Here is a representative sample of comments I have received so far. Anything which might identify senders has been removed in the interests of privacy. Also remember these comments come from people all around the world. Their grasp of English astonishes me because the only other language I can speak is "Australian" .
Comments: Great work Ian, keep up the good work. I am finally finding time to read the tutorials,now that i have d/ loaded them. Being an amateur "HAM" I find them great to "refresh" the old brain,& recap on things forgotten.Laid out in plain english - - - good stuff 5/5.
73's from john
Comments: Hello Ian,
I am a practicing engineer and even I found some of my basic concepts cleared.
Thanks for your effort.
Comments: Very Informative. I'm an Aircraft Engineer and wanting to remuster into an electronics trade. I'm very Technical, and Computer Oriented, and would like to learn more about the subject. Thank you for letting me browse your site. Everything helps.
Comments: First of all I would like to extend my profound thanks and appreciations for your genuine efforts to design a such valuable, educational and helpful webpage. It has been the most helpful web site in my electronics reseach.
I am an electronics student in Toronto, Canada. This semester I had a project to design a power supply of -/+ 15 volt and 300mA. The project was a challenge to me in the beginning, but thanks to God for the power supply documentations on your web site; it gave the most important clue to start my project. I finished the project with excellent testing results. Once again thanks for the web page.
I have another the second project to design a telemetry system which collects data of temperature, wind speed and direction. The system should be able to transmit the collected data to a receiver which decodes the data and displays it on the screen. I would be very thankful to you if you could please give me a point where to start from because I have no idea about telemetry.
Comments: Excellent site, both this and your other one. I greatly enjoyed your tutorials as a brush up on my theroy (Has been 40 years since I started) and help in beginning to design projects of my own.
Well as you suggested I am writing you a piece of mail after completeing the second part of your Amplifier design tutorial.
First let me say that I found this very informative. Amplifiers have always eluded me. Even in highschool when I was learning about them in electronics class, they were still puzzling. This probably had something to do with the fact that I was asleep during that chapter;)
Anyway, I'd like to applaud your approach in the tutorial. It's very down to earth, and consise. Its not very heavy on the math. As soon as I seen that you were using readily available and cheap parts in your examples, the proverbal clouds parted and a ray of hope, reached out, smacked me in the head and said "Hey, stupid don't pass this opurtunity up!" ;)
I fully plan on going home tonight and experimenting with your methods, as well as reading through your other stuff on the same page when the opportunity arises.
Thanks for your time. But most of all thanks for making things like this a little simpler for guys that like to tinker but don't have the capacity or the patience to wade through the math.
Comments: Neat refresher course.
Comments: Great stuff, I will use some of it for our Science class (9-12 Special Ed students with emotional/behavior challenges). Also, are you familiar with project Radio JOVE for Radio Astronomy? They have a 20Mhz receiver project and online radio telescope.
Comments: Thank you for a great site. Being the training officer for a telecomm's company here in Zimbabwe, I am very fortunate to have found it. Many thanks,
Comments: I have a burning question that I hope someone can answer, because the 'BIG GUNS" I HAVE TALKED TO CAN'T.
Namely, what constitutes an "RF choke?"Can those little inductors found in quantity in TVs and computer monitors be used as RF chokes? How can you tell? These inductors measure less than 1 uH to over 10 mH, have resistances of milliohms to several ohms and appear to be wound on a ferrite core of some sort (NOT A TORROID, BUT CYLINDER AND BOBBIN SHAPED). I HAVE
ACCESS TO LOTS OF TEST EQUIPMENT I CAN USE TO DETERMINE THE PROPERTIES OF "CHOKES". in addition, some of these inductors have a small disk-shaped permanent magnet attached to one end of the core. Pulling off the magnet makes the inductance of the coil increase. Whats the purpose of the magnet? THANX. TED
Comments: I enjoyed reading your tutorials. I am just starting out my hobby in amateur radio and I am eager to learn more about the electronics involved. Thanks for your web-site.
Comments: May have some later after I check out the tutorials. I admire your dedication!
Comments: The site is excellent.
Comments: Great web site. Look forward to visiting often. A wealth of valuable information.
Comments: THANKS FOR THE HELP WITH THE COOLING FAN PROBLEM
Comments: great topics on tutoring infomations..thanks for the hard work..you must be retired to have time for the web..73
Comments: Hi Ian. Just browsed through your tutorials a bit. Got it bookmarked for later reading in depth.
Thanks for creating this.
Comments: Great web site. I really enjoyed it. It has everything that I want to learn about.
Comments: Just writing to say thanks. This site is great. Nice to see something that starts off at a basic level. Most electronic sites just assume you know how everything works already, and are often quite difficult to understand.
It'll be nice to finally be able to understand a few of the concepts which are normally taken for granted.
Comments: I am enjoying reading the articles.
Comments: Hello, Ian! I've been reading your excellent letter for some time -- a great job and some wonderful info for electronic buffs, young and old. I've been hamming for 46 years and still learn a lot from your tutorials. I'm a freelance writer/editor with 30 years experience -- would like to write more about radio/electronics. Maybe you can use my alleged talent? Keep up the great work, Ian. It is much appreciated!
Comments: Looks like a great site to increase in learning. Thank you! Yes, will try your newsletter.
Comments: This site it's great! It's the only place, up to now, where to find some docs about phone lines and specifics! Thanks!
Comments: Nice, well layed out, informative site, keep it up.
Comments: Its some good stuff!
Comments: keep it up!
Comments: From what I have seen things look quite complete and on going. What I need some help on is decibels and vectoring.
