• 19Dec
    Categories: DMR, Repeaters Comments Off on Boise, Idaho DMR/MotoTRBO Amateur Repeater Codeplugs!

    Boise’s DMR repeater has been busy with chatter the last few days since it came back online. Thanks again to Al, WA7GSK, Fred KE7FIX and the group at Gem State Communications for bringing it back on to the DMR MARC network!

    Connect Systems has brought down the price on the MD380 UHF handheld clear down to $110! Incredible value to get on digital voice and talk to the world. As I write this post, I’m QSOing with a station in Nova Scotia and New Zealand 🙂 You can buy an MD380 here.

    Want to know more about DMR aka MotoTRBO in Idaho? Here are a couple short articles and the DMR Primer:

    Amateur’s Guide to DMR

    DMR in the UK

    DMR at the Windsor, Canada Field Day

    Motorola Amateur Radio Club (DMR-MARC)

    I’ve built sample codeplugs for the following radios:

    Motorola XPR4550 UHF Mobile
    Motorola XPR6550 UHF Handheld
    Connect Systems CS750 UHF Handheld
    TYT/Tytera MD380 UHF Handheld

    All that needs changed is the subscriber ID to match the one you have requested from DMR-MARC here:
    Request your radio subscriber ID from DMR MARC

    The radio IDs have been defaulted to “1” in each codeplug and will need to be changed prior to accessing the network.

    Right click to save as:
    Connect Systems CS750 Boise Sample Codeplug (entire DMR-MARC contacts database)
    Tytera/TYT MD380 Boise Sample Codeplug
    Motorola XPR4550 Boise Sample Codeplug 403-470 Split
    Motorola XPR6550 Boise Sample Codeplug 450-512 Split hex edited down to 430 MHz (write to radio, reading from radio will return to original 450-512 bandsplit)

    Software used:
    MotoTRBO CPS version 10.7 with wideband patch from the gents at Communications.support (patch here)
    Connect Systems CPS HAM2000 version R4.00.13
    Tytera MD_380 Radio Programming Software V1.30.0

    Watch the C-Bridge live here!

    Interested in more info? Email me directly at k6lor AT vwreact DOT org or catch me on the 444.075+ DMR repeater on Local Color Code 1 Timeslot 2 Talkgroup 2 🙂 I’m also typically monitoring the 146.780-/444.725+ repeater network.

  • 31Aug
    Categories: DMR, Information, Repeaters Comments Off on Project Preparedness 2014


    What is Project Preparedness 2014? Valleywide REACT is taking on the task of deploying Digital Mobile Radio, also known as DMR or MotoTRBO, repeaters throughout our impact area in Southwest Idaho and Eastern Oregon to provide for:
    – Resilient emergency communications
    – Efficient use of spectrum
    – Dedicated public service radio use
    – Improve the use of Amateur (Ham) Radio in community and government emergency preparedness plans

    Project Preparedness 2014 is in the funding stage at this point with a bench launch planned for Winter 2014. The network will consist of 8 DMR repeaters covering from Twin Falls, Idaho to Vale, Oregon and extending to New Meadows south to Jordan Valley. This all digital two way radio network is open to anyone with an FCC issued Amateur Radio license, a DMR handheld or mobile radio and a desire to help their community.

    DMR is a natural migration from traditional analog wideband communications and allows for greater spectrum use with limited infrastructure. DMR is vendor neutral – no one is locked in to only using one particular brand of radio like Icom’s DSTAR product and has a GPS location mapping element built in to the ETSI international standard.

    If you are interested in more information about Valleywide REACT’s DMR plans or to get involved in DMR in your community, feel free to email AJ Grantham, K6LOR at his callsign at ARRL dot net.

  • 15Feb
    Categories: 147.080+ VHF, Repeaters Comments Off on 10V Regulator Card Modified

    Looks like the 10V Regulator Card in the VHF repeater was swapped while on the site last weekend.

    Modifications necessary to make a 10V Regulator Card work for a repeater full duplex station.

    Modifications necessary to make a 10V Regulator Card work for a repeater full duplex station.

    As a result, I had to modify it to match up with the

    “repeater station” circuit needed to prevent the repeater from “repeating” on its own without an external controller (like it was this morning).

    http://www.pionsimon.com/repeater_setup.htm

    Also found sucked out (improperly installed) PL-259 fittings on 4 of the 8 connectors on the interconnection cables.

    I also had distorted audio when connected to the controller and when connected through the GE stock repeater card. The NHRC7 controller was fed off of the discriminator audio which would have come directly off of the system monitoring board. Moving the RX Audio over to the SPEAKER HI terminal on the back of the system control shelf resolved the audio issues.

    There are still some hum issues on received audio that do not show up on controller generated audio (such as after COR opens during hang time, courtesy tone and CWID). Monitoring from a scanner with tone decode, it appears the GE board, which decodes the 100.0 hz PL tone, does not seem to filter out the subaudible tone. Subsequently, the hum on the transmitted audio appears to possibly be retransmitted CTCSS tones from subscriber radios keying in to the receiver.

    This audio issue was not previously apparent utilizing the commercial CSI TP3200 controller as it has high pass filtering in place (and regenerates true tones as programmed or none at all).CSI TP3200 Tone Panel to NHRC-7 Controller

    The 9914 Nm-Nm jumper appears to have been the only good coax jumper amongst the lot taken with the repeater off of the mountain. I cut it in half and soldered on new PL259 connectors. The output ports for the RX and TX on the Mastr 2 are SO239 (UHF) connectors. The input ports to the duplexer are Nf connectors. By putting PL259s on the radio site and using the existing Nm connectors on the duplexer side, I’ve been able to remove 3 extra adaptors previously in use.

    Also looked in to a few options for continuing to use the CSI TP3200 Community Tone Panel for tone encode and decode.

  • 15Feb
    Categories: 147.080+ VHF, Repeaters Comments Off on 147.080+ Repeater Realigned

    On 2/7/09, Russ, N7SMA & AJ, K6LOR met up to realign the 147.080+ Mastr II VHF repeater that was previously up on Wilderness Ridge. We are happy to report that, after some interesting “tail chasing”, the VHF repeater now sits at a very reasonable .18 uV sensitivity as measured by a calibrated HP spectrum analyzer and is spot on frequency, plus or minus a few hertz, with 26 watts out at the P/A. The remaining desense issues are in three distinct locations that must be resolved:

    • Repeater to Duplexer Interconnection Cables
      • Receiver to Duplexer
      • Transmitter to Isolator
      • Isolator to Duplexer
    • Duplexer to Antenna Cable
    • Antenna

    In order to trace down the desense, the interconnection cables are the first to be replaced as they’re already a mismatch of cabling:

    RG9

    RG214

    Belden 9914

    Belden 9913

    The overall consensus of the repeater building community is that anything other than Heliax-type cable will likely result in some form of leakage, contributing to desense.