AmateurRadio.com

It occurred to me recently that the reason why I can rarely bring myself to work anything other than digital modes is because the noise level on the HF bands at home is so high that listening to the radio is too unpleasant. Tune across the band and you hear dozens of carriers against a background of hash and buzz, with odd patches of warbly noises. Although the noise falls off on the higher bands the carriers if anything get worse. Forget about listening for beacons on VHF! I don’t think the problem is solvable, as I believe I am hearing the combined output of all the houses in the neighbourhood, not the product of a single rogue device that could (theoretically) be tracked down and eliminated. So my instinct is just to work digital modes with the volume turned off.

People have often asked me why I don’t operate portable or mobile from the car to get away from all this QRN. My usual answer is that I often operate for an hour or so here and there and it isn’t practical for such a short time as that. Operating from the car on a cold dark winter night isn’t as attractive a prospect as doing it from a warm shack, and my wife would probably take a dim view my going off for three or four hours at a time just to talk on the radio in any case. But Olga is away at the moment and I’m getting fed up with digital modes, so I thought I would give it a go.

I already had a Superantennas MP-1 which I bought for portable use, but haven’t made much use of it for that due to the British weather rarely being warm enough to tempt me out. (Yes, I know SOTA types operate from hilltops in sub-zero temperatures and howling gales, but I like my comforts and they’re masochists.) A quick trip to Maplin in Carlisle resulted in the purchase of a Moonraker 7 inch Turbo mag mount with the requisite 3/8 fitting. Then I drove out to a quiet spot to try it out. The spot I chose isn’t an ideal radio location as it is surrounded by hills, but I haven’t yet found somewhere with a good take-off that isn’t a “viewpoint” and packed with tourists, or anywhere that I can drive on to the beach.

I took the antenna analyzer along which made tuning the antenna a lot easier. I started off on 15m, where I got an SWR of 1.5:1. For the radio I took along my Elecraft K2, which has been little-used since the K3 came along. I set the power to 12W and searched for someone to work.

My first mobile contact was with John 9H5JW, a British expat living in Malta. He gave me a 58 report to my 59 (he was running 100W). We had a good chat for ten minutes and I felt the MP-1 was doing a really good job.

Next I heard KD4FNI from Ozark, Alabama. He didn’t hear me, unfortunately. My next contact was with Nick RV3EFR near Orel for 59 both ways. Then I tried to call Harry 7Q7HB in Malawi. He was working another mobile in Finland, but unfortunately when he finished there was a bit of a pile-up and he didn’t hear my call. He was strong enough that I’m sure we could have made a contact, as was KP4BD in Puerto Rico whom I also called without success.

My third contact was VU2DSI from near Mumbai in India. He gave me a 56 to his 59. I’m pretty sure I haven’t worked India before, even from home, so I was very happy with this. The /M suffix is really worth about 10dB of gain. “Will the mobile please call again.”

My final contact on 15m was with Mauro I5HOR near Florence. He gave me a 55.

I was pretty happy with those contacts, but I wanted to see how the MP-1 performed on a mag mount on the other bands. On 10m I got a 1.2:1 SWR, though there was nothing to be heard on that band. I went up to 40m and the SWR dip was pretty sharp and would only come down to 3:1. On 20m I got around 2:1, and managed a quick QSO with Franco IZ4NPE for a 58 report on that band, so it was not too bad.

Clearly the poor ground through the mag mount affects the SWR of the MP-1 on the lower bands. The K2 ATU can take care of this quite happily, but possibly performance is compromised as well. A permanent mount on the car isn’t an option, nor would it be worth the trouble for the amount of use it is likely to get. I will have to see if I can drill the mag mount and fit a terminal that would allow me to attach a temporary ground wire to the car body, or even a resonant counterpoise, if that would make a difference.

All in all it was a worthwhile exercise that I’ll probably try again. To make a contact with India from a parked car using 12W to a whip antenna is quite an achievement!

Series Three Episode Six of the ICQ Amateur / Ham Radio Podcast. News Stories include:-

• Memorandum on PLT
• Reverse Beacon Network
• ROS outside US license
• Special short contest callsigns
• NoV's for operation below 9 kHz
• Automotive Electromagnetic Compatibility
• New Zealand's Amateurs get 600m band
• Delayed QSL Card
• 20m ROS frequencies moved
• Tripod test with Miracle Antenna & FT-817
• Amateur Radio World Prefix Maps
• Tape Measure Satellite Antenna
• Trapping sunlight with silicon nanowires

Your feedback, Upcoming Events and Martin (M1MRB) gives some tips for growing your Amateur Radio Club.

According to DX World, Stan Strzyzewski, SQ8X announced the launching of a special website to provide aid for tsunami survivors on Robinson Crusoe Island, Chile. The mission of the website is to rally our international ham radio community in support of rebuilding island infrastructure and helping survivors return their lives to normalcy.

Furthermore, it was stated at DX World, that Dr. Galdino Besomi, CE3PG who is President of Radio Club de Chile, would declare patronage over aid action. Additionally, the club is 100 percent responsible for collecting and transferring funds to islanders and a monthly report will be posted at the club’s website for review.

