History of Army MARS – can you help?

Since July I have been attending the School of Advanced Military Studies (SAMS) here at Ft. Leavenworth, KS. SAMS is a 10 month course that “educates the future leaders of our Armed Forces, our Allies, and the Interagency at the graduate level to be agile and adaptive leaders who think critically at the strategic and operational levels to solve complex ambiguous problems”. The majority of our classes are focused on the study and application of the elements of national power, international relations, and operational design. The end result is a planner who spends a year on a division or corps staff helping to draft campaign plans for operations. One of the requirements for graduation is to write a monograph (like a master’s thesis) on a topic relevant to the military. I chose as a topic to write about the history of the Army’s Military Affiliate Radio System (MARS).

I’ve enjoyed researching the subject. Army MARS was officially constituted back in 1925 as the Army Amateur Radio System (AARS). I go a bit further back into history and trace the introduction of radio into Army use and then what circumstances brought about the requirements for the Army to want to organize something like the AARS.

Once organized, the AARS had a difficult start and then went through a fairly significant reorganization in 1929. There were a few reasons the Army wanted to establish the AARS. One was to extend the Army’s existing War Department Radio Net beyond the radio stations on Army installations to achieve a greater reach to all corners of the country. Knowing the limitations of wire (telephone and telegraph) communications during significant weather and natural disasters, the addition of AARS stations to the War Department Radio Net would help the local and Federal government better coordinate and respond to emergencies. The other major reason for the founding of AARS was to provide a pool of civilians trained in Army protocol for radio operations in case of a major conflict. The Army had learned from WWI that there was little time available to amass and train a significant force. Radio operators required specific skills which needed longer training. If a trained pool of operators was already in existence, it would make it that much easier to mobilize in case of general war.

AARS did serve as a benefit in providing communications during natural disasters. However, after the Pearl Harbor attack and the country began to mobilize, AARS literally evaporated. It was not used as a pool to draw from to bolster the Army’s Signal Corps. The organization basically ceased to exist until it was reconstituted as MARS some time after the conclusion of WWII. That is one area where I have been unable to find any definitive information as to why the Army chose not to draw from the AARS pool when they started full mobilization for WWII. And why was AARS abandoned and then another domestic organization (WERS – War Emergency Radio Service) stood up in its place? If you can help show me where I can find these answers, I’d greatly appreciate it.

ARRL and the amateur community had its own agenda in supporting AARS. Both before and after WWI, the amateurs (represented by ARRL) and the US government clashed over who should have privileges in the RF spectrum. The Navy was adamant about preventing the amateurs from retaining any RF privileges that might interfere with naval radio traffic. When the ARRL got the opportunity to affiliate with the US Army through AARS, they hoped it was an opportunity to help cement their hold over the amateur RF allocations by virtue of the proven service amateurs were providing the country.

It is an interesting topic and I am enjoying digging through old copies of QST as well a Army journals.

I’ve started writing and have my first 10 pages complete. I’ll post it here soon for comment.

If you have any specific knowledge of either AARS or MARS operation between 1925 and 1963, please let me know (scott dot hedberg at sign gmail dot com). I would enjoy getting some real history straight from a primary source.

Grandview, MO Hamfest


I headed out to the Grandview, MO Hamfest (aka the South Side Amateur Radio Club’s Octoberfest) this morning – about an hour’s drive. It was a smallish hamfest hosted at a middle school. The main floor was in the gymnasium’s basketball court with a spill over section in the adjacent cafeteria. What I noticed most of all was everyone eating… biscuits and gravy with eggs was quite popular. The doors opened at 0900 but I arrived around 1030 and it seemed by this time the hamfest was starting to wind down. Most of the tables were filled and the two big vendors there was the local ham store (Associated Radio) and WB0W. The oddest thing I saw was a gentlemen trying to sell golf clubs. One general criticism (and I’ve seen this at a few hamfests) is not publicizing the forums ahead of time. If you are going to host one or more forums – put the forum name, the subject matter, and start times on the hamfest’s webpage. It may create a larger draw for your event. Also had an eyeball QSO with WE0Z who I have bumped into on APRS a few times. One last comment – while I think it is cool that you connect Oktoberfest with a hamfest, the real Oktoberfest happens in September and only a day or two in October… plus if you call your event Oktoberfest you probably need to have some beer present. I am not sure how sales of beer would be at a middle school on a Saturday morning with a bunch of ham geezers in attendance, but it would be interesting to see… and nothing goes better with biscuits and gravy than a nice beer. Both on my drive there and back I listened to K1G on 20M, a special event station near Boston commemorating the 70th anniversary of the Coast Guard Axillary. On the way there he was working all over Europe and on the way back he was working state-side stations. I was one of many who were able to get him in the log.

Cleaning up the mobile with iPORTABLE

I have been unhappy with the installation of my IC-706MKIIG and TM-D700A in my 2005 Toyota Tundra. Unlike some of the more recent models, my Tundra has little to no room to squeeze in radios. I have had both radios under the passenger seat, which was a very tight squeeze and also prevented me from easily moving the seat forwards or back. The Turbo Tuner would not fit under the seat and had to be placed on the floor behind it. This really made it difficult to seat anyone in the backseat behind the passenger seat.
Then I saw the field communication stands from iPORTABLE. My plan was to get their smaller stand (without the speaker) and mount the IC-706MKIIG along with the Turbo Tuner inside it.
The iPORTABLE box arrived Friday and this morning I took it down to the workbench.

