AmateurRadio.com

I joked recently about turning to the Dark Side, well my conversion really was complete after the Boxing Day sales.

I need to set up the ability to remotely operate the station via the internet as well as experiment with internet linking systems but the wi-fi link to the shack isn't fast or reliable enough. Now if I do a scan looking for wi-fi networks I can see well over a dozen, some of them quite strong and more are popping up all the time and I suspect this congestion is part of my problem.

The Samsung Smart TV in the house was also wi-fi linked but we were having increasing issues with the BBC iPlayer and Netflix with buffering or poor quality images because of poor signal and data rates.

Ideally I would be like to fit proper ethernet cables but it is totally impractical without major upheaval or unsightly trunking a definite no-no. In the end the only workable and affordable solution seemed to be to get some of those evil Powerline Transmission (PLT) devices.

I have suffered strong sporadic QRM myself which I have assumed were neighbours PLT networking devices as I'd read the horror stories, seen the videos and anecdotal reports of mains borne noise caused by them. So I hadn't even considered it until I saw a post and video by Dan Trudgian (M0TGN) about his experiences of using some Netgear devices and the apparant lack of interference to his radio activities. Some members of South Kesteven ARS had also started using them, so I took the plunge and ordered some Netgear ones reduced on Amazon in the Boxing Day sales.


Setting them up was easy, but the acid test was how much noise did they generate? I set up one device in the shack at the far end of the mains cable run to maximise radiation. Streaming internet radio and a HD movie on Netflix I then used the FUNCube Dongle PRO+ SDR connected to the OCFD to see what noise they were generating.

Here are my observations going through the various HF bands. Where noise is present I first stopped the streaming and then powered off the devices to eliminate them as the cause, where they were the cause it seemed eliminating the network traffic was sufficient to greatly reduce the effect.

80 Meters

While the antenna isn't optimised for 80m, signals can be seen as well as noise. Before you get excited this noise has been present for quite a while and isn't being caused by the new Netgear devices. This noise is what I suspected was generated by PLT devices used by my neighbours.

60 Meters

Shocking noise but again this isn't caused by my new devices, the noise has the same characteristics as that seen on 80m.

40 Meters

The band was busy, there is some noise again but not from the new devices, this was looking encouraging. I have also showed the adjacent broadcast band.

30 Meters

Again, largely noise free

20 Meters

Still largely noise free, the QRM that is present still wasn't due to the new devices

17 Meters

This was the first indication of QRM from the new devices, however it appears effectively filtered to leave the amateur allocation clear. The faint noise in the middle picture is not from the new devices.

15 Meters

Again this band was clear of noise

12 Meters

Showing the two ends of the band again the clear signal/noise from the devices again seems effectively filtered

10 Meter

I didn't observe any additional noise on this band, but unfortunately deleted the screen grabs ;-)

So where was the QRM?

While the amateur bands appear to be filtered, the transmission can of course can clearly be seen on some non-amateur bands and apart from 16 meters seems to avoid the broadcast bands.

Conclusion 

These Netgear XAVB5221 devices seem effective, indeed doing a speedtest in the shack was more than acceptable (the dire upload speed is a 'feature' of my cable ISP)


This fairly rudimentary testing has largely given me confidence that they won't be any issues. The band conditions weren't brilliant when I did test, but even with the absence of signals on the band any noise would be evident as seen. Yes they clearly do generate QRM but thankfully not it seems in the amateur bands. I haven't heard any extra noise on any of the radios over the last few days so all is looking promising. I will keep you posted if there is any change.
Andrew Garratt, MØNRD, is a regular contributor to AmateurRadio.com and writes from East Midlands, England. Contact him at [email protected].

I joked recently about turning to the Dark Side, well my conversion really was complete after the Boxing Day sales.

I need to set up the ability to remotely operate the station via the internet as well as experiment with internet linking systems but the wi-fi link to the shack isn't fast or reliable enough. Now if I do a scan looking for wi-fi networks I can see well over a dozen, some of them quite strong and more are popping up all the time and I suspect this congestion is part of my problem.

The Samsung Smart TV in the house was also wi-fi linked but we were having increasing issues with the BBC iPlayer and Netflix with buffering or poor quality images because of poor signal and data rates.

Ideally I would be like to fit proper ethernet cables but it is totally impractical without major upheaval or unsightly trunking a definite no-no. In the end the only workable and affordable solution seemed to be to get some of those evil Powerline Transmission (PLT) devices.

I have suffered strong sporadic QRM myself which I have assumed were neighbours PLT networking devices as I'd read the horror stories, seen the videos and anecdotal reports of mains borne noise caused by them. So I hadn't even considered it until I saw a post and video by Dan Trudgian (M0TGN) about his experiences of using some Netgear devices and the apparant lack of interference to his radio activities. Some members of South Kesteven ARS had also started using them, so I took the plunge and ordered some Netgear ones reduced on Amazon in the Boxing Day sales.


Setting them up was easy, but the acid test was how much noise did they generate? I set up one device in the shack at the far end of the mains cable run to maximise radiation. Streaming internet radio and a HD movie on Netflix I then used the FUNCube Dongle PRO+ SDR connected to the OCFD to see what noise they were generating.

Here are my observations going through the various HF bands. Where noise is present I first stopped the streaming and then powered off the devices to eliminate them as the cause, where they were the cause it seemed eliminating the network traffic was sufficient to greatly reduce the effect.

80 Meters

While the antenna isn't optimised for 80m, signals can be seen as well as noise. Before you get excited this noise has been present for quite a while and isn't being caused by the new Netgear devices. This noise is what I suspected was generated by PLT devices used by my neighbours.

60 Meters

Shocking noise but again this isn't caused by my new devices, the noise has the same characteristics as that seen on 80m.

40 Meters

The band was busy, there is some noise again but not from the new devices, this was looking encouraging. I have also showed the adjacent broadcast band.

30 Meters

Again, largely noise free

20 Meters

Still largely noise free, the QRM that is present still wasn't due to the new devices

17 Meters

This was the first indication of QRM from the new devices, however it appears effectively filtered to leave the amateur allocation clear. The faint noise in the middle picture is not from the new devices.

15 Meters

Again this band was clear of noise

12 Meters

Showing the two ends of the band again the clear signal/noise from the devices again seems effectively filtered

10 Meter

I didn't observe any additional noise on this band, but unfortunately deleted the screen grabs ;-)

So where was the QRM?

While the amateur bands appear to be filtered, the transmission can of course can clearly be seen on some non-amateur bands and apart from 16 meters seems to avoid the broadcast bands.

Conclusion 

These Netgear XAVB5221 devices seem effective, indeed doing a speedtest in the shack was more than acceptable (the dire upload speed is a 'feature' of my cable ISP)


This fairly rudimentary testing has largely given me confidence that they won't be any issues. The band conditions weren't brilliant when I did test, but even with the absence of signals on the band any noise would be evident as seen. Yes they clearly do generate QRM but thankfully not it seems in the amateur bands. I haven't heard any extra noise on any of the radios over the last few days so all is looking promising. I will keep you posted if there is any change.
Andrew Garratt, MØNRD, is a regular contributor to AmateurRadio.com and writes from East Midlands, England. Contact him at [email protected].

Stories you’ll find in our January, 2016 issue:

Building Solar-Powered Amateur Radio Beacons for 630 and 10-Meters
By Geir Laastad LA6LU

In the August 2015 issue of TSM, Geir wrote about “Advanced Radio Noise Filtering Using DSP Technologies.” This time Geir puts his electronics know-how to work while he shows us how he built two amateur radio beacons for opposite ends of the amateur HF spectrum: the 630 and 10-meter bands. The site for his beacons is his remote cabin in the woods—far away from everything, which is why his beacons are also powered off the grid. Using QRP Labs Ultimate3 QRSS/WSPR kits, these beacons have to be very rugged to take the abuse Norway’s winters can dish out.

TSM Reviews: AOR DV-1 Wideband Receiver
By Chris Parris

AOR is a brand well known to monitoring enthusiasts. They have a long history of making high-end receivers featuring advanced technology capable of wideband reception from longwave to the high side of UHF. “Federal Wavelengths” columnist, Chris Parris, puts this pedigreed receiver through its paces and finds some welcome pluses and a few disappointing minuses. He especially liked this radio’s ability to seek out weaker digital signals that other radios missed and he found ways to overcome the radio’s anemic audio.

Retro Radio: Finding, Storing and Savoring Vintage Amateur Radio Gear
By Richard Fisher KI6SN

Knowledgeable radio amateurs describe “vintage” transmitters, receivers and transceivers as being somewhat relative—only you know it when you see it. That’s because each of us have our own radio experiences, some dating to decades ago and others more recent. Nostalgia is a many splendored thing. Last month he looked at broadcast-band and shortwave receivers of a rich, bygone era. In this second part, his focus is on collecting, restoring and enjoying commercially manufactured vintage amateur radio equipment. As Richard shows us, restoring these ham band workhorses requires more than just a fondness for days gone buy.

