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Seventeen Prefixes

20 February 2012 | by Hans BX2ABT | Leave a Comment (1)

I didn’t make a single QSO on Saturday. We had to go to my principle’s wedding in Taizhong and when we came home the radio only made a lot of noise with very few signals around. The K-index was 4 if I remember correctly, so that explains it a bit. Instead I heated up the old Weller and I finished another part of my audio filter. A Saturday night well spent.

Sunday was a different story. I hadn’t planned on participating in the ARRL contest, but there were so many signals on 15 meters from the States that it was impossible not to log some new prefixes for the FISTS 25th Anniversary Prefixes award. I spent an hour in the morning and logged 13 stations.

There was no FEA net at 0800, so I logged E73W (new country for me) and then took down the Cobweb. It was making too much noise in the wind and I need to get the wire tension fixed anyway. I put up the 10 meter vertical again and what a difference that makes! The higher bands were suffering from local noise but 40 meters was brimming with stations and even with the attenuator switched on they were still booming in. Nothing like a good vertical for 40 meters. 80 meters and 160 meters only yielded Asian stations, so back to 40 and in the course of the evening I spent – altogether – an hour logging another 11 stations from North America. In the end I counted the following 16 new prefixes for my award:

K0, KV0 / N2 / K5 / AA6, K6, KA6, N6, W6 / K7, N7, NJ7, NK7, VE7, WA7 / N9. All of them from the Western part of NA.

Add to that the E73 prefix and I didn’t do so bad at all this weekend: my score went up almost 7%. More important: my CW skills improved again, especially the rapid taking of call signs. I know there are “apps” for practising Morse code, but the best practice is still on air. Only 152 prefixes to go.

Hans "Fong" van den Boogert, BX2ABT, is a regular contributor to AmateurRadio.com and writes from Taiwan. Contact him at [email protected].

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ARRL DX Contest – 2012

20 February 2012 | by Larry W2LJ | Leave a Comment (0)

Since 0000 UTC Saturday morning (Friday night here) the bands were absolutely humming. Hard to find spectrum that wasn’t occupied by someone calling ‘CQ TEST” or with two stations engaging in an exchange. It’s now 0000 UTC Monday morning here, and the bands are eerily quiet.

The weekend was like all the others around here – super busy. I did not get to spend nearly as much time on the air as I wanted to; but I did get a couple of hours last night and then a couple more this afternoon. I added quite a few new countries to my Diamond DXCC tally. Not as many as I would have liked; but I should be well on my way now.

The bands seemed to be in good shape and I even heard some activity on 10 Meters and joined in the fun there. My plan of action was to “cherry pick” and work the louder stations I was hearing, thinking that would give my QRP: signal the best chance of being heard. I didn’t stick with that strategy, however and ended up working quite a few weak ones, too. It pretty much turned out that I was able to work anyone that I called. I even got a new one that I have never worked before – QRP or QRO. I worked ZD8Z on Ascension Island for the first time ever. Unfortunately, the only station that wasn’t able to pick me out of the din was OA4SS down in Peru. I tried for quite a while, but in the end was not successful.

I have tomorrow off for the long President’s Day weekend. I am so tired right now that I am going to turn in early and I will get my QSO for the 20th, tomorrow.

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].

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QRV on VHF digimodes using a ZLP interface

19 February 2012 | by Tim G4VXE | Leave a Comment (0)

If you’ve been reading the blog for a while, you’ll know that I have been keen to get going on the VHF datamodes, particularly the WSJT modes. I’d been thwarted up until now by the lack of an interface and I’d been reluctant to part with money until I could verify that things ought to work ok! I’d had some bad experiences with the FT-847 and interfaces in the past.

The random trigger for getting this sorted out was seeing a tweet from Colin G6AVK on Twitter that he had ordered a ZLP interface for his laptop. I hastily Googled ZLP Electronics and discovered a range of interfaces very competively priced. I e-mailed Neil, G4ZLP to ask his advice about interfacing with the FT-847 and he recommended the Pro Plus interface. On the basis of his advice I placed an order.