The box came pre-wired with a PowerPole connection on the outside of the box, two 20 amp fused lines inside the box, a rack mountable shelf, and covers for the front and back.

I attached PowerPole connectors to the power lines inside the box and secured the IC-706MKIIG to the shelf.

Underneath the shelf, I secured the Turbo Tuner using two zip ties.

Then I mounted the shelf inside the box and connected the cables between the radio and Turbo Tuner. Here is a pic of the front and back:


From here I brought the box out to the truck, attached the remote cable to the front of the IC-706MKIIG and then screwed on the front cover. On the backside, I connected the antenna feedline to the Turbo Tuner, the remote speaker connection, and the control cable for the Turbo Tuner. I left the back cover off the box to allow these cables to run out the rear of the box. I then placed the box behind the passenger seat and connect the external PowerPole connector to the power distribution block under the seat.


After a test run, everything was working great.

I am pretty happy with my new setup. Now if someone needs to sit in the backseat, I can easily remove the iPORTABLE box. I can also now use this rig for portable operations without much fuss.

Digital Books

I have one of the first edition Kindles that I’ve had since last year. Previously I was using the Sony Reader and enjoyed using it immensely. The Kindle offers the exact same reading experience but with a larger selection of titles to choose from. Jeff Davis, KE9V of Signal and Noise, has previously mentioned The Radio Boys – the title of a series of juvenile fiction books published in the 1920s. Believe it or not, many of their titles are available for the Kindle. I read one and it was pretty entertaining. Another recent find in the Kindle Store was the Lord of the Rings trilogy by Tolkien. That’s pretty amazing as the Tolkien books have long resisted being available in digital format. As I’ve said above, I enjoy reading books on the Kindle and it is a huge space saver – but it does not work for me when I am using textbooks. I have found that when I am using a textbook, I need to physically make marks (highlights, underlining, stars, etc.) as well as notes in the margin – it helps me learn the material. Many of the eReaders allow you to make digital annotations… but that is not same (at least for me).

W1AW

I’ve had QSOs with W1AW when they’ve been at the Dayton Hamfest as well as other locations around the country, but I had never logged the home station back in Connecticut. That is until I was on my way back from the National World War I Museum where we had an offsite class followed by a guided tour of the museum. I’d been to the museum twice before without a guide and it was great having a guide this time. Our seminar leader is a colonel in the German Army, one of our classmates is from the British Army, and our PhD for this block is from Australia – so it was great getting an international perspective to WWI. As Americans, we tend to be myopic about WWI, not realizing that we only entered at the very end of the war. While our contribution was critical, it was a small sacrifice compared to how Europe had suffered. The museum is excellent – half is devoted to the war before US entry and the other covering the American Expeditionary Force.

But I digress – yes… the QSO with W1AW. I was on my way back to Leavenworth from the museum in Kansas City and was tuning around 20M. Up pops W1AW, the guest op was Mark from southern California, with a booming signal. I got him on the second call and am now happily in the log.

I am looking forward to the arrival of my new QSL cards so I can send one out (along with the SASE) to get a QSL card from W1AW.

Combustible CW


I had a QSO the other day with a gentlemen who was using a Navy flame-proof key. I had heard of the flame-proof key and knew that it was a military straight key – but I never really thought about why it was called flame-proof. If you have a sending speed >50 wpm, do you need to worry about fire breaking out in the radio shack? Well… the real answer is a qualified yes. I found the answer while perusing the Western Historic RADIO MUSEUM’s web page.

Many of the military keys were used with transmitters that were cathode keyed and sometimes had significant voltage on the key itself. Also, other types of equipment may have voltage levels or current levels that could cause sparking when the key breaks contact. This could present a problem in areas where flammable fuel vapors might at times be present, such as airplanes, tanks or ships during or after an attack where fuel tanks or fuel lines may have been ruptured and leaking. The flame-proof key enclosed the contacts in a sealed chamber to prevent exposure of the possible sparking to any combustible vapors so it would be possible to radio for help. The J-5-A on the left is a Signal Corps key that was introduced in the thirties but was built for many years, in fact the one shown is from WWII – built by L.B. Brach Mfg. Co. The key in the center is a Navy flame-proof key, the CAQZ-26026 built by Brelco Co. The key on the right is a British “Bath Tub” flame-proof key that is made out of bakelite. The bale clamp holds the upper part of the key (which has all of the key parts) down into the tub. There are many other types of flame-proof keys but all accomplish the same thing, isolation of the key contacts to prevent exposure of possible sparking to a combustible vapor.

… I am curious if the military actually learned this the hard way, deciding to encase the contacts only after an explosion or fire had occurred.

Joplin Hamfest

This morning I, along with my oldest harmonic, headed down to a hamfest in Joplin, Missouri. The hamfest was at Joplin’s Holiday Inn convention center, not a huge venue but plenty of room for a medium-seized hamfest. I purchased my ticket at the door (my daughter got in free) and with each door ticket came 6 raffle tickets which I deposited into the ticket tumbler. Cruising the tables here is what I saw:


I enjoyed the Tarheel antenna table – they had a see-thru screwdriver antenna that allowed you to watch the motor spin while the coil moved up and down. Pretty cool.

Associated Radio is the local Kansas City candy store and it is nice to see they made the trip down to Joplin.


Some interesting tubes.


Looks like tubes won’t be going away for quite a while.

Here’s a short video clip:

I didn’t make any purchases, but had a good time. I enjoyed seeing some of the cars in the parking lot: