The news, opinions and events of VE3OIJ / VE3EEE
VE3OIJ

VE3EEE on the air around Christmas

Astrophysical and Geophysical, Digital Modes, DX, Operating

Just for something different, I’ve been using my second callsign lately.  I have been doing mostly digital modes, especially JT-65, between 10 and 30 watts depending on conditions.

Despite the solar conditions (K-index between 4 and 6 for the last few days) there has been some DX on all bands from 80m to 10m.

VE3OIJ

ARRL Field Day 2015

Clubs, Digital Modes, DX, General, Operating, Technology, Voice Modes

It’s the end of June and that means ARRL Field Day 2015.  Squidette (VA3CEW) and I deployed to the Outlet Beach (FN13jv, right beside Sandbanks Provincial Park) to operate a Field Day station as VE3EEE.

Equipment

We went out with the standard VE3EEE portable pack:

  • Honda EU2000i generator
  • Quad core i7 laptop
  • Yaesu FT-847
  • Begali paddles
  • RigExpert Plus TNC
  • LDG automatic tuner
  • Hy-Gain DP-19D dipole (set for 20m)
  • Buddipole (set for 15 or 40 depending on the time of day)

WX

Cold  and miserable with drizzle for basically the entire time.  That was not fun at all.  Nevertheless, we did have shelter, so it wasn’t the end of the world.

Solar WX

There were geomagnetic storms earlier in the week, but they had pretty much abated.  K-index bounced between 1 and 3.  15m down to 80m seemed to be open.  I listened on 10 and didn’t hear anything, so I didn’t bother with 6m.

Results

We made 72 contacts between 40m, 20m, and 15m, almost all digital although we threw in a few CW and Phone contacts just for good measure.

Social

We also took the time to drive across the county to visit the Quinte ARC Field Day site in Ameliasburg.  It was rainy and miserable there too, but they had a great setup with 4 radios going!

Photos

This is the buddipole set up on a sand dune. The tower isn't quite fully extended due to overhead trees. Nevertheless, it's got a good 5-7m over the ambient ground level.
This is the buddipole set up on a sand dune. The tower isn’t quite fully extended due to overhead trees. Nevertheless, it’s got a good 5-7m over the ambient ground level.
This is the buddipole set up on a sand dune. might be a bit easier to see.
This is the buddipole set up on a sand dune. might be a bit easier to see.
Hy-Gain dipole between trees. Had I planned this better, I'd have picked different trees and maybe gone for 40m.
Hy-Gain dipole between trees. Had I planned this better, I’d have picked different trees and maybe gone for 40m.
Looking northwest along the beach road.
Looking northwest along the beach road.
This is the cabin on the beach while we were setting up. The generator is in front.
This is the cabin on the beach while we were setting up. The generator is in front.
This is the VE3EEE operating position. That's a 27" touch screen on the left, which makes operating the radio a lot like a Star Trek console.
This is the VE3EEE operating position. That’s a 27″ touch screen on the left, which makes operating the radio a lot like a Star Trek console.
VE3OIJ

Making WSPR software work on Yaesu FTdx-1200

Digital Modes, Equipment, Operating, Technology

I will state up front: The knowledge I am about to lay down in print was imparted to me by Roger (GW4NOS).  I am putting it here so that a) I can find it again; and b) the internet will archive it for future seekers of knowledge.

The Problem:

Like many people I bought a Yaesu FTdx-1200 and it works very well… except when using WSPR software, there seems to be no incantation that permits CAT control to work.  Like the Reverend Mother told Paul Atreides:

The Solution:

It turns out, however, that the software can be made to work in a few simple steps.

Step 1: Select Yaesu FTdx-9000 on the WSPR software.  Apparently that radio has the same CAT command set as the FTdx-1200.

Step 2: On the radio, menu 039 must match the setting in the WSPR software.

Step 3: On the radio, menu 040 must be 100 ms or greater.  Apparently, the default of 10 ms is too speedy for the WSPR software.

Step 4: On the radio, menu 041 must be “DISABLE”.  Nothing I have uses CTS/RTS flow control anyway.

Once that was done, everything worked perfectly!

