AmateurRadio.com

I received a letter from the W3 QSL Bureau about a month ago that a few DX cards were awaiting shipment. I thought about our tradition, whether or not, a paper card has practical value given alternative routes. My self addressed stamped envelopes were sent and several cards arrived a few weeks later.

I registered with Logbook of the World and eQSL services, both, in my estimation are valued services. Each with their own complimentary award programs that measure one’s ability and station configuration. Admittedly, in my case, the ease of uploading my log after an event is a positive benefit. The return is nearly instantaneous without much overhead in terms of cost and time.

However, when my bureau shipment arrived in the mailbox, something changed my mind about the value of a paper card. It was tangible. I could hold it and share the storyline that follows our final confirmation. I have stated in the past that paper confirmation is old school. It is correct given today’s digital delivery systems, efficiencies, and modest overhead.

What I did not expect was the emotive response when those paper cards arrived.

Perhaps, most of us, continue experiencing a critical shortage in recreational time. When it is available one is either working on a ham radio related project, waiting to log the next, next DXpedition or attending to life responsibilities. Recreational time is not exactly in ample supply these days.

I’m researching how-to best respond to those who followed up our contact with a paper confirmation. I want to and it is much different than a need to respond. There is a solution that balances my returned fondness for paper confirmations.

73 from the shackadelic on the beach.

There was a knock on the door this morning and the postman asked me to sign for a parcel from overseas. The customs declaration amusingly – if appropriately – described the item as “Toy”. It was the UNI-T UT-81B Oscilloscope Digital Multimeter that I ordered last weekend from eBay seller hk360radio in Hong Kong.

My first thought on opening the box was: “Wow! All this for a hundred quid? Amazing!” Inside the zip-up fabric carry case was the scope/multimeter, test probes, a BNC oscilloscope probe adapter, an opto-isolated USB cable for connecting the instrument to a PC, a two-pin wall-wart power supply and a two-pin to UK three-pin mains adapter, manual and CD containing the PC software.

The instrument is both a multimeter and a storage oscilloscope. The multimeter is auto-ranging, so the control switch simply selects the function: voltage, current, resistance etc. It measures DC voltages to 1000V, AC to 750V, current to 10A, resistance to 10M, capacitance to 100u and frequency to 10MHz. There is also a continuity tester. It can read volts down to 100uV and current down to 0.1uA. The frequency counter accuracy isn’t good enough to calibrate your radio, but it’s still quite handy.

Many years ago, back before I had a ham radio license, I had an oscilloscope that I built from a design in Radio Constructor magazine. It only covered up to about 200kHz and wasn’t calibrated. I had to sell it when I left my parents home and had nowhere to keep so much electronic stuff, and I haven’t had one since. But there have often been occasions when I wished I had one, so that was one of the main reasons for buying the UT-81B.

The oscilloscope bandwidth of the UT-81B model is quoted as 8MHz, so I can’t use it as a monitor scope for the whole of HF, but it covers up to 40m at least. I was very keen to try this. I connected my FT-817 up to my QRP power meter via a T-piece and connected a cable between that and the oscilloscope. When I spoke into the microphone I could see the modulation envelope on the display.

I was interested to see whether the horizontal scan rate was fast enough that I could see the actual RF waveform. I increased the timebase speed until I was able to see the display above of the carrier wave from the FT-817 in CW mode. The sample rate is given as 40MHz and you can just see that the waveform is a little jagged. You can see that the scope has also displayed the frequency to within 1kHz. There is a full range of trigger functions and also a manual hold you can press to capture the display, which I used to take the photo above.

There is a Windows software application that connects to the instrument via a USB port. It can log measurements over time and also capture scope displays and save them to a bitmap (BMP) file. I was able to capture the waveform shown in the photo. However it was not able to capture an RF modulation envelope when sampling the RF at a much slower time base setting. I just got a thin wiggly line that seemed to bear no relation to the envelope displayed on the scope itself. Not a major issue, though.

I am really delighted with my new “toy”, which cost me £95.50 plus £13 for the shipping (and no tax.)

Suppose you were a member of a village football team that had practised and played on the village green for years. And suppose that one day you turned up for a game and found a new rugby team using your pitch. You’d be pretty annoyed, wouldn’t you? Even though the village green is common land and so legally there for all to use, the football team would not expect its use of the football pitch established over many years to be usurped in this way. So it isn’t all that surprising that when it is, there’s a punch-up.

Turn now to the amateur bands and this is precisely what has happened to users of the Olivia data mode. Someone has turned up with a new game called ROS that requires a much larger pitch and it is interfering with the Olivia users’ ability to play Olivia.

OK, you say, but surely no-one could object to the rugby team using the football pitch when the football team isn’t using it? It’s a fair point, although as the football team uses the pitch off and on throughout the day they wouldn’t be happy about it. But here the analogy starts to fall down, because not only do the football team (Olivia) and the rugby team (ROS) not speak the same language, but they are also blind so they can’t see each other to ask even if they were able to.

The only way for the two teams to both play on the village green without falling over each other or resorting to fisticuffs is for each of them to have their own, separate pitches. Now could someone please translate this into Spanish and show it to the coach of the rugby team?