VHF and Above: Sporadic-E Propagation
By Joe Lynch N6CL

From late November to early January, and again in the middle of May through the end of July, sporadic-E propagation appears more often on VHF and above frequencies in the Northern Hemisphere. This type of propagation occurs when there is a sporadic ionization of the E-layer that appears in the late morning and late afternoon local time during those months. But, working meteor-scatter Sporadic-E is not for slow hands, Joe shows you how to work fast to successfully log QSOs using this ephemeral mode. And, for once, it’s not about expensive esoteric antennas!

ATSC Off-Air Local Television: The Programming
By Mike Kohl                                                     

The Golden Age of Television is really here. Never before has there been such an abundance of choices in TV entertainment for the home. Last month, Mike hinted at multiple delivery methods being used to deliver signals. This month he looks at the content provided by local television broadcasters to their local Over-the-Air (OTA) viewers in representative regions of North America. Mike continues to show us all how to “cut the cord,” this month looking at OTA programming rewards. You might be surprised at just how many OTA channels you can find where you live.

Scanning America
By Dan Veenaman
Pensacola’s APCO P-25 Phase 2 and Whistler’s New Scanners

Federal Wavelengths
By Chris Parris
DMR, APCO-25, MotoTRBO, and the IRS

Utility Planet
By Hugh Stegman NV6H
Mexican Military Returns to HF ALE

Digital HF: Intercept and Analyze
By Mike Chace-Ortiz AB1TZ/G6DHU
The US Navy HF Broadcast System Revisited

HF Utility Logs
By Mike Chace-Ortiz and Hugh Stegman

Digitally Speaking
By Cory Sickles WA3UVV
Digital Voice on the HF Bands

Amateur Radio Insights
By Kirk Kleinschmidt NT0Z
DVB Dongles: Beef Up your $20 SDR

Radio 101
By Ken Reitz KS4ZR
WorldSpace, WRN, WXFAX and More

Radio Propagation
By Tomas Hood NW7UST
Catching Those Winter Mediumwave DX Signals

The World of Shortwave Listening
By Jeff White
A South Pacific Radio Odyssey

The Shortwave Listener
By Fred Waterer
RNZI, BBC, RFI, WHRI and VOA

Maritime Monitoring
By Ron Walsh VE3GO
CMB: Continuous Marine Broadcasts

The Longwave Zone
By Kevin O’Hern Carey WB2QMY
SDR: I’m a Believer!

Adventures in Radio Restoration
By Rich Post KB8TAD
In Command Again Part 2: Experiments in Powering the Command Transmitters

Antenna Connections
By Dan Farber AC0LW
Stealthy Green Jolly Loop Revisited: On the Low Down

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.

Ken Reitz, KS4ZR, is publisher and managing editor of The Spectrum Monitor. Contact him at [email protected].

On the last day of the year, it seemed like a good idea to get in one more SOTA activation. It turns out that I had not been up Mt Herman (W0C/FR-063) all year, even though it’s close by. See this page for the trail description. Joyce KØJJW and I decided to hike up in the morning, reaching the summit around 11 AM local time.  This was my third SOTA activation of Mt Herman, but I’ve operated from there many more times in various VHF contests (back before SOTA was a thing in Colorado).

The road to the trailhead was in good condition but snowpacked and icy. This road is not plowed during the winter but it is often passable with a decent 4WD vehicle. Today, you could make it to the trailhead with 2WD and some careful driving. The trail conditions were typical for winter time: almost completely covered in snow with a few bare spots showing here and there. The trail was packed powder and not particularly icy. Still, we appreciated having traction devices on our boots. This trail can be downright treacherous when it ices up, so traction devices (Yaktrax, Microspikes, etc.) are highly recommended. Trekking poles can be helpful, too.

Once at the summit, I used my Yaesu FT-60 handheld radio and a half-wave vertical antenna to work people on 146.52 MHz. Having notified a number of people that I would be on the air, I actually had a bit of a pile up on 2m fm. In short order, I worked KE5QNG, WA6MM, KH7AL, WG0AT, W7AWH, K9MAP, K0JQZ, K9DBX, W0STU, KD0MFO, WB0ROK, KD0VHD and KL7IZW. Best DX was about 50 miles with W7AWH in Pueblo West. Thanks to everyone that got on the air to work me.

The weather was cold, about 15 deg F, so we didn’t stay too long on the summit and headed back down the trail. OK, maybe “winter assault” is a bit of an exaggeration. Let’s call it a fun hike in cold weather.

73, Bob K0NR

Other postings on SOTA activation of Mt Herman:
Soggy Mount Herman SOTA Activation (W0C/FR-063)
Mt Herman: SOTA plus VHF Contest

The post Winter Assault on Mt Herman (W0C/FR-063) appeared first on The KØNR Radio Site.