Two days later it arrived, well packaged. Getting the FT-847 setup proved very simple indeed – although I’d had a bit of fun and games getting the levels right from the Pro Plus interface to my FT1000MP. However, it was the VHF/UHF rig that I really wanted to interface with.

Armed with the interface and the WSJT software, I popped onto the ON4KST chat server to see if anyone was around to try a JT6M test with. Although I only have the vertical up, I thought it would probably yield some results. And so it proved, as I was quickly able to exchange signals with Pat, EI8IQ on 50MHz although the reflections ran out before we could complete a ‘proper’ QSO.

Yesterday evening, I set the receiver running on 144.370 with the FSK441 decoder going and I was pleased to decode a meteor burst from Martin OK1UGA. I shall be keen to try and work him sometime soon.

Will 50W from the FT-847 be enough? I have a 4CX350A amplifier here, but I’m sort of trying to avoid using it! And I wonder if I can make some JT6M QSOs with the vertical, or will I have to try and erect a dipole or a low beam? It’ll be fun finding out!

Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].

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A rig for £30 – the Baofeng UV-3R 144/433MHz dualbander

19 February 2012 | by Tim G4VXE | Leave a Comment (1)

I’d had the chance to play with one of the Baofeng UV-3Rs a few weeks ago and quite liked it. Like most people, I’d seen them advertised in the UK amateur radio press at around £50. On e-bay you can get them for £20 plus £10 postage. I thought I’d plump for one of those and see what happened.

The radio arrived in about 8 days from ‘RadioBanker’ in Hong Kong, beaufifully packaged and with some nice stamps! It was neatly boxed and pleasingly presented. The box includes the transceiver, the battery, VHF antenna and UHF antennas , power charger and leads as well as an earpiece and microphone. Assembly was straightforward and just required the battery to be clipped into the body of the transceiver and the cover slid down and clipped in place. I’d opted for the jaunty blue model!

The rig fits neatly into the hand. Sorry about the grubby fingers – I’d been digging the garden!

Because I had put the battery into the transceiver, I did not need to use the ‘shell’ supplied for charging the battery and just plugged the lead from charger into the DC socket on the side of the rig and set it to charge overnight. The charger supplied was a wall-wart designed for UK 3-pin plugs, unlike some suppliers who, I understand ship a US type charger and adapter.

I’ve found that battery life was good. Not quite ‘charge and forget’ like some of the larger handhelds and bigger battery capacity, but certainly good for several days operation during walks and monitoring whilst I was in the house – the battery life of 10 hours quoted by the manufacturer seems realistic.

The build quality of the rig is good. Clearly it’s not as good as rigs from the mainstream manufacturers (which are, after all, several times the price) and perhaps not quite as good as the Wouxun models. But it is entirely satisfactory. The ‘L/R’ button on the side of the rig as well as the p.t.t. button were absolutely fine but were of the type that made you wonder how they would last over time. The rig fitted nicely in my hand and also in my coat pocket, so ideal for taking out on a walk.

The manual? I should probably start by saying that if you are the sort of person that likes things to be ‘just so’ and for the manual to guide you effortlessly through the operation of the rig, then this is not the rig for you. The manual is one of the poorest that I have read. To me at least, it isn’t logically organised.

The ‘Getting Started’ section covers switching the rig on, adjusting the volume and that’s it. Then it’s onto the ‘Advanced operation’ section which is just a description, sometimes clearer than others, of the different menu items. One of the more mysterious items reads (sic), “ELAYM (Repeater Sound Response). The UV-3R comes with the Repeater Sound Response feature. When the feature is activated, the handheld transceiver will hear the sound from the repeater, that means the handheld transceiver is working via the repeater’. What?! Certainly the intent wasn’t clear to me. This is probably the most mysterious and cryptic description in the manual, but it is by no means unique. Incidentally, the ELAYM feature appears to be intended to suppress K tones from a repeater.