VE3OIJ

Fair price of used equipment

Equipment, General

Probably because I mention used equipment in articles like this one, and probably because I am slightly vocal about what I consider to be hams with an overly optimistic opinion of the worth of their used junk, I am sometimes asked what I think fair prices for used amateur radio equipment would be.  It being a slow weekend, I sat down and thought about it so I could put it into words and numbers.

For this analysis, I am making three assumptions:  1) that the equipment works – if it’s broken junk, that’s a whole other issue; 2) that the equipment isn’t somehow historically significant – a collector’s item of some sort; and 3) that the radio is in excellent condition with no serious blemishes, damage, etc., and comes with all its original accessories in similar condition.

In general, it seems that most of the major manufacturers have a 1-2 year warranty, and a 3-5 year product cycle.  That is to say, you buy a brand new Yaesu XYZ-1329 now, and in 2020 you can probably expect an XYZ-1430 to replace it in the Yaesu product line.

Within those parameters, this is how I calculate the fair value of used equipment:

0. Start with the current advertised price of a new model of the equipment.  If it has been replaced in the product line, then use the current advertised price of whatever replaced it.

1. -10% per year cumulative while still under warranty, and another -20% when the warranty comes off.  Assuming a 1 year warranty, you can multiply the price from above like this: *0.9 (age < 1),   *0.65 (1 < age < 2, out of warranty), *0.6 (age < 3),  *0.5 (age < 5), *0.4 (age < 6), *0.25 (age < 10), *0.2 (10 < age)

2. If the rig has been replaced in the product line, apply another *0.75 for each time it has been replaced.

3. If the rig has been used in a location with smokers or dogs/cats/fur-bearing monsters, apply *0.75.  People could argue this I suppose, but the amount of crap in the air getting sucked into the rig via fans just squicks me enough to apply this.

And that pretty much covers it.  So if I look at something like a Kenwood TS-2000, I see an advertised price of $1700 CDN today.  Therefore, a 14 year old TS-2000 from a non-smoking, non-cat home would be thus:

$1700 (TS-2000, Radioworld) * 0.2 = $340

A 10-year old Kenwood TS-850 from a cat-owning smoker would be:

$2000 (TS-590, Radioworld) * 0.25 (age) * 0.75 (smoke/cats) * 0.75 (replaced in product line) = $280

I know that many amateurs seem to think that their old equipment is as valuable today as it was when they bought it back in the 00’s / 90’s / 80’s… but that’s simply not true.  In addition to the general issues of wear and tear on moving parts and time working its magic on capacitors, there’s other factors – better use of battery power, modern computer interface capaibilities, improved TX and RX capabilities, and more that can be found in an up-to-date radio.  Obsolete radio equipment cannot be expected to hold its value like gold.

Anyway, that’s how I figure it, and it’s why I don’t buy much in the way of used equipment – because finding a fair price is very difficult.

VE3OIJ

EMCOMM and amateur radio – what is needed and what is not

Digital Modes, General, Operating, Security, Technology, Voice Modes

I’ve been reading a fair bit about emergency communications (EMCOMM) and amateur radio. Nominally, EMCOMM is why amateur radio exists – the service is there, hypothetically, to be able to provide backup communication paths when infrastructure fails. Certainly, for many years, that was a pretty valid position and amateur radio filled that niche very well.

But time has marched on, and with it has marched both requirements and technology. In my considered opinion, amateur radio EMCOMM is likely to come up short when the situation is dire. This is something amateur radio can overcome, but getting past the shortcomings is going to require a new way of thinking for a lot of amateur radio EMCOMM enthusiasts.

The Use Case

It is first necessary to consider what role amateur radio is going to fill in an emergency situation.

The goal of EMCOMM is to get timely, accurate communication outside of the disaster zone to a place where the regular communications infrastructure is not damaged.  Barring an asteroid strike that makes a crater the size of Texas and destroys an entire continent, that communication is not going to need to be more than tens of kilometers, maybe small hundreds.

That brings about my first EMCOMM observation: HF is probably not going to factor in an EMCOMM situation because it’s awkward and unnecessary.  Awkward because it needs long, difficult antennas, and propagation is unreliable.  In the event of a very wide-scale disaster, then perhaps, but generally, it will be quicker, easier, and more reliable to use VHF and UHF radio to get messages out of a disaster zone because the equipment is small and much easier to come by.

