bands with an occasional repeater contact.
I think I could bounce signals off buildings if I could build loop yagis.
I built the 1295 loop yagi as in the arrl handbook but this did not include technical info for other frequencies, you know enter the diameter of element, frequency, gain, etc. I couldn't afford a transceiver so I never found out if it worked.
Although I have built many quad and linear element yagis using quad or yagi calculator on the internet, I have not been able to find a loop yagi calculator for ghz frequencies.

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