Bob Witte, KØNR, is a regular contributor to AmateurRadio.com and writes from Colorado, USA. Contact him at [email protected].

courtesy: http://websdr.ewi.utwente.nl:8901/

Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

After some research on the Internet, I decided to build another antenna. I figure one can’t have too many antennas and this one would be a quick build. I chose the earchi 40-6m End Fed matchbox. The plans for it are available on the Emergency Amateur Radio Club of Hawaii’s web site. It’s an easy build and from what I have read on the ‘Net about it, it said to work well.

A trip to Radio Shack and Lowe’s provided all the components except for the torrid cores which I had to order online. The first picture is the wound core.

The second picture is the completed matchbox.

The connections are very straight forward is you follow the instructions to the letter.  I cut a 30 ft piece of wire and crimped/soldered a ring terminal to the end of it. According to my research, various people use various lengths of wire with this. I chose 30 ft as that’s is what the club supplies if you purchase a completely built antenna from them.

I though this antenna would be an quick and easy one to deploy in the field if needed.

I have used this antenna a few times. The first time was in June during Field Day. I had my homemade Buddistick in use, and decided to take a break and put this antenna up. I threw some paracord over a branch and hauled up the wire. It worked great, about the same as the Buddistick in terms of signals heard. I have also used it at home a couple times with similar results. It is going to be a nice antenna to have in the kit for certain situations. 

Wayne Patton, K5UNX, is a regular contributor to AmateurRadio.com and writes from Arkansas, USA. Contact him at [email protected].

Several things:

First - The NJQRP Skeeter Hunt for 2016 is moving from the second Sunday in August to the third. So please mark Sunday, August 21st on your calendar for this year's Skeeter Hunt.  There are two reasons for this. The most important is that yours truly has an outstanding monthly commitment each 2nd Sunday of the month.  That's the Sunday I go help out at the soup kitchen in the next town over.  I kind of blew that off the past couple of Augusts, and that's not right. There are some things more important than Amateur Radio, and this is one of those.

But hey, the organizer shouldn't go AWOL, right?  (That's how I feel, anyway). So I have moved it back a weekend to the third Sunday in August, where it shall occur forever more.  Another added benefit is that this makes the spacing between Flight of the Bumblebees, the Skeeter Hunt and QRP Afield and the Peanut Power Sprint a bit more even.

Second - I have gotten blessing from Sean Kutzko KX9X to incorporate NPOTA into the NJQRP Skeeter Hunt this year.  Is that COOL or what?  I'm not exactly sure how it's going to all work out. Maybe bonus points for activating an NPOTA unit for the Hunt - or possibly some special "memento" for activating an NPOTA unit during the Hunt.  I'll have to ruminate on that one for a bit - but there's time.



Third - On a personal level, Sean announced some new NPOTA units the other day. This was a biggie for me, because in the Northeast, the Washington - Rochambeau Historical Trail was added. This is the route taken by General Rochambeau's French forces and General Washington's Continental forces as they both marched on towards the siege at Yorktown, which all but brought the American victory in the Revolutionary War.


The Washington - Rochambeau Historical Trail is within a stone's throw from my house - literally. To make this situation even better, there is the Frazee house located on the trail in Scotch Plains, NJ - the next town over. Rather than try and explain the significance of the Frazee house in my own words - allow me to post something from the official Website.


"As the legend holds, after the Battle of Short Hills, General Cornwallis and his troops passed by the house while marching toward the Watchung mountains, located a few miles to the north. Known to the locals as a prolific baker, Aunt Betty was baking bread at the time. Hungry and tired, the troops smelled the bread and Cornwallis approached her stating, "I want the first loaf of bread that next comes from that oven." Betty is said to have replied, “Sir, I give you this bread through fear, not in love.” Evidently impressed by her courage, Cornwallis is said to have stated, “Not a man in my command shall touch a single loaf.” While history offers evidence that Betty lived in the house and did, indeed, bake bread, the story of the actual conversation is not authenticated by primary source documents.  The words allegedly spoken by the principals are found in the earliest authoritative source on the subject, F.W. Ricord's History of Union County, page 513, which is one of the sources cited in the National Register of Historic Places filing that led to the Frazee House being placed on the Register."


I'll have to look onto getting permission to operate from the property that the house is on. If that's not obtainable, there are plenty of other locations that can be operated from on the Trail, right in my local area. In fact, right in front of the Ashbrook Golf Course, is a monument to The Battle of Short Hills.

72 de Larry W2LJ
QRP - When you care to send the very least!
Larry Makoski, W2LJ, is a regular contributor to AmateurRadio.com and writes from New Jersey, USA. Contact him at [email protected].