Comments: yes,I'm interest in two newsletter per month.the latest web page format is excellent and very friendly in locating infomations..73 mate
Comments: THANKS FOR THE NEWSLETTER IAN. HAVE BEEN A HAM SINCE 1940--Kxxx--I USE 10 AND 15 TO WORK AUSTRALIA. VISITED THERE LAST YEAR. GREAT VISIT. BEING AN OLD HAM AT 78, I AM RUSTY ON SOME THINGS AND USE YOUR TUTORIALS TO BRUSH UP. YOUR ARTICLES ARE CLEAR AND EASIER TO STUDY THAN TEXTBOOKS. YOU GET RIGHT TO THE POINT. HAVE WORKED IN ELECTRONICS ALL MY LIFE AND RETIRED FROM XXXXX NATIONAL LABORTORIES IN '85. ONCE A MONTH FOR THE LETTER IS FINE FOR ME. KEEP UP THE GOOD WORK.
Comments: In fact before the month comes to end, I really expecting your letter every month. Thank your for your wonderful work.
Comments: kindly add to your site the digital synthesizers as well, some articles of modern techniques like frequency hopping etc.
Comments: Well; After many months I've finaly found your tutorial web site. I had thought that your news letter was supposed to be the tutorial, and was getting very disapointed waiting for the lessons. Anyway, I've found out where it is now, from your last newsletter. Thank you, Ralph
Comments: Ian, Thanks for a realy great site. It is one I keep comming back to firstly to see if there is anything new and secondly because it is a wealth of information.
I am a radio ham, Callsign ZXXXX, and use your site's information regularly as a source for information to help myself and others understand the wonderfull and exciting hobbies of radio and electronics. Your efforts to disseminate information as interesting and as powerfully as you do is realy appreciated.
Comments: I found your site on the net and found your tutorials very good. Looking forward to seeing the newsletter.
Comments: This Is really a wonder full site for Indian students who cannot afford costly books......
Comments: love the site great layout and easy to access and understand, I'm currently studying electronics in college and love it. Thanx for the neat projects you can supply they are great fun and do-able and keep me interested.
Comments: Sir, How are you? Thank you very much for your website. Your website helps me to understand more about electronic design. I wonder if you can dicuss more about sensor,alarm and data transmitting (wireless).
Comments: Very nice site.I have not been getting into radio lately, but we have begun studying networking at TAFE, and the theory is very similar to what I taught myself whilst practising my radio hobby. Is Wireless networking just an upgrade (so to speak) of packet
radio ? My interest in your site is for both personal and professional reasons. Thank You.
Comments: Ian,thanks for providing this info to others of us. Hope to work you some day.
Comments: You are doing too good things!
Comments: You have a great site I enjoy it very much. Have you heard of a foxhole radio It's built like a cyrstal radio but instead of a diode as a detector they use a pencil lead tied to a pin that touchs a blue blade box cutting type blade I read an article about how
soldiers made them in the war. I made one about 15 years ago and could hear AM broadcast stations through a crystal earphone. It was simple but amazeing little project.
Comments: Pleased to see your article on the construction of a Radio Telescope! I am interested in any relevant info. I am also looking for plans to build a paper chart recorder?
Comments: Keep up the good job!!! thanks a real lot for the projects and the tutorials!!
Comments: Wonderful find! I'm just getting into Ham radio, and renewing my interest in electronics. Thanks for the great tutorials.
Comments: Love your site. I'm 16 a computer programmer and I have skills with electronics but was never formally taught and I think your site is cool!!!
Comments: this is a great site Ian full of valuable information for the electronic hobbyist and radio ham keep up the good work. I'm sure it is much appreciated. 73s alan
Comments: Your tutorials are a very nice refresher course!
Comments: Thanks for the hard work and effort that you've put onto this site. I think it will be a great help to me in the future.
Comments: Your site is of real value to a non-engineering type person. It has practical info. I've added you to my favorites list. My background is Electrical Eng. but have been a web developer creating great tools for the web.
Comments: Your work is interesting and educative which is good for any mind who love development initiative.
Comments: Please keep up the fine work on informing folks on the science of radio!
Comments: Thanks for providing this useful tutorial. I have not been able to fully realize the benefits of it as there have been time constraints. My main interest in filters lies in the FM broadcast band. I live very close to many FM radio stations and need to give my front end a little extra assistance in keeping unwanted locals from producing unwanted mixing products. I have also considered the approach of using cascaded notch filters in individually knocking down the levels of the locals. Once again, thank you for a nice resource.
Comments: Hello Ian, First of all a very happy new year, with a lot of qrp, operating and electronics fun.
I just read your tutorial on the class A amplifier. It is very well written, and very understandable for someone who does not have an electronic background.
I am very keen on learning how to design and build electronic projects especially for qrp. Most of the "classic" electronic studybooks are already on my bookshelf. Many of them are first class reference literature but are not very good in explaining theory and lack that pedagogical approach. I wish they had your style of writing!
I've given up putting any more in because it's a daily event, becoming repetitive and would bore you to tears.
Ian Purdie - VK2TIP 1st January, 2001
the author Ian C. Purdie, VK2TIP of www.electronics-tutorials.com asserts the moral right to
be identified as the author of this web site and all contents herein. Copyright © 2000, all rights reserved. See copying and links.
These electronic tutorials are provided for individual private use and the author assumes no liability whatsoever for the application, use, misuse, of any of these projects or electronics tutorials that may result in the direct or indirect damage or loss that comes from these projects or tutorials. All materials are provided for free private and public use.
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Updated 1st January, 2001