Showing posts with label vhf. Show all posts
Showing posts with label vhf. Show all posts

Tuesday, October 24, 2017

It's FOX HUNTING Season !!

Get your horses ready and best red coat... SEKARC is having a FoxHunt this Saturday October 30th. The plan is to meet at Hardee's for breakfast and coffee. Visit, eat, drink and have a good conversation over a biscuit and coffee!

Then we will discuss the plans for the hunt. Much of this will be open for discussion so plan on being a part of it! At 9am let's gather at Hardee's, then around 10, after the plans are laid down, a couple of us will go to Lincoln Park and plant the foxes! Then about 10:30. the rest will leave and head to the park. Meeting in one place like maybe the parking lot in front of the band dome? I am not sure if there are other events in the park so we will be flexible on that. For last minute details and instructions monitor the .94 repeater for traffic regarding the hunt.

Wednesday, January 13, 2016

Easy 2 meter SSB Loop Antenna


Here is a great design and build instructions for a nice 2 meter SSB loop antenna. 2 Meter Halo Antenna by Mike Fedler N6TWW has the detailed instructions on his site. Here are some initial notes from the link...

Project Background & Goals  *CLICK HERE FOR FULL LINK*

Wednesday, March 25, 2015

Great Copper J-Pole Calculator

I found this great little site for calculating the materials and measurements for making a great copper j-pole antenna! If you were looking at making one of these classics, this will help you out !

LINK HERE
J-Pole Antenna Calculator




The Frequency you entered: 146.94 MHz

Measurements(95% Velocity Factor for Copper Pipe):
A: 1.454 meters or 4 Feet 9.24 inches
B: 0.485 meters or 1 Feet 7.092 inches
C: 0.049 meters or 0 Feet 1.932 inches*
D: 0.046 meters or 0 Feet 1.812 inches §

* Adjust up or down to get the best SWR.
§ Measurement not critical.


Sunday, March 31, 2013

Great Kickoff Meeting for SEKARC !!

The first meeting of the Southeast Kansas Amateur Radio Club was a success! Along with several hams from Pittsburg, we also had David KDØFBH from Iola and Larry NØMST from Joplin. David brought us information on the American Legion Amateur Radio Club which I will be posting about next week on this site. It was great information about another way to practice amateur radio. Larry brought a couple of his excellent SSB VHF antennas that he creates.

The coffee was great and we spent too much time talking to really eat much, but the manager came by and welcomed us, passed out coupons and mentioned the 65 cent coffee if you BYOC. I must have heard incorrectly on the 35 cents offer I originally posted but 65 is still a reasonable price! If we grow much larger we will have to expand out of the corner!

There were a total of 11 hams and 2 XYL's for a total of 13 people, not bad for the first meeting on a holiday weekend! We had 2 door prizes and the proud winners of the SEKARC custom coffee mugs, which went to Tom N2UHC and Bill WBØLXZ. We hope to have at least one door prize for every breakfast meeting so make plans to attend every month! Now Bill and Tom will be ready for the BYOC coffee special next month.
If you have ideas for prizes or would like to donate a prize just send us an email with your thoughts! Gag gifts and homebrews are fully acceptable as gifts for this group so let me know if you have ideas!

We discussed the formality of the group vs structured, due paying hassles and formal meeting agenda's. We opted for the casual, informal FREE version of the SEKARC and we will continue the current format at Hardee's and on the last Saturday of each month so make your plans each month. We will be having activities beyond the Saturday morning get together, such as Field Day, foxhunts, Special Event stations ( PSU Homecoming was one possibility for that one ).

The Builders group will continue on the 1st and 3rd Thursday evenings and if you would like more information please email us at sekarc.net@gmail.com and we will put you in contact with the host Joe, WØMQY. Tom N2UHC, one of the builders group brought in one of his projects, a QRP CW transceiver which you can see being held by Justin KDØCUR in the photo above. WBØLXZ also brought in a circuit board and schematics for a QRP 80 meter transmitter that he is considering as a group build project for those interested. It will transmit with a 3.6864MHz crystal, 4 transistors, and a couple dozen little tiny small other parts + one 23-turn toroidal coil that must be wound. The toroid is part of the pi-network used as a low-pass filter. When you next see it, it should all be on one circuit board less than 3 inches square. To use it as a transmitter, you need a 12v source, a key, and a fair 80m antenna.

