This has been my philosophy for almost the last 30 years.

Then I bought an antique radio at a flea market, a Truetone D-911 (the number is chilling), and I began to realign my paradigm.">
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Ozarks Technical College

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"If it needs more than 12 volts to work, it was designed wrong!"

This has been my philosophy for almost the last 30 years.

Then I bought an antique radio at a flea market, a Truetone D-911 (the number is chilling), and I began to realign my paradigm.

I am an electronics teacher. I teach at a technical college in Springfield, Missouri. It is the greatest job I've ever had. I get to play with electronics every day and get paid for it. But I have had absolutely no tube experience. When I learned electronics at Cal Poly, Pomona, mine was the first class (1975) that had tube theory (as a core component) removed from the curriculum. The microprocessor was just becoming accessible, the digital revolution was in full swing, and the bright silicon future beckoned. I have since held on to the mindset that 1970s Cal Poly gave me. Tubes were an anachronism, and silicon would rule the future.

But today I am falling in love with tubes. I can't make an IC in a workshop, but it is possible to create a tube amplifier from a simple automotive light bulb, with equipment that is accessible to the average person. My most inexperienced students can grasp tube concepts if they simply understand the law of electric charges. Try to teach them BJTs and you'll sure experience much frustration!

I bought the Truetone radio for the cool wooden cabinet, but began to be intrigued by the tuning eye and the other circuitry. It is efficient and resilient. I want to restore it, build a simple AM transmitter, hook the transmitter up to my broadband computer, and pipe vintage music (via Spinner) to it. I want to hear the old sounds on the old radio. I'm sure it' ll be the same sounds it made when it was new, when my mom and dad were young. I bet it'll feel great doing it! (is that weird?)

I found this newsgroup, and subscribed. I am amazed at the rich wealth of experience, knowledge, and camaraderie that is in evidence here. I want to learn what I have been missing these last three decades, and pass it on to my students.

My boss, the Division Chair for electronics at Ozarks Technical Community College, retired from the Zenith plant in Springfield shortly after they moved their operation to Mexico 14 years ago. He had worked for Zenith for many years, and has a wealth of knowledge about their radio and TV products in his head. Until recently I looked at him as something of an anachronism, a dinosaur, if you will, with lots of marginally relevant information to impart to his students.

Your group has changed my opinion. I see now that the kind of knowledge he has; the kind of knowledge the members of this group have, can give electronics students a wealth of understanding of electronic concepts and basic principles. And it can make me a better teacher. And it has given me a new respect and curiosity for the knowledge that my boss has after years of hard won experience on the line at Zenith.

I used to be Electronics Dept Head at Sumter Area Technical College in Sumter, SC, for 7 years. It was a great job, but in SC the state expects you to work for nothing because you probably have a military retirement check coming in from Shaw AFB in the town. I had to move on to a little greener pasture (Iranian Air Force contract 1978-79 until the country fell). Teaching is the finest way I ever found to learn electronics. Boy, those kids can ask some tough questions, can't they? But, after 7 years, in 1978, I deduced $14,400 wasn't a living wage....see?

I'm obviously older. Navy taught tubes to me because that's what all the equipment of the time used, except a few new solid state items. That was in the mid to late 60's. I can imagine it was pretty tough when they cut off tubes for a while, but, now, I'd suspect NOT teaching them voltage operated devices (tubes) then UNtraining them so you can teach them CURRENT operated devices (transistors) might have some real benefits....which was always a problem when I was standing at the blackboards.....

Well, welcome to the newsgroup. Tubes and analog electronics is quite simple and that takes some getting used to. You're also MUCH closer to the actual physics the circuit quirks drive you crazy with in tubes over ICs. You'll learn true component level troubleshooting in a hurry around here.......once you get past the capacitor changers.... Larry W4CSC Didn't teach CET. My grads all had FCC 1st phone with Radar endorsements before the GROL nonsense ruined FCC's license reputation. Won't do them much good any more. You only need GROL if you're going to work on Marine or Aeronautical transmitters, now! How wonder broadcasting sounds like crap!

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