Category Archives: General

Articles about Amateur Radio and the Nashua Area Radio Society. This is a general category which includes most articles on our website.

Winter Field Day 2020 Final Station Test

Winter Field Day 2020 is almost here! A few weekends ago, Jerry K1OKD, Jon AC1EV, Andrew NF1H, Anita AB1QB, and I got together at our QTH to complete the final station test for our planned 5O operation in Winter Field Day (WFD).

Portable Wireless Networking

Portable Wireless Networking Pod
Portable Wireless Networking Pod

In preparation for WFD 2020 and our test, I built a new Wireless Networking Pod. This unit was made possible by a very generous donation of a router with LTE wireless access capabilities by Dave, K1DLM.

Networking Pod Details
Networking Pod Details

The system consists of the following components:

Our Networking Pod will be used in a number of ways to support Nashua Area Radio Society activities including Youth Expos, Ham Bootcamps, Field Day Operations, Portable Operations, and others. It provides a wired and wireless (via WiFi) network capability including DHCP, DNS, Firewall and other IP services that can be used to network computers running the N1MM+ logger and other apps. It can also be used to provide wireless internet access via LTE in situations where we need this.

Station Testing

VHF Station #2 Test
VHF Station Test

We had already assembled and tested our two Winter Field Day 2020 HF/VHF+ Stations during a previous station test so the final test was focused on the three planned HF stations and the networking of the N1MM+ Loggers that we’ll be using.

Winter Field Day 2020 HF Station and Network Test
Jerry K1OKD and Jon AC1EV Perform an HF Station and Networking Test

We set up the three HF stations and connected the associated laptop computers to the Network Pod for the test. Each of our HF stations includes:

WFD Station Building in Progress
Triplexer and Bandpass Filtering system at Winter Field Day

We also tested our Triplexer and Bandpass Filtering system along with the radios.

160m All-Mode Station Main N1MM+ Monitor

A big part of this test was to get the N1MM Logger+ working with the radios and in a network configuration using the Networking Pod. Networking N1MM+ enables us to maintain a common log across the 5 stations in our Winter Field Day setup. All of the stations were also set up for SSB Voice, CW and Digital operation via N1MM+.

All of the station tests are complete and we are ready for Winter Field Day! Come on out and join us for what I am sure will be a lot of fun!

Fred, AB1OC

Member Spotlight: Rick Boswell, K8EZB

I recently returned to amateur radio after an absence of 50+ years. My interest in amateur radio began around age 8 or 9 as a result of encouragement by my father who had been a ham earlier in his life but had been inactive for some time. He brought home a military surplus receiver covering the ham bands and gave it to me to “play” with. He later obtained a set of WWII Army 78 rpm code practice records and helped me build a crude code practice set using a junk box transformer, a door buzzer, and a straight key fashioned from a metal strip cut from a coffee can. First licensed as a Novice in 1957 and upgraded to General a year later. General reinstated May 2017 and original call sign K8EZB reissued as a vanity call sign; Amateur Extra as of December 2017. Current amateur radio interests include software-defined radio technology and vintage HF SSB equipment, mainly Collins and E.F. Johnson.

First QSO as a Novice utilized a homebrew one-tube xtal oscillator built on a piece of Masonite and a borrowed WWII German (Siemens) military receiver. The transmitter power supply was constructed with parts salvaged from discarded broadcast receivers picked from the neighborhood trash. My only xtal was in the 80m Novice band; antenna was a 15m dipole because that’s what I had! Worked a station in Michigan from my Cleveland, OH QTH – DX as far as I was concerned, and QRP (by necessity) long before it became trendy. Moved on to a Heathkit DX-35, Johnson VFO, and a National HRO receiver which was ancient even then. The final station before life intervened was a Collins 75A-1 and a Johnson Ranger.

While in high school, I became interested in an aviation career, but soon found my uncorrected vision wouldn’t cut it with the military or airlines. For this and other reasons, I chose a career in technology (with this choice strongly influenced by my amateur radio experience), went on to complete a Ph.D. in computer engineering at Case Western Reserve University, and began flying as an avocation while in graduate school. While working on the Ph.D., I was invited by my faculty advisor to join a new company he was starting. Up to that point, I had assumed I would follow my graduate school colleagues to Bell Labs – seemed like everyone in my department was going to Bell Labs – to pursue a career in industrial R&D. However, a taste of the entrepreneurial life changed my direction in a major way. Finishing my degree, I had an offer in one hand to join a computer architecture group at Bell Labs, and an offer in the other hand to join a small Cleveland company doing innovative work in point-of-transaction systems as VP Engineering. I chose the entrepreneurial route and never looked back. Along the way, I took time off to do an MBA at Harvard. This led to a progression of senior-level jobs in marketing and general management in technology companies, including President/CEO of the E. F. Johnson Company of Waseca, MN.

