Posts Tagged ‘CW’
Nifty I Phone Morse Code Decoder
July 6th, 2015 | 
Author: HOT PAW
MORSE CODE DECODER FOR I PHONE
Screen Snap of Hot Paw Morse Code Decoder
I recently installed a ham radio station in my truck. Since then I’ve been having a lot of fun with it, using SSB mostly, since that is a novelty for me. Most of my operating has been using CW, but taking a side trip into PSK occasionally. Logging is somewhat cumbersome in a truck. I used big elastic bands to attach a small clip board to my leg so I could quickly write down a call sign and very basic information. This information would be then transferred to a computer log at home. I tried using the computer in the truck also, and that proved even more cumbersome, having the laptop jammed into the steering wheel.
I like to use a keyboard to send code but no matter what I used, it was a bit awkward in the truck. At the very least, the laptop stays put when its jammed into the steering wheel. Using the passenger seat would require my changing the radio head orientation, the antenna control and paddles which are all set up for easy use from the drivers seat.
Occasionally I’d switch to CW and fumbled for a pen to write down a call sign, time, and band. The guy I was chatting with on 40 meter CW was running just a tad too fast for me to copy ‘everything he sent’, so I missed some of it. It seems that the ‘buffer in my brain’ is smaller than I’d like it to be and with FIFO being the rule, the beginning of a word vanishes as I copy the ending.
(FIFO, First In, First Out’) Some folks may complain that using a ‘decoder’ is cheating somehow. Yes, for a contest, but for every day QSO’s its not cheating at all. If you don’t like it, don’t use it!
I discovered this app and tried it last night for the first time. Wowzah, can it copy code! Just lean it up against your radio, or just near it, and it copies CW. This is a really great help when someone is sending just a ‘tad faster’ than my ability to copy ‘everything’! Its also handy to ‘get the entire call sign’, while I was fumbling with other things in the truck! It works pretty well even in poor band conditions, and has Farnsworth Method as well as regular copy. It has ultra high speed copy, but I have not tried it. 1oo WPM code is hard to come by on the air.
This proves very useful in the truck, but my guess is that other hams will find it handy in other ways.
Field Day Memories
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| courtesy: arrl.org |
Field Day always followed the end of school and the start of the summer holidays so it was always a weekend that I looked forward to, months in advance.
I always went out with the Vancouver Amateur Radio Club (VE7ARV) who used the same spot each year, just above the last street of homes high up on the slopes of West Vancouver ... it was at the base of Hollyburn Mountain and was a spectacular visual site, giving southerly views from east through west. At times it seemed like you could almost see California from up there ... it was a great spot for both HF and VHF. Our Field Day site has long been reclaimed by palatial-sized home in the prestigious 'British Properties' region of Vancouver's North Shore.
Sadly many of the organizers and operators that I remember from my youth are now long gone but they were an enthusiastic group of old-time hams that always had the time to make a young kid feel welcome and part of an important operation. Many of the same fellows were responsible for a lot of teens getting their ticket back in the late 50's and 60's. Tuesday nights were always spent in the basement 'classroom' of Hedley Rendell, VE7XW, who gave so much of his time to Elmering prospective hams as well as providing the trailored crank-up towers for our FD operations. He later established Rendell-Paret Electronics in partnership with Bill Paret, VE7AM, and the contents of Hedley's vast basement collection of parts was the beginning of a business that still flourishes to this day.
Field Day always had many high points for me. One of the best was being able to operate some top-notch equipment compared to my humble home station which consisted of an old Heathkit AT-1 and VF-1 VFO and then later, a much-used DX-35, purchased on one of the family's summer shopping trips to Seattle. In those days, the city was home to several ham radio shops and at least a dozen radio-surplus stores, all now long gone.
There were usually a couple of Collins 75A4's and later, state-of-the-art Drake 2B's. The Johnson Ranger was always reliable and such a pleasure to operate but there were always a few hundred-pound hernia-makers like the Heathkit DX-100's and the Johnson Viking II's that had to be lugged from back seats to tents every year. That's where us young guys came in handy.
VHF activity back then was mainly FM (at least in the Vancouver area) and every year we would manage to work down to the weekend hilltopers in Oregon, mainly due to our elevated location. 2m FM rigs in those days were all converted taxi rigs, mainly Motorola 5V's, run on their built-in DC vibrator supply or on a homebrewed power supply. There were at least a hundred guys on 147.33 FM, all with old taxi rigs and the frequency was busy 24/7 it seemed. These were the days before repeaters and working 50 miles was a real accomplishment.
I usually took the 40m CW shift and would operate all night. The band was always amazingly crowded with nothing but FD stations throughout the entire activity ... even the 40m phone band was plugged solid with AM action, all working the FD contest. I would never ever sleep at Field Day and would go home exhausted, usually sleeping an entire Monday, to recharge my battery ... fun days.