It all gets better from there. If you are happy to accept the manual as it is and work with the information provided you should soon get to grips with the radio. For example, though the manual says how to store frequencies in the memories, it doesn’t tell you how to recall them, but with some (not too much) experimentation, I discovered how to do this.

Programming the rig with repeater and simplex frequencies is reasonably straightforward once you master the menu system. I found programming my most used frequencies into memory was the easiest way to use the rig, because the rig didn’t automatically sense repeater channels and apply repeater shift as some do. Not wanting to be fiddling around with changing the radio’s menu items with cold hands on a walk, then setting up the memories seemed to be the most convenient solution. Programming software and a USB lead

is available, though I’ve not taken the plunge yet (it would double the cost of the rig!)

Having set up the rig with the local repeaters and a few simplex channels I made some experiments from within our house. The antenna on the UV-3R is quite small and I found that I couldn’t hear the 144MHz repeaters GB3WH and GB3RD (both about 15 miles distant) as well as on a ‘full size’ handheld such as my Icom E-92, but I could still get into them if I chose my spot. Likewise on 433MHz, GB3TD at Swindon could be heard weakly and accessed from the first floor of our house. So, if you are planning to use one of these handhelds inside your house to access repeaters or work local stations, you’ll probably need to be within 5 to 10 miles of them.

However, I was more interested in how the rig would perform when I was out for a walk in the Oxfordshire countryside. I ventured to our allotment which just happens to be on the ridge of the hills with a clear take off from west, through north to the north east. The 430MHz repeater GB3UK on Cleeve Hill in the Cotswolds is about 40 miles distant and I tried a call through it using the UV-3R. To my slight surprise, the repeater heard me easily and I put a call through it. Richard, G4ERP was operating mobile on horseback and responded to my call, as did Mike, G3TSO. Both Richard and Mike were able to confirm that the audio from the rig was good, although the deviation was just slightly low but in general the quality of my transmission was excellent. I could easily access the GB3DI repeater at Harwell and worked John G6LNU at Wantage. Rob G4XUT heard me on GB3TD and we QSYed to simplex and made a nice contact with me on the footbridge over the A420 to the south of our village and Rob at home – a distance of around 20 miles. Not bad for 2W and a small antenna! Experiments showed that the speaker/mike gave a better audio level than the internal microphone.

One issue discovered at this stage was the fact that even at bare minimum, the volume is quite loud. Sufficiently loud that if the rig is in your pocket and someone pops up on a repeater, their voice may be loud enough to surprise your walking companions or passers-by! Various modifications for this have been mooted from modifying the board to sticking some tape over the speaker. The supplied earpiece/microphone proves quite beneficial from this point of view too – the lowest volume setting seemed quite bearable through the earphone.

The UV-3R also features the capability to listen to F.M. broadcast radio, which the manual stated covered 87 to 108MHz. Somewhat intriguingly, when I first switched to F.M., it displayed a frequency of 65MHz! The tuning range appeared to be 65 to 108MHz for wideband F.M.. The tuning step is 100khz – so I was unable to tune to 70.450MHz (UK 70MHz F.M. calling frequency). However, I did verify that I could receive my own transmission on 70MHz! Given that the receiver is set up for wideband F.M. and amateur transmissions are narrowband F.M., this will be of limited use, but it may prove a useful facility. Also, in Es season, it may provide the ability to listen to Eastern European broadcast F.M. – though presumably the small antenna may prove something of a handicap. The F.M. feature does what it is supposed to do, receive F.M. radio stations. Sensitivity seemed reasonable and I was easily able to receive our favourite local radio station from Oxford, Jack FM. I enjoyed that when a station popped up on the repeater that I was monitoring = even if I was listening to F.M., the rig would switch over to V.H.F./U.H.F..

A more serious, well documented issue with the UV-3R is that the second harmonic of the V.H.F. transmitter is not well suppressed and is only around 30dB down. Since I was planning to use the rig on 70cms, I didn’t really care. However, Steve G1KQH kindly provided a link to a site where a mod to improve the VHF performance is available.

