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- ║ The K B 2 B K DX Locator ║
- ║ ───── ║
- ║ Copyright (c) 1990 ║
- ╚══════════════════════════════════╝
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- What the Heck is it?
- ────────────────────
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- In brief, the DX locator is an easy-to-use program which
- allows you to quickly determine beam headings and distances
- to countries all over the world.
-
- The program is flexible. You can enter the callsign prefix
- from a station you hear on the air, and before you lift your
- finger from the Enter key, the country's name, heading and
- distance appear on the screen. You can also enter the
- country's name and retrieve the prefix, heading and distance.
- If you are in the mood to browse, you can take a page your
- way through the entire database just to see what's there!
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- How do I run it?
- ────────────────
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- You can run the program from a single floppy disk drive or
- you can install it on your hard drive. The entire database
- is read into your computer's memory when you run the program;
- so other than convenience and shorter load time, there is no
- particular advantage in fixed disk operation. Run the
- program from any drive you wish.
-
- To start the program, type DX <Enter>. (Make sure all the
- files are resident on the same drive you start DX.EXE from).
- A title screen appears and the program waits for you to press
- a key. After your keystroke, it will take a few seconds to
- load the database into memory.
-
- When the program's operating screen appears you will notice a
- small (6 character) field near the lower-left corner. All
- communication with the program is done through this box. You
- can exit from the DX Locator by typing "STOP", "QUIT" or
- "END" in the box.
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- Searching in the Prefix Mode
- ────────────────────────────
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- You can be as specific as you like when you initiate a
- search. But remember, if you are too specific the program
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- may not be able to match a prefix with your input. If you
- are not specific enough, you may get extra output that you
- will have to "wade" through to find what you really want.
-
- Let's look at an example. Suppose you hear a station with a
- UK5 prefix and decide you would like to answer his CQ. Any
- self respecting "DX hound" would know he was most likely
- listening to a Club Station in the Ukraine. But you would
- like to be precise when you rotate that 5-element pigeon-
- perch, wouldn't you? QSL!
-
- Here are some possible entries you might make from the Prefix
- mode, and the results:
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- You type DX Locator's output
- ───────────────────────────────────────────────────────
- <Enter> The entire database (paged)
- U <Enter> All prefixes beginning with "U"
- UK <Enter> All prefixes beginning with "UK"
- UK5 <Enter> UK5 - The Ukraine
- UK5XX <Enter> (No match found)
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- Note that the UK5 you seek is present in each of the first 4
- entries.
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- Searching in the Country Mode
- ─────────────────────────────
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- Press F2 to put DX Locator into the "Country Mode". Ok, you
- are ready to go. But wait! How can long country names be
- entered in a field only 6 characters wide? Frankly, 6
- characters is enough information to zero-in on most
- individual countries. But, in the Country Mode ALL of the
- prefixes associated with the country will also be included in
- the output.
-
- Let's search for the Ukraine as we did above, except we will
- initiate the search from the Country Mode.
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- You type DX Locator's output
- ───────────────────────────────────────────────────────
- <Enter> The entire database (paged)
- U <Enter> 25 countries beginning with "U"
- UK <Enter> The Ukraine
- UKR <Enter> The Ukraine
- UKRA <Enter> The Ukraine
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- In this case, you only needed to enter a couple of letters to
- find the target country.
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- NOTE: If you accidentally press <Enter> in either mode and
- dump the entire database, you do not have to page your way
- through all of the data. Press <Esc> to terminate paging.
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- Date and Time Display
- ─────────────────────
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- A few words about date and time in the lower-right corner of
- the screen. When you start the program, the date and time
- are retrieved from your system. (If you do not keep correct
- time on your system then the display is useless). The time
- element is converted to GMT or Zulu time offset from Eastern
- Standard Time. During the summer months the offset changes
- by 1 hour since the local clocks are pushed ahead.
-
- You can show the correct GMT while EDT (E. Daylight Time) is
- in effect by pressing F3. Pressing F3 reduces the GMT offset
- by 1 hour.
-
- Please note that the date displayed is ALWAYS the local
- system date, NOT the date associated with GMT. Between the
- hours of 00:00Z and Midnight (local time) the date displayed
- is actually 1 day BEHIND with respect to GMT.
