Stories you’ll find in our June, 2018 issue:

SDR Primer Part 1: Introduction to SDRs and SDR applications
By Thomas Witherspoon K4SWL

Whereas your grandpa’s radio was all hardware––in the form of filters, mixers, amplifiers, and the like––Software Defined Radios are a mix of hardware and software, which typically gives them a “black box” appearance. SDRs typically afford access to a dizzying array of customizable filters, gain controls, noise blankers, digital signal processing (DSP), audio controls, and more. Being able to customize the SDR’s performance and listening experience is simply unsurpassed. In the first part of this series, Thomas focuses on the basic components of an SDR system—multiple virtual receivers; recording tools and Web-based upgrades.

Radio Evolution: From Wooden Boxes to Plug-in Dongles
By Bob Grove W8JHD

In this companion piece to Thomas’ SDR Primer, Bob Grove traces the technological history of radio from tube-based wooden-box radios to solid-state radios employing Large-Scale Integration of components into compact packages. The Software Defined Radio concept was the natural next step in this evolution, affording not just economy of scale in production and superior reception parameters, but affording manufacturers the ability to change those parameters with a software upgrade. Specifically, Bob looks at the WR-DRD-171 digital decoder dongle for the high-end WiNRADiO WR-G39DDC receiver that could make it the ultimate all-band, all-mode receiver.

Uniden BCD436HP vs. Whistler TRX-1 – A TSM Side-by-Side Review
By Larry Van Horn N5FPW

We first reviewed the Uniden BCD536 in the April 2014 issue with an update six months later. As a point of reference, for all practical purposes the BCD536HP and BCD436HP are RF identical which makes the initial review worth reading. Larry’s initial review of the Whistler TRX-1 appeared in the January issue this year, in the same issue Bob Grove wrote the TRX-2 base/mobile review. RF-wise, these radios are very similar. So, after six months of intensive testing side by side and field usage, it is time to look at a comparison of the two companies top-end handhelds.

2018 Hamvention Report
By Cory GB Sickles WA3UVV

Hamvention 2018 has come and gone. It would be easy to sum it up in one word as “Wow!” But that would not do justice to an event that is built upon so much planning, volunteer effort, cooperation from state, county and local law enforcement as well as EMS personnel, Greene County (Ohio) Convention and Visitors Bureau, City of Xenia (Ohio) officials, and countless others. Cory takes us on a tour of this year’s Hamvention, with comments about those who were there and those who weren’t.

Echos of Today: A World of Shortwave and BCB listening from ‘Alexa’
By Richard Fisher KI6SN

Imagine listening to your favorite shortwave or AM-FM broadcast band station on a receiver about the size and shape of a hockey puck. It has no dials. You have an SWLing assistant whose name is “Alexa: and she is virtual. This is an example of advancing Internet-connected technology known as the “smart speaker,” with capability to please the shortwave and broadcast band listener. Richard gives Alexa his commands and enters a new no-knobs, no-dial world of global radio listening.

Scanning America
By Dan Veeneman
Scanning Miami-Dade County, Florida

Federal Wavelengths
By Chris Parris
Dallas Federal Monitoring

Milcom
By Larry Van Horn N5FPW
Monitor the 380-399.9 MHz Radio Spectrum

Utility Planet
By Hugh Stegman NV6H
It’s COTHEN Time Again!

Shortwave Utility Logs
Compiled by Hugh Stegman and Mike Chace-Ortiz

VHF and Above
By Joe Lynch N6CL
A Busy Month; DX Engineering TW Antenna Center Box Cover

Digitally Speaking
By Cory GB Sickles WA3UVV
A Midsummer’s Potpourri

Amateur Radio Insights
By Kirk Kleinschmidt NT0Z
The Siren Song of Small Antennas

Radio 101
By Ken Reitz KS4ZR
Korean Summit via FTA Satellite; The Future of C-Band; Armed Forces Day Crossband Test

Radio Propagation
By Tomas Hood NW7US
Field Day Fun, Again!

The World of Shortwave Listening
By Andrew Yoder
Remembering WWII-era Clandestine Shortwave Radio Stations

The Shortwave Listener
By Fred Waterer
Proms, DW and BBC Radio Highlights

Amateur Radio Satellites
By Keith Baker KB1SF/VA3KSF
Golf-TEE and Golf-1 Get Rides to Space

The Longwave Zone
By Kevin O’Hern Carey WB2QMY
Travelogue & Radio Ties

Adventures in Radio Restoration
By Rich Post KB8TAD
The Transition: a Tale of Two Philcos

The Spectrum Monitor is available in PDF format which can be read on any desktop, laptop, iPad®, Kindle® Fire, or other device capable of opening a PDF file. Annual subscription is $24. Individual monthly issues are available for $3 each.

As an auctioneer based in Kansas City, David Schulman, WD0ERU knows a lot about selling things. But Schulman is a little different than most auctioneers: his specialty is selling ham radio equipment.

His business, Schulman Auction, offers an end-to-end solution for those families or hams who want to downsize their current estate, or completely liquidate their amateur radio or vintage electronics gear. They pick up estates from all over the country and take care of all the logistics of the selling process.

