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CARP C4FM Fusion Repeater Online

November 11, 2015 – The CARP 2-meter repeater located at the Mile High repeater site has been upgraded to a Yaesu Fusion repeater. This expands the CARP repeater system by adding the Yaesu C4FM digital capability to support the growing user base of area owners of C4FM radios.

The 147.675 Mhz K6ARP repeater is in AMS (Auto Mode Select) which allows both C4FM Digital and Analog FM users to access the system. The AMS feature automatically detects whether the incoming signal is C4FM for Analog FM and in turns re-transmits out in the corresponding mode.

Wires-X and internet access upgrade is planned for the future.

Analog users can still use the repeater as normal: 147.675 – 141.3.

T-Hunt Results – July 26, 2014

K6ARP.org
August 4, 2014

Central Valley Transmitter Hunters – Local T-Hunt on July 26th

On Saturday, July 26th, the CVTHunters once again commenced a local transmitter-hunt that proved to be a good challenge for all who participated.   The hunt started at about 10:10AM and the hidden Fox was planted by both Ken Holden and Ron Hunt.  As usual for Ron, we decided against a QRP hunt and instead pulled out the big guns.  The hidden transmitter site was setup at the very north (dead end) of Crawford Avenue, which is north off of Highway 180.  Yes, this location was on the back side of Jesse Morrow Mountain at the base of the mountain.  With this rather large mountain blocking the signal path directly to the valley, the signal proved to be a bit tricky to follow.  And with a transmitter power averaging 100 watts, there were signal reflections everywhere.  Knowing that there was to be reflections, we decided to not use the yagi antenna we usually use and instead just used a vertical collinear mounted on a tripod.  Here is that it looked like.

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Continue reading T-Hunt Results – July 26, 2014

Wireless Routers Needed

Linksys WRT54er

The Fresno County EmComm Group is provisioning a High Speed Multi-Media Mesh Network (HSMM-Mesh) to support our disaster and public service response capabilities. To accomplish this we will re-purpose 2.4GHz Linksys/Cisco Routers by reflashing the on- board chip set. The firmware we have for this is designed around a single chipset used in several models and versions of the routers. Some very early models used 5V power and we are looking to standardize on more recent models that operate at 12VDC. We will be operating the units of standard station power supply or battery and the wall mount power supply will not be needed.

The majority of users have likely upgraded their routers and may have a compatible unit just shitting around gathering dust.

To be compatible, your router should look like the one shown below and match the model, version, S/N Prefix info listed in the table below. If you have longer (higher gain) antennas you no longer use, those would be also much appreciated.

Other platforms may be compatible but the Linksys/Cisco WRT54 series represents the largest installed base, are widely available and are supported with a significant knowledge base.

We hope to field a system with 8 nodes and 2 spare units. Should you have one the listed routers and would like to donate it the Fresno EmComm Group, either bring it to a future meeting or contact Lew Roberts – KI6YWX – 559.284.6380 – ki6ywx@arrl.net.

Additional Information:

For a list of WRT54 Models see PDF.

For more information on HSMM-Mesh for Amateur Radio visit www.broadband- hamnet.org/ or view the short video on YouTube – http://youtu.be/hUeW2ju-RZk.

Transmitter Hunt: Saturday March 8, 2014

K6ARP.org

CARP Transmitter Hunt Saturday March 8, 2014

Come on out to the T-Hunt, we always have a lot of fun.  Remember the more you hunt, the better you will get!

Hunt Frequency will be 146.565 MHz.

This hunt will be starting at Letterman Park in Clovis and will start at 10:00 am so arrive early to sign in.

John K6MI will be the fox for the hunt. Current info from the fox is that he will be somewhere in Fresno County. More details will be given as the date of the hunt approaches and at the start of the hunt.

Come on out and compete for your equipment classification. Even if you don’t have any equipment, come out and one of the hunters should have a seat for you to ride in the hunt!

For more information email info@k6arp.org or call 559-492-7675.

Transmitter Hunt: Saturday January 4, 2014

K6ARP.org

CARP Transmitter Hunt Saturday January 4, 2014

Come on out to the T-Hunt, we always have a lot of fun.  Remember the more you hunt, the better you will get!

Hunt Frequency will be 146.565 MHz.

This hunt will be starting at Letterman Park in Clovis and will start at 10:00 am so arrive early to sign in.

Matt KG6YLJ and Greg KG6YZN will be the fox for this hunt. Hunt radius is estimated at between 5 and 10 miles. More details will be given at the start of the hunt.

Come on out and compete for your equipment classification. Even if you dont have any equipment, come out and one of the hunters should have a seat for you to ride in the hunt!

For more information email info@k6arp.org or call 559-492-7675.

T-Hunt Report – November 2, 2013

K6ARP.org
by: Ron Hunt N6MTS
May 2, 2013

Central Valley T-Hunters Report for November 2, 2013

Hidden Transmitter Antenna Overlooking Hensley Lake

Once again, the CV T-Hunters met for another challenging event. We started from the Hwy41 & HWY 145 park-N-Ride lot on Saturday morning at about 10AM. We had 6 teams hunting and we were searching for two transmitters.

Ron, N6MTS, was the Fox and hid the transmitters on the east side of Hensley Lake. But that’s where the fun started. Normally the group hunts a low powered QRP-type transmitters that we can barely hear it from the starting point. But as Ron says, “life is too short for QRP”. So in his usual style, the main transmitter was running a bit of power, about 140 watts of it. AND all this power was pumped into an 11-element yagi to “beam’ the signal to the west side of the like.

Hidden Transmitter and Power setup

The west side boat ramp was so lit-up with RF that it could have glowed in the dark, and it was literally reflecting RF from every rock. Furthermore, the antenna was set down deep in a cove on the east side of the lake, to insure that it wouldn’t be heard from anywhere other than the west side of the lake (the reflection side). So according to plan, “all” the hunters sniffed around to the west side of the lake before realizing they had been lead astray. Once they figured that out, it was an easy trip around the lake to the east side to actually locate the real source of all the RF, and with 140 watts, we had RF everywhere.

Hidden Transmitter Radio

Additionally as you drove down to the picnic area where the main transmitter was located, you passed another low-powered squeaker and that too was the second transmitter that had to be located. It was found to be inside an old salad-dressing bottle and was hidden beneath a big weed next to a culvert. ( I wanted to put it in the culvert, but couldn’t get enough signal out to be easily noticeable. Of course the trick here was that the big transmitter had to be resting between operational cycles to even hear the weaker bug at all.

For this particular hunt, it was announced that the winner of the hunt would be the team who had driven the “least miles”, and the overall time was irrelevant. But to qualify you also had to have physically located both of the transmitters. So the final results were as follows:

  • First place winners: Matt KG6YLJ and Greg KG6YZM with only 24.0 miles driven.
  • Second place: John WJ6Y and Rick W6KKO with 25.0 miles.
  • Third place: John K6MI (running solo) with 27.1 miles (but also the first to finish)
  • Fourth place: Rob AE6GE and Greg KJ6OUI with 27.8 miles
  • Fifth place: Mike KD6LDA (running solo?) with 43.0 miles (but he was moving)
  • Honorable Mention: Duane KI6QEL and Christian with 38 miles (but didn’t find the QRP transmitter).

Then next scheduled T-Hunt will be on January 4th, at 10AM.
Come and join us for some serious fun.