-
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- The Browse Mode
- ───────────────
- As you have probably realized by now, the DX Locator has a
- value beyond that of simply supplying beam headings. It is a
- source of general information. Indeed, a DX'er running an
- omni-directional antenna system or even an SWL will find the
- program useful in rapidly identifying countries and making a
- determination where the countries are located. Using the
- program may not exactly plot the location of Fletcher
- Christian's doorstep, but it will lead you to the correct
- ocean!
-
- Press F4 to enter the Browse mode. Now you can use the data
- as a look-up table. When you start browse you will be
- positioned at the first 10 records. You can use the cursor
- keys to scroll through the data one record at a time. Using
- the "Page Up" and "Page Down" keys will move you through the
- data 10 records at a time. Pressing the "Home" key will
- return you to the first 10 records while pressing "End"
- advances you to the end of the data. Don't get too dizzy!
-
-
- The Data File BEARING.DAT
- ─────────────────────────
-
- The data found in BEARING.DAT assumes a station position near
- the center of New York State. Considering the angle of
- optimum radiation of the typical directional HF antenna, the
- headings given should produce acceptable results if your
- station location is in the northeastern U.S. If not, my
- apologies. Calculation of these headings is beyond the scope
- of my intentions for this program.
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- The beam headings given are to the geographical centers of
- the target countries. In the case of a large country which
- is also close, such as Canada, you will need to keep this in
- mind and compensate as needed.
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- The distances given are calculated in statute miles. Any
- distance represents the shortest distance (great circle) from
- MY location to the geographical center of the target country.
-
- The file itself is a sequential, ASCII file. It can be
- edited with any text editor or word processor with the
- capability of ASCII output. You may edit the data file for
- the purpose of adding new countries, deleting old countries
- or optimizing the direction and distance data. The only
- caution I offer is to maintain the column format exactly as
- it is. To change the format will cause the data to be
- misaligned with the program's template.
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- The organization of the file follows, more or less, the order
- laid out in the ARRL DXCC Countries listing. If you choose
- to add a new country, for convenience sake I suggest
- insertion of the new country into a prefix block
- alphabetically. I suggest this because you can print-out the
- data file and use it as a handy desk reference or a DXCC
- checklist, perhaps. If the data is organized alphabetically
- by prefix, you will find countries easily. In terms of
- program function, however, the order of the data makes no
- difference. Each time a search is initiated, the entire
- database is scanned regardless of the number of matching
- records that are found.
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- Function Key Description
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- F1 - Displays a Help panel.
- F2 - Toggles between Prefix [Default] and Country mode.
- F3 - Toggles Daylight Savings Time Off [Default] or On.
- F4 - Enter Browse mode. <Esc> to exit Browse.
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- Why'd ya do it?
- ───────────────
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- I wrote this program for a number of reasons. I sensed a
- need. I like Hams. I like DX and appreciate the ART of
- being a successful DX chaser. (DXCC/CW #1011). I always
- wanted to get my hands on something that would give me this
- kind of information, this fast. I like to "play" with
- computers. It seemed like a worthy application. I felt an
- urge to give something back to the hobby that has given me so
- much enjoyment. So, why not?
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- The License (Oh yeah!)
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- You are granted a license to use this program, as long as you
- wish, without monetary obligation. You may make as many
- copies as you need. You may distribute copies to other Hams.
- You may post this program and associated files on Bulletin
- Board Systems.
-
- I only ask that you include all files, including this DOC,
- with any copies you make. In addition, please do not alter
- or attempt to reverse-engineer the program or any of the
- support files. (You may edit the BEARING.DAT as outlined
- above). I do retain Copyright.
-
-
- A Parting Shot
- ──────────────
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- For those of you whom might be interested, the program was
- written in Turbo Pascal 5.0. It was fun to write and debug.
- I was not able to test it on all conceivable system
- configurations but I believe you will find it a well-behaved
- little program. I hope the DX Locator will be useful to you
- and find a comfortable home on your system. Enjoy!
-
- Comments are welcomed. I'm good in the CallBook!
-
- 73,
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- KB2BK
- Bob Joy
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