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Javascript® Electronic Notebook

by Martin E. Meserve





Toggle
Resistance
Toggle
 *  
 * Resistance
 * Basic
 * Serial/Parallel
 * Custom/Precision
 * Ohm's Law
 * Kirchoff's Law
 * Attenuators

Capacitance
Toggle
 *  
 * Capacitance
 * Series/Parallel
 * Custom/Precision
 * Standard Value
 * Plate Cap
 * Cylindrical

Inductance
Toggle
 *  
 * Inductance
 * Air-Core Design
 * Air-Core Calculator
 * Optimum-Q
 * Multi-Layer Calc
 * Toroidal Inductors
 * Toroidal Cores
 * Straight/Flat Wires

L / C / XL / XC
Toggle
 *  
 * L / C / XL / XC
 * Reactance L/C

Power Supplies
Toggle
 *  
 * Power Supplies
 * Basic PS Design
 * Unregulate PS
 * Zener Regulation
 * 78xx Voltage Reg
 * LM317 Voltage Reg
 * System V-Drop

Filters
Toggle
 *  
 * Filters
 * LC Low/High Pass
 * 2/3-Way X-Over
 * LP/HP 2 Act
 * Band Pass 2 Act
 * 30 Second Designs
 * CW Filtering
 * Ten-Tec CW Filters
 * IC-730 IC-EX203
 * HF/VHF LP

Antennas
Toggle
 *  
 * Antennas
 * Freq/Wavelength
 * Element Lengths
 * Frequency Scaling
 * HF Wire Ant I
   Toggle
    *  
    * HF Wire Ant I
    * End Fed Antenna
    * Half Wave Dipole
    * Shorty 40
    * TFD, T2FD, BBTD
    * ES2B Dipole
    * Linear Loaded
    * Short Dipole
    * Short Dipole Equ

 * HF Wire Ant II
   Toggle
    *  
    * HF Wire Ant II
    * Short Multi-Band
    * Fat (Broadbanded)
    * Coax Trap
    * Folded Dipole
    * Inverted-V
    * Full/Half-Sloper
    * 160 Meters

 * HF Ant Other
   Toggle
    *  
    * HF Ant Other
    * Yagi (2-6 El)
    * 2-El HF Yagi
    * 3-El HF Yagi
    * 2 & 3-El Matching
    * Loaded Vertical
    * 4/5BTV Vertical
    * DXE Thunderbolt
    *  
    *  
    *  
    *  
    *  

 * VHF/UHF
   Toggle
    *  
    * Ant - VHF/UHF
    * Aircraft Band
    * J-Pole
    * Ant (Basic)
    * Yagi (Hi-Gain)
    * Yagi (Quick)
    * Yagi Feed
    * Yagi Help
    * UHF/VHF Ant Amp


General Info
Toggle
 *  
 * General Info
 * Wire Size Info
 * Wire Dia/Area
 * Conversions
 * Equivalent Values
 * Fraction/Decimal
 * Amateur Privilages
 * Tech Privilages
 * Q-Signals

Miscellaneous
Toggle
 *  
 * Miscellaneous
 * Morse Code
 * CB Channels
 * Audio Amps
 * Audio Extras
 * TTL List
 * Lissajous
 * Xmtr Blocks
 * Multivibrators
 * RMS/Peak/P-P
 * MI 2M Repeaters

Projects
Toggle
 *  
 * Projects
 * L-PI-T Tuner
 * Ind. Meter
 * Key/Audio Switch
 * IC-255A Comp Ctl
 * IC-735
   Toggle
    *  
    * IC-735
    * Digital Modes
    * ICOM CI/V
    * ICOM SM-2 Mic
    * IC-735 Failures
    * Ext. SWR
    * Rear to Front
    * Open TX
    * 6 Meter Spurs

 * Ameritron RCS-4
 * Shack Audio
 * Shack Shelving
 * RS Ant Rotator
 * McGohan MS 103
 * 80 M Receiver
 * Keyers
   Toggle
    *  
    * Keyers
    * Discrete Keyers
    * Simple Keyers
    * Touch Keyers
    * CW Speed
    * CW Memory
    * Keyer Extras
    * Straight Key
    * Commercial
      Toggle
       *  
       * Commercial
       * Heathkit HD-1410
       * MFJ-482B
       * CW Sendin' Mach
   
    * Home Brew
      Toggle
       *  
       * Home Brew
       * Accu-Keyer
       * Accu-Keyer CMOS
       * AI2T Memory Keyer
       * ICKEY
       * Keyer Magic
       * Code Generator
       * Micro-TO Keyer
       * Mini-MOS
       * Triambic Keyer
       * Versa-Keyer

Vintage Comp
Toggle
 *  
 * Vintage Computers
 * Overview
 * MEK6800 D1
   Toggle
    *  
    * MEK6800 D1
    * Description
    * User Manual
    * Mem Expansion
    * MC6820 PIA
    * Review

 * EPA Micro-68
   Toggle
    *  
    * EPA_Micro_68
    * Description
    * User Manual
    * Schematic
    * RAM Expansion
    * Cassette Adapter

 * Cross Assembler
   Toggle
    *  
    * Cross Assembler
    * Manual
    * Pseudo Ops
    * Summary
    * Tables

 * Notes/Specs
   Toggle
    *  
    * Notes/Specs
    * Eng Note 100
    * RTF File Gen

 * Software
   Toggle
    *  
    * Software
    * User Group Lib
    * CW Send
    * Morser
    * EProm Prog
    * Morse Machine