Please help support The Amateur Radio Emergency Communications Enhancement Act of 2009. I’m going to quote from the ARRL’s Government Relations page to explain what it will do:

What S 1755 Does

If enacted into law, S 1755 – the Amateur Radio Emergency Communications Enhancement Act of 2009 – would instruct the Secretary of Homeland Security to undertake a study, and report its findings to Congress within 180 days, on the uses and capabilities of Amateur Radio communications in emergencies and disaster relief.

The study shall:

• Include recommendations for enhancements in the voluntary deployment of Amateur Radio licensees in disaster and emergency communications and disaster relief efforts;
• Include recommendations for improved integration of Amateur Radio operators in planning and in furtherance of the Department of Homeland Security initiatives;
• Identify unreasonable or unnecessary impediments to enhanced Amateur Radio communications, such as the effects of private land use regulations on residential antenna installations, and make recommendations regarding such impediments;
• Include an evaluation of section 207 of the Telecommunications Act of 1996 (Public Law 104-104, 110 Stat. 56 (1996)); and
• Recommend whether section 207 should be modified to prevent unreasonable private land use restrictions that impair the ability of amateurs to conduct, or prepare to conduct, emergency communications by means of effective outdoor antennas and support structures at reasonable heights and dimensions for the purpose, in residential areas.

To support this bill, the ARRL says:

Please contact Committee Chairman Henry Waxman (D-CA-30) and Ranking Member Joe Barton (R-TX-6), urging them to send this bipartisan bill to the House floor for adoption. A sample letter can be found here. Send your letters urging consideration of S 1755 by the House Committee on Energy and Commerce to Rep Waxman via fax at 202-225-2525, and to Rep Barton via fax at 202-225-1919. Also, please fax a copy of your letters to the ARRL’s Washington representative, Chwat & Co at 703-684-7594.

If you’re like many of us and have free dialing to anywhere in the US and have a fax machine, this is a very easy and very inexpensive way to support amateur radio. Make sure that you sign the letter (which proves that this isn’t just some kind of automated system sending it) and if you can, customize the letter or, better still, hand-write a letter which will draw even more attention. If you aren’t able to edit the letter from the link, please post a comment to my blog and I can convert it to pretty much any format that you need.

Thanks for helping.

(Apologies to those of you outside the US for this US-specific posting).

Yesterday Kevin GW0KIG downloaded Fldigi with the aim of trying to make some Olivia contacts. He had some success but wasn’t always sure which settings (width, number of tones) to use. He also found the number of different digimodes a bit confusing and wondered what the benefits of them all are. Well, Kevin, you’re not the only one!

The Fldigi online help has some information about the different modes. The website of MultiPSK also has some good descriptions of different modes, including the speed, bandwidth and minimum signal to noise ratio of most of them. Someone should probably take this information and summarize it on a website – unfortunately the domain confused.com is already taken.

Olivia appears to be the best performing of the multi-frequency shift keying (MFSK) modes, which should not be surprising as it is the most recently developed of them. That being the case, it might not be a bad idea for older MFSK modes that have fallen out of use to be banished altogether. There is no reason for every mode ever invented to continue to be an option on every digital mode program – it just creates confusion. The latest Fldigi beta (3.20) actually goes some way towards this by providing an option where you can specify which modes appear in the menu. The next step would be for the obsolete or little-used modes to be hidden by default.

Life on the digital modes would be easier if the commonly used modes each had their own place on the band where you could expect them to be used. PSK31, WSPR and JT65A all have their own “homes”, and Olivia also uses certain frequencies – or did until they were overrun by a certain other mode that is not available in the popular digimode programs and can’t easily be inter-operated with.

Solutions exist to help identify a mode being received, but they are hardly ever used. Both of the methods are supported by Fldigi and quite possibly by DM780 as well. One is video ID, as illustrated by the screenshot above. The software will transmit sounds to create letters identifying the mode at the start of a transmission. The other is RSID (Reed Solomon ID) in which the software transmits a signal that identifies the mode to the receiving software, which can then automatically switch to the correct mode.

There is clearly no need to use these IDs for commonly used modes like PSK31 or RTTY which can be recognized by sight and sound. That would just waste time. But for the various similar sounding MFSK modes it would be a big help if IDs were used. Fldigi runs on all platforms and it’s free, so there is no excuse for not using it and enabling the ID if you want to try some of these lesser-used modes. (Note: You really want the 3.20 beta in which the options for configuring the use of IDs have been much improved.)

RadioSport USA | Elecraft QSO Party.
Keyers sound Morse code while voices hail open frequencies and digital modes finalize the connection. The simplest form of human connectivity is the tribe. Elecraft nonetheless has built a community of loyal enthusiasts and its QSO party is an ultimate expression. It expresses one’s connection to the radio, and, in broad terms, to a group sharing a common interest.

The object is fun and why not? One goal is to collect rig serial numbers while logging old friends and making new friends. The event itself is open to everyone “no Elecraft radio required” while logged Elecraft serial numbers count five points and no rig serial number counts three points.

Rules (link).

RadioSport USA | Second Class Operator’s Marathon Sprint.
I’m laughing with the let’s not take ourselves too seriously marathon sprint. How can one have a marathon and sprint at the sametime? They can and they are!

The point is, like other events, it is social connection via the airwaves that brings people together. I wonder which is first, our technology connecting with others, or people connecting with technology, in either case, it’s a ham radio tribal weekend.

Rules (link).

SFI = 90 | A-index = 9 | K-index = 1 | Sunspot count is 31 @0101UTC.