The Audio Pages

This page has links for all download files available from The Audio Pages.  There are not many, but the ones here are all very useful.

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Stores - Small Business & Hobbyist Stock Management
Cron - Windows Job Scheduler
Discrete transistor data
Heatsink thermal rating calculator
International Rectifier thermal application note (AN-1000)
Linkwitz-Riley crossover calculator
Linkwitz transform calculator
Multiple feedback bandpass filter calculator
Passive Crossover Design Spreadsheet
Theile-Small Parameters Spreadsheet
World Time Clock

Datasheets (links to component search engines only)

STORES - store.exe (Self extracting archive - 29,948 bytes)  The Stores program was written to replace my old stock management system, which was past its use-by date.  Stores is a basic but extremely useful stock management program, that allows small manufacturers, repair shops and hobbyists to maintain a full database of all the parts they normally use.  It is not limited to electronics, and can be used with anything, from tools, car parts to spares and finished goods in any industry.  The version here is limited to a single database of 250 entries in a single database file, and has no reports (although the menu items are still there).

The program may be registered, which will get you a CD-ROM and unlimited downloads of updates and additional functionality.  The full version supports unlimited database size, 5 separate database files, stock value and re-order reports, with more to come.

Both versions of the program have extensive help, and use a simple text database format.  Even without indexing, a search on a 32,000 record database takes about 2 seconds on a Pentium 666MHz machine.

Registration is US$29.00, and includes the CD-ROM, with the latest version and as a bonus also includes the ESP construction articles in both HTML and PDF format.  The CD-ROM also contains the key to unlock future downloads.

CRON - cron.exe (14,428 bytes - self extracting archive)  Very simple but useful job scheduler for Windows^TM machines, and it has nothing to do with audio.  Ideal for PCs or servers to schedule network backups (via a simple batch file), or to run other programs at the selected time(s).  Can control up to 10 scheduled jobs.

ESP-SEMI - esp-semi.exe  (37,735 Bytes - self extracting archive)  This is a small program to find transistor data.  Not everything is listed (1442 different devices).  Download a copy, place it into the directory of choice and run the program, which is a self extracting archive.  There are two extracted files - ESP-TRAN.EXE and BIPOLAR.TXT, being the executable and database respectively. ESP-SEMI.EXE may be deleted after extraction unless you want to give a copy to someone else.    New stuff can be added as you find the data.  If you add a lot of stuff, feel free to e-mail me a copy of the new database (compressed, please!), and I will add it to the database file.

For users who eschew Windows, the text file is still useful, as it can be read with any text editor or even a spreadsheet (TAB delimited format).  Be careful with spreadsheets, as they like to try to convert some data into dates (really useful).

ESP-LR12 - esp-lr12.exe (66,560 bytes)  Version 1.2 supports both 24dB/Octave and 12dB/Octave Linkwitz-Riley filters for greater flexibility and more options for the constructor.

Please note that the executables are 32 bit, and need VB40032.DLL to run.  This should be in your \WINDOWS\SYSTEM directory.  Sorry, but the programs are only available for Windows95^TM or above.

LINKXFRM - linkxfrm.exe  (54,723 bytes, self extracting zipped archive)  An updated version of the excellent Linkwitz Transform spreadsheet from True Audio (www.trueaudio.com).  This has had additions from Dean Canafranca (one of my readers) and I added the ability to use litres or cubic feet in the new section.  This is reproduced with the kind permission of True Audio.  The spreadsheet is in Microsoft Excel format, and is zipped to reduce the download time.  (Unzipped size is 124,416 bytes.)

TERMS AND CONDITIONS:  The Linkwitz Transform spreadsheet is the intellectual property of True Audio, and permission to re-publish or otherwise distribute the program may be granted only by True Audio.

an-1000.pdf (54,462 bytes)  This application note from International Rectifier ("Mounting Guidelines for the SUPER-220") is a most excellent source for further information on transistor mounting.  It is somewhat specific in some areas, but the basic information is very good indeed.  Recommended reading.

The links below are your best source of datasheet downloads (for Questlink you need to create a login, but it's free - they just want to know who you are, and PartMiner requires a download from their site).

Wonderful search engines to locate parts.  Highly recommended.
 

	EE Design Center/ Chipcenter - Your best source for component data sheets - the best I have found !
	PartMiner - Simple and free - searches the web for components.  This has saved me a lot of anguish!

NOTE:  Product Specification Sheets are Copyright (c) of their respective publishers / manufacturers and these links are provided as a service to readers.  Any inclusion of a specific link or reference to a particular manufacturer's data sheet(s) does not imply any affiliation or preference for that manufacturer unless there is a technical reason to do so, or no similar device is available from any other manufacturer.

Copyright Notice. All material described, including but not limited to all text and diagrams, are the intellectual property of Rod Elliott unless otherwise stated, and are Copyright  1999-2000. Reproduction or re-publication by any means whatsoever, whether electronic, mechanical or electro-mechanical, is strictly prohibited under International Copyright laws. The author / editor (Rod Elliott) grants the reader the right to use this information for personal use only. Commercial use in whole or in part is prohibited without express written authorisation from Rod Elliott or the identified copyright owner.