I enjoy having the UV-3R around. It is perfectly sized to fit in a pocket to take with you when you are out for a walkto the shops or on a hill. Good things about the rig are value for money, wideband receive coverage and excellent 433MHz performance. On the downside, the manual was very poor, especially for a beginner and the second harmonic of the V.H.F. transmitter gives cause for concern. Neutral points, but ones to be aware of, include relatively low power and small antenna will restrict the range and performance of the rig, balanced by reasonable battery life and easy portability.

For £30, I think this represents exceptional value – I’m delighted. And you can also get the rig in red, yellow, camouflage as well as regular black!

Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].

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Day one (for me) of the ARRL CW DX contest

19 February 2012 | by Mike VE9KK | Leave a Comment (0)

Relaxing and contesting

Well as you know I was not on the air on Friday as the speed and pileups were just out of this world. So I managed to get things done around the house and hit the air on Saturday at 9am local time. At that time I found 10m to be dead but 15 was great! I was able to make 10 contacts on 15 meters with 500mW's...it's funny I am contacting folks who give me their power as 1KW and I am getting to them with 500mW's. Any way the conditions were great but I did take a break at around 1800 UTC as things were slowing down on 15m at that time and not yet picking up on 20m's. At around 1930 UTC I was back at it again but this time on 20m's for some reason I did try 500mW's but it was just not doing it so I slowly made my way to5 watts. That seemed to be the magic power for 20m. The bands were alive and healthy out this way and I had a blast!! I have been on a total of 7.43 hours and made 252 contacts (all DX contacts that is) that breaks a record here of almost 34 contacts per hour. I have not started to log contacts for the ARRL DXCC diamond jubilee so this was the contest for me to get that rolling. Up to this point I have 50 contacts toward the certificate. Sunday is another day and I plan to get up early to pounce on some 10m contacts and 50 more DXCC's......dreams are free as they say..........

Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

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New offering from Four State QRP Group

18 February 2012 | by Larry W2LJ | Leave a Comment (1)

The following was announced today on the various QRP e-mail reflectors:

The Four State QRP Group is pleased to announce a new kit, the Stand Alone VXO (SAVXO) designed by Jim Kortge, K8IQY. The very complete manual, specifications, and ordering information can be found here http://www.wa0itp.com/savxo.html PayPal is accepted. It is shipped with 40M components but can easily be used on any HF band.

This is a Super VXO design which has it’s origins in the Super VXO of the SS-40 receiver. It is crystal controlled yet combines frequency agility with smooth stable tuning, and NO perceptible drift – even from a cold start. It is ideal for driving your NS-40 or other crystal controlled transmitter or receiver, and is also a great starting point for a transmitter strip of your own design. As kitted the SAVXO will put out over 250mW by itself, plenty of power to operate QRPp if desired.

All proceeds go to fund OzarkCon. As always thank you for supporting the Four State QRP Group. http://www.4sqrp.com/

I ordered mine! And once OzarkCon 2012 is over, I’ll be ordering a Magic Box kit, too.

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].

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I need to follow my own advice

18 February 2012 | by Larry W2LJ | Leave a Comment (2)

I went downstairs and flipped the K2 on and tuned around 40 Meters – WOW !!!!!!

After a long and full day of work, my brain is simply not ready to wrap around 40 WPM code. I worked HG3R who was cruising at about 35 WPM and called it a night. Tomorrow, after a good night’s sleep and after the opening hours pandemonium is over, I will be ready to jump into the fray. Also, during the daylight hours, stations will be spread out more as other bands open. Seems like right now, everyone is crammed into 40 and 80 Meters.

I’ve been at this Morse game for over 30 years now; and I really admire these guys who can while away at 40 – 50 WPM. I would love to be able to attain that kind of speed; but right now, it sounds more like a buzz saw than Morse Code. God bless them, you have to admire and respect that kind of ability.

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].

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