 * Hardware
   Toggle
    *  
    * Hardware
    * Prog Sound Gen
    * CW Message Gen
    * Cassette Int
    * RAM Expansion
    * Single Step/DMA

Sym_Lib Docs
Toggle
 *  
 * Sym_Lib Docs
 * jsDraw2D Doc
 * Sym_Lib Intro
 * HTML Colors/BGs
 * Pens/Colors
 * Generics
 * ICs
   Toggle
    *  
    * ICs
    * Analog Dev
    * Logic-TTL
    * Logic-CMOS
    * Logic-Misc
    * µ-Computer

 * Wiring
 * Switches
 * R-L-C/Parts
 * Connectors
 * Physical
 * Semi-Cond
 * uComp
 * Tubes
 * Flow Chart














NEW MENU!

If you have been to this site before, you might have noticed that the menu on
the left side of each page is gone. The menu is not really gone. It has just
been replaced by a menu that is easily manipulated by a mobile device. Note the
symbol in the upper-left corner with three horizontal hash marks. In the
computer world this is know as a "hamburger" and is commonly used to indicate an
option menu on cell phones and devices with touch screens. The "hamburger" is
used to access the top level of the menu. It also is used to back out of a menu
selection.

When activated, by touch or mouse click, the "hamburger" will move to the right,
about 200 pixels, and a top level menu will be displayed, between the left edge
of the page and the "hamburger". Menu entries that have a right facing arrow
next to them are section headings and contain other menu items. Clicking on
entries without a arrow will take you directly to a page. There may be other
section headings under some of the top level headings.

It took a lot of work to replace the original menu with this new one. And, there
have been a lot of updates to my drawing library. So there may still be some
pages that are not fixed.


INTRODUCTION

The main focus of this site is what I call my JavaScript® Electronic Notebook,
accessable from the menu on the left. It consists of a group of JavaScript®
driven web pages that are intended for use as a quick reference for Amateur
Radio operators or just anyone interested in electronics. Use the popup menu bar
on the left, to access any one of my pages.

This web site does not use Java, Flash, or any Active-X controls. However, it
does make extensive use of Javascript®. If you get a warning about restricting
this web page from runing script, you will need to click on "Allow blocked
content". Or, in the "Options" menu, you will need to allow JavaScript®. If you
don't, nothing on my web site will operate, including the menu. Javascript® is
used for operating calculators and rendering drawings. There is nothing in the
Javascript® that would cause any problems.

Except for that small icon that alternates between "Best Sites" and "AFS
Analytics", there is no advertising on my web site. That small icon is just a
way for me to collect statistics on my web pages. Beyond that, there shouldn't
be any annoyances. I fund this web site completely on my own.

It is now the year 2024. I started my web site on June 5, 2004 and has it
evolved as time moved on. What you see now is a rewrite. I rewrote the entire
web site for many reasons. My original web site seemed to work well, but it was
a little problematic for maintainance and adding pages. So a much simpler format
has been adopted.

Note: Even though this rewrite is not complete, I am publishing it anyway. It
has be come too big and too clumsy to keep in a test mode. So you may find some
pages incomplete and other still in the old format. I am still working on the
site but I don't have any real finish date. Part of that is because I get an
idea for a new page, and get distracted. My original web site will be available
for a while, but as new pages are completed, redirect pages will take their
place.

Conventions Used: To keep consistancy between pages, there are certain
conventions that I have adopted.

 * Calculate Buttons: While all of my pages perform some kind of calculations,
   there are no buttons that say "Calculate" on any of my pages. Each time you
   change a input, and then click any where else on the page, the entire page is
   recalculated. This may seem like a lot of calculating, but even the most
   complicated of my pages recalculates in a fraction of a second and is not
   noticable.
 * Input Data: Input data is prompted for using HTML <input> tags. Often there
   are cases when some <input> data is not required, fixed, or simply not
   wanted. In those cases the <input> will be "grayed" out. User input will be
   disabled.
 * Output Data:
 * Data Dimensions:



Browser Compatability: When I write my web pages, I use Google Chrome as I am
developing. Then, from time to time, I go back and check the operation of my
pages with Internet Explorer 11, Firefox and Edge. All of which are usually the
latest versions. Beyond that, I don't do any other testing. During development,
the most problematic browser has been Internet Explorer 11, but I think I have
figured out most of my issues. I have found that Internet Explorer 11 errors out
on some relatively simple Javascript constructs. However, Since Microsoft is
trying to replace IE with Edge, all of my compatability efforts might be in
vein.

Printing: Most of the pictures on my site are not pictures at all. They are
drawings that are created dynamically, when the web page is loaded. However, if
you try to print some of the drawings, like schematics, you might discover a
problem with the text being offset. The offset causes some of the drawings to be
unreadable. I have tried Chrome, Internet Explorer 11, Firefox and Edge and they
all do the same thing, just to different degrees. The only effective way I found
to print say, one of my schematics, is to do a Screen Capture with IrfanView. I
tried other tools for a screen capture but they didn't work. But, I don't have
the time, or inclination, to do an exhaustive search of every Screen Capture
tool available.

IrfanView is a free graphics tool that contains, among other things, the ability
to do a Screen Capture. Once the image is captured, the background color can be
removed/changed. Removing or changing the background color must be done before
the captured image is saved.



Copyright © Martin E. Meserve, K7MEM Copyright © 2004 - 2024 - All Rights
Reserved