Allenspark Repeater



The Allenspark Repeater is the second repeater in the Mountain Emergency Radio Network
Located Northwest of Boulder serving Allenspark and surrounding areas.

ANEN conducts a weekly net on this repeater each Tuesday eveniong at 8:00 PM

Access: Open (This repeater may be enjoyed by all licensed operators)
Status: On-Line (As of Aug 10th)
Mode: 16KOF3E
TX Frequency*: 147.030Mhz
RX Frequency*:
147.630Mhz, with 100Hz(1Z) PL
FCC ID/Trustee: Dave (KI0HG/R)
Technical Guy: Dave (KI0HG)

* Set your radio to receive 147.030Mhz, Positive Offset, and PL of 100.0Hz and you're good to go.
If your radio has the ability to decode CTCSS/PL The PL of 100.0Hz is also transmitted

Repeater Technical Details:
GE Mastr-II
TX Power: 80W
RX Sensitivity: 0.3uV
Controller: PSE-508-2
Duplexer: DB-4062
Antenna: Hustler G7-144

051 how to connect

KI0HG Hooking Things Up!!

041 Repeater on the line

KA0BSA Sending up the Radio


Upgrades to Allenspark Repeater:

After the repeater was installed at AFPD station 1, it worked flawlessly until the floods in September of 2013.  There seemed to be some sort of interference, but it was intermittent and seemed to disappear when the weather dried out.  During the next 3 years, the problem would come and go, but we really couldn’t pin it down to anything in particular.  The system was being desensitized by something in the area that prevented operation unless you were very close and used a lot of power.  It was getting to the point that the repeater was somewhat unusable and we started doing nets on simplex and repeater depending on if you could get in or not.  Finally we had a breakthrough.  In February of 2016, the problem disappeared during a power outage in the Allenspark area that saw the repeater functioning normally, while Station 1 was on the backup generator.  In the next couple of weeks, we were unsuccessful in locating the interference with any certainty.  The next idea was to move it out of town.  Station 5 was somewhat isolated and had recently been completed.  There was a backup generator on site and was available as a new location for the repeater.  In July 2016, we installed a temporary antenna and moved the whole setup over to the new location.  To everyone’s relief, the problem did not follow.  Not only was the repeater functioning perfectly, we also had better reception down into the Raymond / Riverside area.  A few weeks later, CCARC approved the move.

September 2016 - Steve Coles, Bill Ellis, Steve Koenig, Ueli Hauser and Bob McDonald installed antenna rack on the peak of APFD station 5 and permanently mounted the antenna.  Money for the Unistrut rack was provided by ANEN and was made large enough to support a second antenna that AFPD would like to install for better coverage of the area.

June 2017 - Bob McDonald, Steve Coles, Bill Ellis, Dave Sharpe, Jim Clements came together to move the repeater from the floor standing cabinet to a wall mount unit to get the equipment off of the floor and out of the way of fire equipment at the station.

May 2018 - Bob McDonald, Steve Coles and Bill Ellis Finally got the duplexer off of the floor and installed a grounding block and suppressor on the antenna feed line.

The Pics below are of the 2nd and current location of the Allenspark Repeater

  4 Responses to “Allenspark Repeater”

  1. There have been many questions as to when the Alanspark repeater will be going on-line. While a specific date has not been set, some really good progress is being made and I think we can have the repeater up and running by this Fall. I’ll try and get a few pictures on the site, people seem to enjoy seeing them.
    The repeater location is known and final details of the site, antenna and equipment location are being worked.
    The repeater hardware itself is on the bench here at the QTH, tuned up, and working. The crystal pair came in about a week ago and I’m in the process of “aging them in” and making small adjustments so our frequency pair is dead-nuts-on. Duplexer “Can’s” are tuned up, what can I say.. DB4062’s are really awesome!!

    73’s.. KI0HG

  2. Saturday August 10th looks like the date we have set for installation of the Alanspark repeater. This will also be an opportunity to get the radio you received as part of the MERN training reprogrammed. Several of us will be on hand to do the programming starting at 9AM. There will be a short 30min “Get to know your Alanspark Repeater” show-n-tell 10-10:30AM, then were getting to work. This is an excellent opportunity to see the actual repeater hardware, see some of some of the more out of the ordinary test equipment in use like my IFR-1500, and ask all those questions I know you have been wanting to know.
    It is my understanding that radio re-programmed will continue while the repeater installation crew is at work.

    If you are interested in being part of the repeater work crew, please coordinate with Joe Callahan. Shall we say space is limited…

  3. Many thanks to all who participated today. We were able to get many radios re-programmed and the repeater hardware installed.


    Dave KI0HG

  4. Beginning in 2014 the Allenspark MERN Repeater experienced frequent lapses in functionality and limited ability to re-transmit weaker signals. Through observation and with the technical assistance of KI0HG, many efforts were made to identify the source of the problem with this repeater. It was determined in early 2016 that the rig was being desensitized by strong interfering signals emanating from a nearby local source. Because of spotty connectivity under the best of circumstances, a new location was evaluated at Allenspark Fire Station Number Five, which was signal-tested and found to be an excellent choice for relocation. In August 2016, with the approval of BCARES, the Allenspark Repeater was relocated to its new home near the intersection of Bunce School Road and CO 7. Much thanks go to Ueli Hauser (KB9TTI) Bob McDonald (KD0SCC) Steve Coles (KD0RFT), Bill Ellis (KD0RFR) and the Allenspark Fire Protection District. The relocated repeater works flawlessly now and has inspired the fire district to co-locate a repeater for its own public service channels, eliminating many emergency service dead spots. Thanks to all!