Gregs Basic Electronics

OF ELECTRONIC TABLES & FORMULAS by Martin Clifford

In the introduction to this book, the author notes that there are a number of ways to solve problems in electronics. The first is to use formulas and to plug in or substitute numerical values As the author states,1 This technique calls for some arithmetic dexterity and quite often, a good working knowledge of algebraic and trigonometric functions, and sometimes a bit of calculus. Aside from the work involved, the use of a formula has the disadvantage in that it supphes a single solution/'

The second method of solving problems in electronics involves the use of nomographs which also can give a number of alternative solutions.

A third method is provided in this book by presenting electronics data in tabular form with minimal use of arithmetic. The answers to electronics problems are given immediately in the tables if the elements of the problems are known.

The tables are based on standard formulas used in electronics and provide answers of a much higher order of accuracy than is commonly needed for the solution of electronics problems, The tabies also provide a number of alternate solutions much as do nomographs, allowing the user a choice of practical component values that may be required in circuits.

Of interest to the amateur are tables giving solutions for resistance and conductance involving such things as equivalent resistance of two resistors in parallel, resistance vs. conductance, resistivities of conductors, and design values for three

We are happy to provide Ham Help listings free, on a space-available basis. We are not happy when we have to take time away from other duties to decipher cryptic notes scrawled illegibly on dog eared post cards and odd Sized scraps of paper. Please type or print (neatly!), double spaced, your request on an8J/?"x 1V sheet of paper and use upper- and lowercase letters where appropriate. Also, please make a "7" look fike a "1," not an 'V which could be an "el" or an "eye." and so on. Hard as it may be to believe, we are not fa-miliar with every piece of equipment manufactured on Earth for the last 50 years! Thanks for your cooperation.

I have a Koyo Model JL-451 CCTV camera and need a photocopy of the owner's manual. Also, does anyone have a modification for improving the product detector in an HQ-110A VHF made by Harnmarlund?

Finally I need an SSTV alignment tape. I will copy and return.

Ira Linderman WB2RXR 89 Dovecote Ln.

Commack NY 11725

Help! I need some assistance down here in South America.

First, \ need help in getting the paperwork completed for my local amateur license, i am told that it would be much faster if l types of attenuator networks, T-pad, H-pad, and fl-pad There are tables on voltage and current, capacitance, inductance, impedance, permeability, power decibels, and sensitivity.

If, tor exampie, you require a simple attenuator pad to supply an insertion loss of 40 dB, you can go to the table on Design Values for Attenuator Networks and, for a T-padh locate 40 dB in the left-hand column of the table, Thenl to the right of this value, read the values for R1 and R2, where R1 represents two resistors each having a value of 588.1 Ohms. R2 is shown as having a value of 12 Ohms. The same method can be used to locate desired resistance values for the H-pads and n-pads.

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