Repeater Mapping Online – Hypothetical Radio Coverage Maps

With all the work on the K9IU repeaters, a few of us got curious about coverage and some what-if’s with respect to antenna gain, height above terrain, power output and more.  Check out this cool program for repeater mapping – free and web based:

Here is a sample of the coverage of the K9IU VHF repeater according to the computer.  Coverage is actually a bit better than what the computer depicts.   Interesting none the less.

As a reminder, K9IU is hosting analog and digital repeaters which provide traditional analog VHF FM,  as well as C4FM System Fusion (VHF),  D-Star Digital (VHF and UHF) and DMR (UHF) repeaters.

Please consider to join K9IU – dues are just $20/year and all funds go to expand the club’s radio room / ham shack equipment and repeater system.  We hope to raise enough funds to keep improving our repeaters and do some experimenting, adding back an IRLP/Echolink node and cross linking the digital – analog systems.


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D-Star VHF K9IU Repeater back on air – now @ 146.940 Mhz

We completed maintenance today to get the K9IU VHF D-Star Repeater back online.     It’s currently up and running in local mode until the node controller (a raspberry pi) is configured.

Note the D-Star list is in need of update, for Bloomington we have the 146.940/(146.340 input) VHF repeater and the 444.900/(449.900 input) D-STAR on UHF.

IMPORTANT: Don’t forget to change your D-star repeater config in your radio accordingly, the list from Icom/D-Star Info is incorrect and outdated.

The UHF D-Star repeater is also on air but in local mode for now.   Also awaiting the raspberry Pi node configuration.

Reflector 024 should be back soon !  The trick?  A 20 year old windows xp notebook –  driver works !

Thanks to Matt KB9YOJ  and Corey KB9JHU for help getting us back on air !

73 DE  K9IU




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Indiana Hoosier Safe-T P25 – Live ! Streaming Link Online

Interested in monitoring the P25 Public Service SAFE-T systems ?    Click here for Monroe and Brown County towers at Bloomington, Hindustan, Knights Ridge, Nashville, and Bedford;  The feed covers Indiana State Police, DNR southern region,  Monroe and Brown County PD/Fire/EMS,  Bloomington, Nashville City PD, IU PD,  Brown and Monroe County Fire and EMS dispatch and a few other miscellaneous services.   Tactical channels are not included (to protect those who protect us) :

Also, as amateur radio operators, we are allowed to use public service monitoring equipment while stationary, mobile, and foot-portable. Here is the link the applicable Indiana State law regulating use of said equipment.

It pays to have an amateur radio license for lots of reasons, this being one of them!    See IC IC 35-44.1-2-7 below.

IC 35-44.1-2-7 Unlawful use of a police radio

Sec. 7. (a) A person who knowingly or intentionally:

(1) possesses a police radio;

(2) transmits over a frequency assigned for police emergency purposes; or

(3) possesses or uses a police radio:

(A) while committing a crime;

(B) to further the commission of a crime; or

(C) to avoid detection by a law enforcement agency;

commits unlawful use of a police radio, a Class B misdemeanor.

(b) Subsection (a)(1) and (a)(2) do not apply to:

(1) a governmental entity;

(2) a regularly employed law enforcement officer;

(3) a common carrier of persons for hire whose vehicles are used in emergency service;

(4) a public service or utility company whose vehicles are used in emergency service;

(5) a person who has written permission from the chief executive officer of a law enforcement agency to possess a police radio;

(6) a person who holds an amateur radio license issued by the Federal Communications Commission if the person is not transmitting over a frequency assigned for police emergency purposes;

(7) a person who uses a police radio only in the person’s dwelling or place of business;

(8) a person:

(A) who is regularly engaged in newsgathering activities;

(B) who is employed by a newspaper qualified to receive legal advertisements under IC 5-3-1, a wire service, or a licensed commercial or public radio or television station; and

(C) whose name is furnished by the person’s employer to the chief executive officer of a law enforcement agency in the county in which the employer’s principal office is located;

(9) a person engaged in the business of manufacturing or selling police radios; or

(10) a person who possesses or uses a police radio during the normal course of the person’s lawful business.

(c) As used in this section, “police radio” means a radio that is capable of sending or receiving signals transmitted on frequencies assigned by the Federal Communications Commission for police emergency purposes and that:

(1) can be installed, maintained, or operated in a vehicle; or

(2) can be operated while it is being carried by an individual.

The term does not include a radio designed for use only in a dwelling.


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K9IU applies for ARRL school club grant

We have completed the application and approved to move forward at last night’s meeting, to apply for an ARRL equipment  grant!    As a school club, we hope the ARRL considers our request given the importance in mentoring new hams and being a service to our community and access point for University students who are interested in technology but are often living in dorms or apartments that come with antenna and station restrictions.

The grant request is to purchase a more functional digital HF transceiver and a small solid state amplifier.  We will also be updating our license manual library to accommodate technicians, generals, and extra class examinations.

It’s the first ARRL grant request that we have ever  made based on old club records.

We have, through our own hard work and fund raising plus alumni donations and club dues accomplished the following in the past 2 years:

New yaesu fusion vhf analog and C4FM repeater.  New Sinclair vhf repeater 4-bay antenna.  Antenna and repeater relocation to the Indiana Stadium press box with new Andrews hardline run and grounding.

New shack HF Mosley Pro67 HF yagi Antenna.  New Long wire with icom AH4 remote tuner.     New coaxial cable runs.

A New Telrex T2X antenna rotor is also going to be procured and installed soon.

We also Host a Hoosier DMR mototrbo repeater with the club giving the owner free tower space and free 24×7 Internet which  enable the vast Hoosier bandmeister DMR network access to our local hams/community.

We are  reconfiguring both  D-star repeaters sponsored by K9IU to allow students to connect globally to other D-star machines.

Digital is the new direction and we are active on digital modes   PSK, FT, and JT

So .. lots of work done and more to come    Fingers crossed that the ARRL comes through to help out active club become even more radio-active !



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Long wire launch with spud gun

Nothing beats a little aqua net to launch an antenna pilot line.   Here you can just see the insulator hanging over the edge of the building  look for the thin black antenna wire    Sure hope the DX engineering antenna wire isn’t just hype  !     Hope it’s strong too!

We installed the 160 foot long wire antenna today.  It will be tuned with an Icom AH-4 auto tuner and fed against the grounded  tower.       Need to complete the install by wiring up the tuner to the shack and then a few connections to the tuner.

Top band here we come !!    Just in time for the quiet low band season     Here  is a video of K7JOE and N9VKU launching the pilot line which then hauled the antenna wire over to the air handling unit on the roof of IMU memorial hall.       A convenient trap door made install a snap.  The key was a good shot with the spud gun.   Took us 3 tries due to a very windy day.

antenna launch



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