I haven't been out on Field Day since my late teens as other things in life became more important but I'll never forget those wonderful weekends and the great fun that was had, so many years ago
Listening to code practice
"Whoa! What's that now? How can listening to code practice help improve sending?" you might be asking yourself (and me).
By listening to the timing gents (and ladies) ...... it's all in the timing - and the spaces.
Too many times I get carried away and ignore my spacing. Spacing between individual characters and spacing between words and even spacing between sentences is critical. Ignore spacing and I'll bet you dollars to donuts that you leave others scratching their heads trying to figure out what you're sending. You probably run into a lot of "Gotta QRT now" scenarios, too.
By paying attention to your timing and spaces, and you'll be that guy that everyone wants to QSO with - you'll be that guy with the "good fist". Run on sentences and run on words are not only hard to read - they're also hard to hear.
So I listen to W1AW to remind myself from time to time what perfect code sounds like. The more often I hear perfect code, the better I am equipped to emulate it. Oh, and this doesn't apply only to the QRQ guys, although I suspects it's more important for them. Proper spacing applies to the QRS guys as well - no one is exempt.
Do yourself a favor and tune into W1AW every now and then - especially if you feel you don't need to.
72 de Larry W2LJ
QRP - When you care to send the very least!
Tenner – a 500mW CW transceiver for 10m
This was a rig I built and used a few years ago for 10m CW. As you can see, the design is simple but it worked across the Atlantic many times. Pull the crystal too much and the RX-TX offset becomes too great. Ideal as a simple rig for 10m CW.
How simple?
Some years ago I attempted to see how few components were needed to communicate on 10m. The Lesser Chirpy was the best I could manage. This was a derivative of The Chirpy, which worked, but had far too much chirp!
Looking at the circuit I see I could save 1 component by replacing C1 and C2 by preset C’s and shorting out C3. This would allow the TX-RX offset to be set. If one was made a variable rather than a preset the RX-TX offset could be adjustable.
Since being ill I have not tried the rig. A limitation was the limited RX sensitivity, meaning only stronger stations would be workable. However, the rig does work and is very simple. Another possibility is to switch to an external RX but allow the internal RX to be used when signals are strong enough. The TX power is certainly enough to span the Atlantic and work all over Europe.
The secret to low chirp on 10m is the use of FSK rather than CW. Essentially the TX changes frequency rather than go from RX to TX every time. This means full break-in is not possible in such a simple circuit. Can you do better? If so, I’d love to see the schematic please. I make no great claims for my circuit, which is an amalgam of ideas. Pure fun!
HF Mobile, A Different Kind of Radio Shack
The Scorpion Antenna is mounted in a good spot in the rear of my pickup truck bed. Seen here at Hagen’s Cove in Perry Florida on the Gulf of Mexico in the ‘big bend area’!
Going Mobile, Rag Chews, Nets, CW, its all available and very doable when you are on the road!
Mobile HF radio adds yet another dimension to Ham Radio. This is my second go, at HF Mobile operation.
Years ago, when ‘real life’ happened to me, I had no home QTH to operate from so I bought a new (at that time) Icom 706 M II G radio. It was a great choice. A DC to daylight rig, and its still working 15 years later. This next episode of HF mobile is greatly improved over my previous one. A good antenna at the time, was made by High Sierra. It was a screwdriver type. (the original mobile antenna’s were nick named ‘screwdriver’ because they used an electric screwdriver for moving the coil)
High Sierra no longer makes mobile antennas, but the good news is there is a good company making them in Arizona, Scorpion antennas!
The Scorpion antenna is a heavyweight, at 18 pounds and it needs a very robust base to hold it. Breedlove Mounts
Its the Rolls Royce of Mobile screwdriver type antennas, and not just because I bought one, it is indeed, a very rugged and carefully crafted antenna.
I’m primarily a CW op so I incorporated a touch sensitive paddle to do CW on the move or sitting still in a local park like this one at Hagen’s Cove, on the Gulf of Mexico in the ‘big bend area of Florida!’
The cap hat ‘whip’ is a 3 foot rod of solid aluminum. It shortens the overall whip. This is nice for parking my truck in the breezeway without hitting the roof.
A motorized coil is moved up or down electrically! Listening for the greatest noise, depending on the band of choice, puts me in the ball park for checking the SWR. A 1:1 ratio is easily obtainable if care is taken during installation. Bonding straps are a must. All the parts of the truck body, door, tailgate, hood, fenders and truck bed, must be bonded together to from a good RF ground. Not a DC ground, mind you, but an RF ground plane. (The ‘other half’ of the antenna’)
All the body parts of the truck must be bonded together with straps. RF flows on the surface not the cross section of a conductor, so the wider the better. Copper flashing best carries RF current but a compromise is make for braid due to continuous flexing while opening and closing doors, and tail gates.
Bonding is one of the things that separates a good installation from a poor one. I had fun with the first truck and radio set up back in 2001 but I learned a lot about mobile HF radio since then and did things differently this time.
Location, location, location! It sells real estate and its very important for HF Mobile Antennas!