Modern “first responders” – police, fire, military, para-military and medical all have reliable, effective short-range communication technology and infrastructure.  Their comms channels are robust and intended to work in adverse situations.  For the most part, amateur radio will play almost no part in assisting these people.  It’s worth noting that, military notwithstanding, none of these essential services uses HF radio much or at all.

Secondary assistance services are much more likely to require amateur radio assistance: Red Cross, various “civilian” disaster relief agencies and so on.  These are important people in any disaster, but they’re likely not well equipped in the communications department and could benefit greatly from amateur radio  help.  Again, however, they’re going to want to move information outside the disaster zone, and that distance is not likely to be “around the world” because there are many better ways to do that than HF radio.

I’ve tried to figure out what sort of info these agencies might want to send, and the most obvious one I can come up with is a casualty list.  This is a good one because it seems both likely, and highly useful to an agency like the Red Cross or Doctors Without Borders, or some similar group.  There might also be traditional short “Hi Mom! We’re OK!” messages, but those are generally easy to send by any convenient means.

So what does a casualty list take?  Let’s consider a short list: 1500 people are at a shelter inside a disaster zone, and the Red Cross needs to send that list 75 km away to the coordination centre.  The list contains “phone book” info: name, (former) address, plus gender and date of birth.  If we figure the name field at 20 characters, address at 20 characters, gender as 1 character and birth date as 6 characters, and an indicator for unharmed/deceased/injured/missing of a single character, a list of 1500 people is about 72000 characters, or 70 kB, or in CW terms, 14400 words.

Right off the bat, you can see one problem.  That short casualty list, using 4 operators blasting CW at 30 WPM non-stop, will take a full 2 hours to send and still require coordinating the output of the 4 CW streams at the far end.  That is not acceptable in 2015.  That same list, sent by D-Star at 9600 bps, takes less than 90 seconds.  Even at 1200 bps D-Star it will clock in less than 10 minutes.  This brings me to the second observation about EMCOMM: Morse Code is not going to be used very much if at all in an EMCOMM situation because it is too slow to carry any significant amount of useful information.

What does this mean?

The general use case of casualty lists, supply requisitions and similar information simply can’t be sent by morse code or even by voice.  Modern EMCOMM needs to move small and medium amounts of data over those tens of kilometers.  Possibly even image data.  This simply cannot be done with traditional “Morse Code and HF” thinking, and not even with “packet” thinking.

EMCOMM groups have to start thinking about the objective, and they have to start acquiring the infrastructure and training to be able to provide useful communications.  This is what I think all EMCOMM groups need to have as a capability:

1. Enough available equipment to set up a VHF and/or UHF data link that can cover a distance of about 100 km, AND link to the neighbouring EMCOMM group – effectively able to form cells of about 50-100 km in radius to be able to get communications away from the disaster zone.

2. Enough man-portable (i.e. HT or similar) equipment to be able to deploy operators quickly and keep them highly mobile.  This would include easily erected directional antenna equipment.

3. The ability to move data with a speed of at least 9600 bps over the coverage area.  Even faster would be better.  That may mean we all have to start thinking of better ways of moving data.  Guys, it’s not 1980 any more.  Even 9600 is glacially slow by modern standards, and information is king in a disaster situation, but at that speed you can move decent sized text blocks around.  If amateur radio can’t move enough good quality information quickly and accurately, amateur radio will be bypassed.

4. The ability to interface with existing communications channels (e.g. the internet).  I assure you, the guys who can get internet connectivity into a disaster area are going to be viewed as heroes of communications because internet is *THE* communication channel used by every organization everywhere.  Also, being able to patch into other networks like the phone system and drag a level of that connectivity into a disaster zone would be really helpful.

5. This is a pie-in-the-sky thing, but I’ll put it out there: The ability to assist with, organize, and direct the communications infrastructure of others – in short: trained operators who can free up firefighters, police, and maybe even soldiers by operating THEIR communications infrastructure while they go out and do the nasty work.

EMCOMM needs to look at the now and forward, not back in history.  It’s time to drop HF and morse, and build up robust, portable digital communications for emergencies.  That is what will be needed when the worst happens, and that’s where the expertise of highly trained radio amateurs is going to be most effectively deployed.

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Darin Cowan - VE3OIJ
@VE3OIJ

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