EFJ, a well-known manufacturer of amateur radio and CB gear until the early seventies, left these markets well before I joined the Company. We were focused mainly on land mobile radio and cellular during my tenure there. In addition to developing and marketing the LTR family of land mobile products, we did cell site radios and subscriber equipment for AT&T AMPS (first cellular service in the U.S.) and air and ground radios for the Airfone in-flight phone service under contract to Airfone, as well as continuing the legacy components business (connectors, tube sockets, variable capacitors, etc) which was the basis on which EFJ was started in 1923. Edgar Johnson (founder) was still living but was retired when I was at EFJ and we had some spirited conversations. While no longer active on a day-to-day basis, he continued in an informal role of an elder statesman. After multiple reincarnations in more recent years, EFJ continues today as part of JVCKenwood and no longer has a presence in Waseca, MN.

The most recent 25 years of my career have been as a founding partner (now partner emeritus) in a venture capital firm investing primarily in startup companies in Silicon Valley and New England. I worked from an office on Sand Hill Road, Menlo Park, CA (the heart of Silicon Valley) for much of the nineties, and later moved to the metro Boston area to establish an East Coast office for the firm. Over my time with the firm, we invested in several hundred early-stage companies in the areas of technology (telecommunications and computing), healthcare, and consumer products and services.

Active general aviation pilot since 1966; FAA Commercial Pilot certificate with Airplane, Helicopter, Glider and Instrument ratings, Douglas DC-3/C-47 type rating. Currently flying an Enstrom 480B helicopter. The 480B is a derivative of the TH-28 design which Enstrom developed in the early 1990s in response to an Army RFP for a new training helicopter. After losing this competition to Bell Helicopter,  Enstrom civilianized the TH-28 to create the 480B while retaining much of the military required robustness of the TH-28 design. The 480B seats five and is powered by a 420 HP Rolls Royce turbine engine. There are now several hundred 480s in service around the world, including as training aircraft with several foreign militaries. Dean Kamen, a well known local entrepreneur, owns two 480s, and at one time owned the  Enstrom Helicopter Corporation, as did note attorney F. Lee Bailey.

Shown below is the aircraft in which I did a DC-3/C-47 type rating, and it has a remarkable history.  Flying this legendary aircraft was quite a thrill. After several recent changes in ownership, this aircraft is now based in Europe, is still flying, but is no longer painted in the military colors shown here.  (A type rating is an aircraft type-specific FAA  credential required to pilot an aircraft with a gross weight above 12,500 lbs. Obtaining this rating requires a pilot to complete a rigorous oral exam and flight test covering all phases of operation, administered by an FAA representative. My flight test included an unanticipated ILS approach to  minimums in an unforecasted Spring snow squall – talk about pressure!)

Douglas DC-3/C-47 N59NA

Recently back on the air with an IC-7300 and IC-7610 (the SDR segment of my interests) and have discovered FT8, PSK31, and RTTY; with a newly erected multiband long wire I am having great success with these modes, working more DX in a few hours OTA than in my entire previous amateur radio experience.

Primary TX/RX: IC-7610/IC-7300/A1200S/04AT
Other TX/RX: FT-1000D/FT-1000MP/32S-3/30L-1/Pacemaker/Thunderbolt/Valiant II+SSB Adapter/Invader 200/75A-4/75S-3B
Antenna: MyAntennas EFHW-8010-HP long wire at 15 ft in horizontal “L” configuration
Software: DX Lab Suite, HDSDR, WSJT-X, JTAlert, PSK Reporter, WSPR
Other Equipment: TelePost LP-700, Heil PR-40, assorted vintage, and modern test gear
Memberships: ARRL, Nashua Area Radio Society (NH), Order of the Johnson Viking

Rick, K8EZB

More Station Upgrades At K8EZB

In a previous article on K8EZB station upgrades, I mentioned plans to add an Acom A1200S amp and 04AT tuner to my existing IC-7610 based station. This proved to be a bit more of a project than first thought. Some details below.

