Electrical Calculation Program

[KD0BQM]

I have just come across a free program that does it all. Anyone who HB's needs this program. Check it out!!!

Linky (http://www.miscel.dk/MiscEl/miscel.html)

[WA7KKP]

Thanks but no thanks. I have a copy of the Reference Data for Radio Engineers, along with several books with all the formulae needed.

Then I use pencil and paper. Pen . . . if I can find one that works . . . !!!

Gary WA7KKP

[W0LPQ]

Gary, the RDRE is one of the best books out there. I gave mine to my kid ... who sold it ... then decided to pursue his EE degree. Never have forgiven him for selling the book..!

0BQM if you don't know to apply the formula and where they should (or would) be used, the data is worthless.

[kl7aj]

Quote[/b] (WA7KKP @ Jan. 11 2008,10:55)]Thanks but no thanks. #I have a copy of the Reference Data for Radio Engineers, along with several books with all the formulae needed.

Then I use pencil and paper. #Pen . . . if I can find one that works . . . !!!

Gary WA7KKP
I never turn down free software. But I always have my RCA Radiotron Handbook handy too. http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif

eric

[K5UOS]

I personally have enjoyed a different direction common to many homebrewers.

I developed (over 20 years) several worksheets (one workbook) of all/most of the calculations I use to design a receiver, transmitter, antenna, etc.

I have sheets to design double and triple tuned bandpass, low/high pass, L-C-C filters and other passive and active filters

I have a sheet for 50ohm feedback amps or simple calculations such as turns on a particular toroid core for a needed inductance.

I can design butterworth crystal filters up to 6 pole on another sheet and calculate the results from the output of my homebrew L/C and logarythmic power meter in another.

It helps to learn the processes and the math if you actually "program" the formulas into a speadsheet.

You can do lots of what if calculations for IF frequencies and filters and you quickly get the characteristics you want while keeping the design to standard values.

Hand calculating is just not an option for some things.

The sites available like the one addressed here are great. #I use one in particular for the Butterworth low pass filters http://www.pronine.ca/links.htm

But I expect many homebrewers do what I have done and tailor make spreadsheets for design and analysis.

The book EMRFD (W7ZOI) includes a CD with very powerful design software. It is at the circuit level not the component level.

Eric, I also have my RADIOTRON DESIGNER HANDBOOK handy right next to me. I have used it quite a bit this month regarding tube mixers and noise.[U]

Quote[/b] (kl7aj @ Jan. 11 2008,11:14)]Quote[/b] (WA7KKP @ Jan. 11 2008,10:55)]Thanks but no thanks. I have a copy of the Reference Data for Radio Engineers, along with several books with all the formulae needed.

Then I use pencil and paper. Pen . . . if I can find one that works . . . !!!

Gary WA7KKP
I never turn down free software. But I always have my RCA Radiotron Handbook handy too. http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif

eric
Eric you always have great comments. I also will never turn down free software even though I have commercial software at my disposal.

As for books I will see your RADIOTRON Designer's handbook (3rd edition 1945) and raise you Relay Engineering (Struthers-Dunn first edition 1945).

73,

Frank http://www.qrz.com/iB_html/non-cgi/emoticons/biggrin.gif

[K5RCD]

Great program Hugh.

Thanks for sharing. #http://www.qrz.com/iB_html/non-cgi/emoticons/cool.gif

[K8ERV]

If it isn't in the RDRE or the CRC handbook, you don't need it.

TOM K8ERV Montrose Colo