Larry NØMST, one of the local VHF big dogs, brought in his fantastic bigwheel cloverleaf VHF horizontal SSB antennas, and a smaller square version for mobile applications.
I have one of those on my shopping list this spring and I hope to be able to expand my SSB VHF reach with one of those beauties! Both of these antennas were built to last and work well. I've learned a few things from Larry even before today and one is them is, the higher the frequency the more important GOOD coax is. In fact he recommends nothing less than LMR 400 for VHF/UHF setups. And last I heard, he had made contacts in something like 46 of the lower 48 states on SSB VHF so he is doing something right and of course he will tell you that height is a huge factor in your ability for long distance VHF work of any mode.

Well our first meeting was a huge success and I hope you all remember to keep us on your calendar for the last Saturday of every month but we will be having other activities in between those days so keep tuned in to the website here for new events and information. Thank you to all that were there today, I think I can speak for all of us when I say it was a great time to meet people and develop some friendships and fellowship that goes well beyond the radio waves. Joe WØMQY placed a request for one of the custom shirts like I was wearing from the CafePress/SEKARC shop. Here is a link to the shop and if you would like a custom item created please shoot us an email and I will mock something up for you.
I have a few generic club items posted and I can add any name or call to just about anything. I do not apply a markup so there is no profit for me in this, just want to spread the word on SEKARC and the art of radio!

Also in attendance were my XYL Loren KDØRTX, who is excited about learning and using CW and building kits, Steve WDØDTS and Wayne ACØOG, it's very helpful to have so many experts in electrical in the group. Wayne is an active member in the Builders Group and Steve is an experienced ham, just kind of cranking things up again. We missed some of the regulars on the Wed night nets, but some were traveling for the Easter holiday and the rain may have kept others in. We hope for a bigger and even better turn out next month. And remember, after the April meeting we are going to move to the park and setup some field work and make some contacts, some QRP and some not so QRP!!

 73's and BTU, this is Kilo Delta Zero Sierra Echo Golf.



 

Tuesday, March 26, 2013

Southwest MO Linked Repeaters !

See below, new information regarding our Southwest Missouri neighbors and their linked repeater system! A special thanks to James Adkins, KB0NHX for this information. I am sure we all frequently travel to and communicate with this area so I thought the group here might find this information useful.

James writes...

Last month, the Granby 145.390 repeater, PL 91.5 Hz, went on-line. As some of you have already found out, it is linked to the 147.015+, PL 162.2 Hz in Springfield 100% of the time via RF. These repeaters are two integral parts of the Southwest Missouri Linked Repeater System (SMLRS-MAP posted below).

The system is open for any amateur to use, and also includes the 442.150+ repeater, PL 162.2 Hz in Crane and we will soon be adding the 145.450- repeater, PL 91.5 Hz in Nevada in a couple of weeks. ALL repeaters are in hardened shelters and have UPS and Generator emergency backup power which can run the sites for greater than 2 weeks without re-fueling.

After the tornado struck Joplin, and there was no reliable means of communications with Springfield, several groups of amateurs teamed up to pool resources and knowledge to place the system on the air. The Nixa Amateur Radio Club along with the Southwest Amateur Radio Group in Neosho, the Mulebarn amateur radio club, and agencies such as Greene County EMA and Vernon County EMA, and the City of Crane all helped make this system a reality. Having so many groups and organizations involved for a common goal has strengthened ties among the groups and helped build a robust system that could not have been built by any one person or group.

Events such as the MS-150 and the Tour de Bass bicycle rides are already slated to use the system in 2013, and some ARES groups are already discussing the use of the system for severe weather spotting throughout Region D in Southwest Missouri.

If you want to access on-line training documents, view computer generated coverage plots of mobile radio coverage, see pictures of the repeaters, learn all the technical details, or anything else about the SMLRS system visit the website www.smlrs.info.

Please feel free to pass along this e-mail and all the information included to other amateurs and groups in the area that would benefit or enjoy using the system.

73,
--
James Adkins, KB0NHX



Wednesday, February 27, 2013

First SEKARC Net A Success !!

Our first weekly net was a success! We had a total of 7 check ins. Locations varied from Pittsburg, Columbus to St. Paul and even Seneca, MO! Thanks to everyone that participated. We will look for you all again and MORE next week.

We discussed possible meeting days and several items were mentioned that will make excellent topics for the club meetings. Things like SSB on VHF/UHF, SDR ( software defined radio ), foxhunts and kit building.


SEK ARC Weekly Net Log

CALL SIGN NAME LOCATION
KD0SEG Jeff Pittsburg KS
KD0RTX Loren Pittsburg KS
W0MQY Joe Pittsburg KS
KD0SSD Leon Pittsburg KS
N0IGZ Frank Columbus KS
KD0FRL Casey Seneca MO
N2UHC Tom St. Paul KS

One of the topics was the Hamfest in Claremore OK in march....  you can find more info at this link. And see the previous posts for additional information !