What makes a good location on a vehicle?
I’ve seen many examples of HF radio antenna installations that work, but some work much better than others. Besides bonding, another good trick for a good installation is to use a very good location; the main mass of metal must be Directly under, not near, the base of the antenna. Will a bumper mounted antenna work? Yes, but one with a mass of metal directly beneath the antenna will work better.
Its simply a case of, more bang for the buck!
Positioning the bottom of the movable coil above the truck side wall is best.
The Scorpion antenna movable coil still has the protective bubble wrap on it in this picture.
Clearance is important!
The bottom of the coil must have clearance from metal objects like the side wall of the truck.
Detailed installation instructions come with the scorpion antenna. This is very important. A good installation will insure good operation. Skimping on installation will only hurt you in the long run.
I installed an auxiliary battery in the back set compartment of the truck. Its a sealed lead acid 75 Ah battery made by Optima. I bought it trough Apex Battery.
Optima Blue Top from Apex Battery co.
Optima Blue Top 75 Ah Auxilliary Battery
I can use either the auxiliary battery or the truck battery or both at the same time, thanks to a marine dual battery manual switch.
See its picture below.
I used #4 wire to connect the truck battery in parallel with the auxiliary battery in the back seat area. This large gauge wire greatly reduces voltage drop between the batteries. For extended stays in one place, I can operate on the auxiliary battery, without running the engine. This insures that the separated truck battery will start the truck when I’m done operating.
I have not yet mounted this switch on a back board, but that is coming. I need both hands to operate the switch now and I want to be able to do it with only one hand!
Dual Battery Switch in the -Both-Battery- Position
The business half of the IC 7100 is mounted to the floor of the truck on the hump. The battery box can be seen with a power pole connection box on top.
The control box for the IC 7100 rides up front on the center console as does the touch sensitive paddle. The microphone hands on the cup holder.
I have a Warren Gregoire headset for SSB. It features a noise cancelling microphone. Warren Gregoire Headset (no relation to me)
(Special note here; its illegal to have both ears covered with a headset in Florida while you drive.)
Its a stupid law because you can legally drive in Florida even if you are stone deaf! So that kills the reasoning for ‘listening to sirens’ on emergency vehicles!
Okay, that rant is done! Back to the Mobile installation.
Battery Box, with Power Pole Box,-top, IC 7100-bottom
AA1IK, Using Warren Gregoire Headset 2
Join me on a new Yahoo Group for HF Mobile ops.
New HF Mobile Yahoo Group
Here I am using the Warren Gregoire headset. This headset has a noise cancelling mic so its a good fit for mobile HF radio. SSB is a new thing for me. I’ve been a CW op, for most of my ham life. I’m having a great time meeting new folks all around Florida on 40 Meter SSB. Ham radio has lots to offer and I’m glad I have not yet exhausted all the possibilities. I have not forsaken CW, but SSB is a fun mode, as I’m sure many of you already know.
The IC 7100 is a two part radio. You saw the ‘business end’ in a previous photo. This photo shows the control head and the touch sensitive paddles Touch Sensitive Paddles They are held in place with a bungee cord. The black plate that you see here is a small plastic clipboard with the clip removed. It is glued in place to the light brown plate, and that is also a clipboard with the clip removed. Both clipboards are held in place with bungee cords. This allows me to remove the control head and the paddles for security reasons.
IC 7100 and Touch Paddles
Remote Switch-top, SWR/RF PWR Meter-left, Speaker-right
The remote switch for moving the antenna up and down to tune in each band is show in the little cubby hole. The SWR/PWR meter is stuffed into a hole where the ‘never has been used-ashtray’ was. The speaker is mounted just above the cup holder.
Remote Switch Moves Antenna Up and Down to Tune Each Band
This photo shows the remote switch. It is hand held, and easily put away after the antenna is tuned.
So! That is pretty much the end of a walk through in my new mobile ham radio shack. So far, I’ve listened to CW on the road but have not called CQ or talked to anyone while driving. I became interested in CW Mobile early in my ham radio career.
The first requirement for operating CW Mobile, according to an article that I read on the subject, said to ‘become a dynamite CW operator! Its been almost 25 years since then and I’m still working on that first requirement.
I’ll keep trying!
De AA1IK
Ernest Gregoire
Armed Forces Crossband Opportunities
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| Courtesy: http://swldx.us/blog/ |
Each station has a slightly different operating schedule and full details of operating times and crossband frequencies can be downloaded from here.
In addition to the usual SSB / CW modes, this year will see several digital modes such as MT63, AMTOR FEC, as well as two new modes ... MIL-STD and ALE.
The needed MIL-STD (Serial PSK) software can be downloaded for free from MS-DMT software.
The activity gives hams and SWL's the chance to exercise their technical and operating skills. All stations will provide a special QSL for contacts made or for reports of reception.
Join the fun and gather some unique wallpaper at the same time ... not many hams have a QSL from 'WAR' on the wall!