Although he’s been a licensed ham for four decades, he didn’t immediately appreciate the amateur radio community’s need for full auction services.

“I had a very large ham estate that I was selling at a weekly consignment auction,” Schulman says. “It did so well that I started thinking about taking ham gear online and see what happened.”

His auction business has grown substantially in just over a decade and he now has buyers from around the world and sellers from all over the United States.

While it can be easy to list gear on eBay or Craigslist, sometimes sellers don’t realize that they’re losing money when a buyer can’t verify that an item is actually “as described.” Schulman related one such case where he was working with a seller to auction a Hewlett-Packard signal generator.

“You could buy them for $300-$400 all day on eBay and other venues,” he says. “This one particular unit brought close to $1,000 dollars.”

Why did this particular one sell for almost three times the going rate? Schulman says for many buyers, getting the best price is about seller credibility. “When I asked what was so special about this unit, he said, ‘you tested it and provided all the data I needed, and I was willing to spend the money necessary to get it because I just never know what I’m getting on eBay.’”

What’s hot in the market right now? He says there are a few different things that seem to get the attention of serious buyers:

• Collins gear, both S-Line and the black boxes, such as 75A-4’s, generate quite a bit of interest, as do the “newer” vintage gear from the 80s and 90s.
• Anything Kenwood, Icom or Yaesu
• Equipment that is difficult find such as a Hallicafters SR-2000 Hurricane Transceiver with matching PS-2000 power supply or a Hammarlund HC-10 SSB Converter
• Military R-390’s and R-390A’s command decent prices and get a lot of attention
• Hewlett Packard test equipment from the 80s-90s does extremely well. They were built tough, and are still extremely accurate if they were kept in decent shape

Schulman says that no matter how you sell your gear, you should watch out for some common shipping pitfalls.

“Always check with the shipper and get an estimate first. You don’t want any surprises,” he says. “In each lot listing we have in an auction, we include the dimensions and weight of an item. The shippers contact information is also included. Some folks are truly surprised when they only spend $10 on something, to find out that it will cost over $50 to ship.”

It’s important to remember that the value of an item doesn’t dictate the shipping cost. “All shippers — UPS, USPS, FedEx — charge based on dimensional weight of an item,” Schulman says. “If your 10 pound item that cost you $10 has to be packed in a box that is 20 inches on all sides, you’ll get charged at the 60-pound rate. Unfortunately, that’s just the way it is in the industry now, and we have to keep that in mind when bidding on these items.”

Another piece of advice: don’t skimp on the packaging. Here are his tips:

• Let the pros do it. Not just any UPS or FedEx location, but those that have the knowledge of packing and shipping this type of gear. Even though a vintage radio might have only cost the buyer $25, that radio might be one of a kind and irreplaceable.
• Use double wall cardboard boxes and double box when necessary.
• Wrap your radio in bubble wrap or plastic sheeting so that the packing materials don’t get lodged inside the chassis — but be careful because in some cases bubble wrap can chafe against the face of a radio and cause permanent cosmetic damage!
• Styrofoam peanuts are difficult to remove from chassis due to static and breaking down and disintegrating — don’t use peanuts if at all possible on items that weigh over 30 pounds.
• Use Styrofoam planking or foam inserts instead. It’s much more difficult for a heavy item to move around inside the box using these materials.

Buyers really like to know what they are getting as opposed to buying on self-service sites like eBay and Craigslist where they often see “I have no way to test this” or “powers up” — or worse. “I think this is one reason why our auctions have become so successful,” he says.

“I’ve talked to many families of SK’s who would have just scrapped their loved one’s ham gear if they didn’t find me,” Schulman says. “That is one of the things I love about doing what I do. I can’t save it all, but I know what I do sell will generally get into the hands of other hams who will use and enjoy the equipment.”

Since field day is just as much a public outreach as it is an emergency preparedness exercise, many clubs across the US and Canada also have additional stations set aside to demonstrate different aspects of amateur radio. Often this includes D-STAR.

I would like to extend an invitation to all clubs that are showing off D-STAR to the general public to join us on the Quadnet Array as the hub of activity for those participating in field day to be able to talk with one another using D-STAR. No, you won’t be able to count the contacts for points, but you can use the array to keep in touch, talk about how things were going in your area as well as show off D-STAR to the members of the general public that come by your field day site and express an interest in all of the radios, antennas and unusual sounds that are coming from the tents setup in the park.

The Quadnet Array is a group of persistently linked reflectors and smart groups spread out around the world. This allows users to be able to access the closest reflector or smart group to their physical location to keep the internet latency at a minimum. It doesn’t matter which one you choose, connecting to one will allow them to hear activity across the entire Array.

To connect to the Quadnet Array you will need to either login to one of the below Smart Groups or link to one of the below reflectors:

Quadnet Smart groups:

DSTAR1 in New York

DSTAR2 in San Francisco

DSTAR3 in Ohio.

Reflectors:

XRF757A in Atlanta

XLX049D in Northern Ireland

XLX307D in Wyoming

XLX626D in New Zealand

If anyone has any questions about how to connect to the Quadnet Array they are welcome to contact me directly or send an email to [email protected] and we will be happy to assist.

73 – Jeff VE6DV