Ground System:

I had not previously used an amp in any of my stations, so I sought some advice from those with experience at this. All advised that a good ground system is even more important when using an amp, so I went to school on amateur radio ground systems. My main resource was the ARRL Grounding and Bonding book. After reading this carefully and consulting several other publications, I decided to install two ground rods interconnected with the electrical service ground rod, for a total of three ground rods. I was reluctant to drive in the new ground rods with a hammer or hammer drill, so looked online for alternatives. I came across several YouTube videos showing a “hydraulic” method using water pressure to make a hole for the rods, and decided to try this method. I purchased two 10 ft sections of copper plumbing pipe and attached a fitting to one end which allowed the connection of a garden hose. Using no more water pressure than is available from a common hose spigot, I was easily able to insert about 8 ft of each copper pipe into the ground using only water pressure. A few gentle taps with a hammer left about 6 inches above the ground. Ground rods were spaced apart about 20 ft and interconnected with heavy solid copper wire buried just under the surface. An Alpha Delta surge protector and DXE copper ground clamps were used to finish-off outside portion of the system. Exterior cables/components were installed in 2.5 in PVC pipe and irrigation system boxes for protection and easy access.

K8EZB
“Hydraulic” Ground Rod Installation
K8EZB
Exterior Cables/Connections

Grounds at the station operating table use a copper bus bar from KF7P Metalwerks, with each piece of equipment connected to the bus bar with 1” copper straps from Georgia Copper, also used to connect the station bus bar to the main Erico ground bus.

K8EZB
Shack Ground Bar
K8EZB
Georgia Copper Ground Straps
K8EZB
Erico Main Ground Bus

RFI:

Despite careful attention to grounding, I experienced two instances of RFI at higher power levels when using the amp. In one case, RF was getting into my station computer UPS, and in the other case, into my DSL modem/router. These problems were fairly easily solved by similar but different methods. Both solutions used generous application of ferrite beads and homebrew common-mode RF chokes wound on mix 31 ferrite toroids from KF7P Metalwerks and applied as suggested in an excellent paper by W1HIS. Getting the RF out of the router required, in addition to the RF chokes, relocating the router a considerable distance from the RF source and powering through a small UPS. All this took some patient research and sleuthing, but finally paid off.

K8EZB
Ferrites
K8EZB
Typical Common Mode Choke (USB)

Amp and Tuner Issues:

After doing considerable homework researching amps in the 1000-1500 watt class, I selected the Acom A1200S amp and companion 04AT tuner. One key requirement was a solid-state amp. In addition to the Acom, I initially considered the Elecraft KPA-1500, Flex PGXL, and Palstar LA-1K with Palstar HF Autotuner. I eliminated the KPA-1500 due to price (significantly more expensive for relatively small power output advantage), fan noise complaints, and reports of early failures. The Flex PGXL was made from unobtanium, not available for at least 8-12 months even after being introduced two years previously, and was the most expensive of the lot by a wide margin even without a more unavailable tuner. Both of the Palstar units had a mix of favorable and unfavorable reviews and, to my eye, a clunky looking industrial design. Although the Acom A1200S has had teething problems in the past, recent reviews have been mostly favorable, the price was very competitive, the industrial design appealing, the tuner nicely integrated, and the fact that DXE handles U.S. service made this choice fairly easy. However, all has not been wonderful with this choice. Due to a significant number of “nits” in the design, documentation, operation, and factory support of this product, I can give it no better than an “adequate” rating at this time (3 on a scale of 5). Most significant is a firmware bug I discovered when using the amp with recent vintage transceivers (IC-7610). The amp/tuner does not handle the digital modes correctly when executing a “Tune” cycle, and returns the transceiver to an incorrect mode at the end of a Tune, requiring the operator to manually reselect the correct transceiver mode; not a huge deal, but shouldn’t be necessary in equipment at this price point. I have communicated this issue to Acom in Bulgaria, and they acknowledge the problem, which they believe can be corrected with a future firmware update, however no visibility yet of the timing for a firmware fix.

The 04AT tuner incorporates a 4-port antenna switch and can be located remotely (closer to the antenna feed point) if desired. Antennas are selected from the amp front panel controls.

Acom A1200S
Acom 04AT Tuner

Despite the issues outlined in this update, I now have things settled down and working well. I still believe the Acom amp to be the best choice of those considered and actually available now. The Acom amp and tuner basically convert the IC-7610 into a 1200 watt transceiver, with band/mode changes executed quite transparently with the click of a mouse.

Rick, K8EZB

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