RMHam U – Antennas, feedlines, SWR

12/16/2017

About 25 hams attended Chris Hamilton’s (AE5IT) RMHam U class on Antennas, Feedlines and SWR (subtitled:  Every Antenna is a Multiband Antenna).   The Chris explained why even mismatched antennas can be effective radiators as long as your are using a feed line with low loss.  The class also had a practical demonstration of wave  propagation.  RMHam holds these classes monthly during the ‘cold’ months and you can sign up by clicking on “RMHam University” in the menu bar of this web site.


AT-D868UV Questions and Silver Lining

12/13/2017

AT-D868UV in VHF digital simplexAT-D868UV in UHF digital simplex
These are VHF and UHF (respectively) captures from the AT-D868UV dual band DMR handheld.

This indicates timeslot violations during the first ~100ms of a DMR transmission, which quickly settles down to normal behavior. Other than this timeslot violation the RF is clean, looking about as good as offerings from Connect Systems and Tytera. Read more →


Support RMHAM this Holiday Season!

11/06/2017

Rocky Mountain Ham Radio has found a great opportunity for you to have a portion of your purchases through http://smile.amazon.com donated to Rocky Mountain Ham Radio.  This costs you nothing, and RMHAM receives a portion of your purchase! Click Here to sign up and support RM HAM or just visit Amazon Smile and choose Rocky Mountain Ham Radio, Inc as your 501(c)(3) charity of choice!

Our network expansion this year alone (Westcreek, Leadville and Vail) cost $15000.00 and that doesn’t include any of our maintenance from lightning strikes or equipment damage!

We would love to have your support through Amazon or donating directly to us via our link under About RMHAM Radio, Support RMHR.  You’ll thank us when you go to use our network!

 


RMHAM is an ARRL Affiliated Club

  • 12/21/2017 7:00 pmAmerican Red Cross DMR Net
  • 01/13/2018 9:00 amCCYARC/RMHR CE Testing
  • 01/18/2018 7:00 pmAmerican Red Cross DMR Net
  • 01/27/2018 8:00 amRMHAM University - Designing, Building and Deploying your PodCom
AEC v1.0.4

Maker Faire Success

11/04/2017

Rocky Mountain Ham Radio attended Maker Faire Denver on October 14th and 15th 2017 at the Denver Merchandise Mart.  The Comm Trailer was set up in an area that had great traffic and many visitors during the event.  Willem reported that the crystal receiver was a bit hit with attendees and there were ongoing discussions about Ham Radio in general and kit building in particular.  Thanks to Chris, AE5IT for leading the group.


Exhibiting at MakerFaire

10/05/2017

Rocky Mountain Ham Radio will be exhibiting its communications trailer at the Maker Faire Denver on October 14th and 15th 2017 at the Denver Merchandise Mart. 451 E 58th Ave, Denver, CO 80216.  We will be there from 10AM Saturday to 5pm Sunday.  This is a great event with many crossovers to amateur radio.  Come out an join us or just to look around.  More information is available at their website:  https://denver.makerfaire.com.

Directly from their website:

Maker Faire is the Greatest Show (and Tell) on Earth – a family-friendly showcase of invention, creativity and resourcefulness, and a celebration of the Maker Movement. It’s a place where people show what they are making, and share what they are learning. Makers range from tech enthusiasts to crafters to homesteaders to scientists to garage tinkerers. They are of all ages and backgrounds. The aim of Maker Faire is to entertain, inform, connect and grow this community.

The original Make Faire event was held in San Mateo, CA, and in 2014 celebrated its eleventh annual show with some 1100 makers and 130,000 people in attendance. World Maker Faire New York, the other flagship event, has grown in four years to 600+ makers and 80,000  attendees. Kansas City, Detroit, Atlanta, Milwaukee, Orlando, Silver Spring, Paris, Rome, Oslo,Trondheim, Tokyo, Newcastle (UK), and Shenzhen – and now DENVER – are the home of larger-scale “featured” Maker Faires and over 120-community-driven, independently organized Mini Maker Faires are now being produced around the United States and the world.


Three Sites, One Day. Again!

10/01/2017

A crack team of 15 RMHAM team members pulled off another 3 site day interconnecting the RMHAM network to Leadville and Vail.  This push gets DMR into these areas that have not been covered with DMR until now.  We now cover I-70 nearly contiguously from Genoa through Avon.  We installed two microwave hops from our Fairplay site to our Leadville and then over to Vail with three dedicated teams.  By noon on September 30, 2017, the DMR systems were in place and ready to carry traffic.  We also added new digital linking for the Colorado Connection and upgraded both the Leadville and Vail repeaters to new digital hardware!  Ski Country ARC from the Vail area assisted the Vail RMHAM team in completing this task.  Fairplay team of K0JSC, N2MED, K0GUR got the microwave in and peaked.  Leadville team of W0VG, AC0KQ, AE5IT, N0DEV, K0IBM, K7AIH.  Vail team was K2AD, WA1JHK, KI0KN, N7CTM with prework by W0KU.  Ski Country folks that helped out KD0MA, KE0JEG and N0ECT.  They installed microwave, power, routers, and all assorted cabling along with doing lots of antenna rework to handle the new configuration.


RMHAM-U 2017-18

09/02/2017

Based on the results of our survey regarding RMHAM University, we are pleased to announce an exciting program for RMHAM-U this year.

In addition to six new half day classes, we will also have a Home Brew and Kit-building Expo in conjunction with the ARA Swapfest in February.

Oct 21, 2017 DMR in Ham Radio (Mike K0NGA)

Nov 18, 2017 Getting a Handle on RF Noise and Interference (Ron N0IVN & Tom W0IVJ)

Dec 16, 2017 Every Antenna is a Multiband Antenna (Chris AE5IT)

Jan 27, 2018 Designing, Building and Deploying your PodCom (David K0PWO)

Feb 18, 2018 Home Brew and Kit-building Expo

Mar 17, 2018 RF Applications for the Raspberry Pi (Willem AC0KQ)

Apr 21, 2018 Locating Interference (John W0VG)

Click here for more information and sign up for these events.

This year we will not be providing a pizza lunch, so there is no cost to attend. Participants are invited to join us for an informal lunch and ragchew session afterwards at a nearby restaurant to be selected at the spur of the moment.

If you would like to show your creation at the Home Brew and Kit-building Expo, please sign up for the event and the coordinator Chris AE5IT will contact you with more information. Note that this event is on a Sunday morning to coincide with the ARA Swapfest, while the other RMHAM-U classes are on Saturday morning.

We look forward to seeing you there!


RMHAM Supports Tour De Ladies

07/14/2017

July 8, 2017, Parker, CO.  Rocky Mountain Ham Radio and Douglas/Elbert County ARES with the assistance of member Mark Atkinson, W0ATK made the Rocky Mountain Ham Radio Communications Trailer and cache radios available for the use of the Tour De Ladies.

Tour de Ladies is a fully supported, non-competitive, women-only cycling event through the rolling hills of Douglas County, south of Denver, starting in Parker.  The ARESDEC folks do a superb job making sure that the event is safe and fun.

Rocky Mountain Ham Radio is proud to help support the event!