What’s new in electronics (1979)

Reblogged from Modern Mechanix.




Digital voice
When this phone-answering machine talks to you, the voice you hear—up to 24 seconds of it—has been stored in a digital memory, not on a prerecorded tape. The technique makes the unit simpler, more compact. Maker: DFG, 3550 Marburg, Frauenbergstr. 35, Germany.
Day/night light
The Sensor Lite never needs to be switched on or off. A built-in light sensor does that by detecting the amount of ambient light in the room. The night light is designed for hallways, stairwells, or nurseries. It’s in local Sears stores for $5.49.

8-track VHF
Plug this cartridge into your 8-track and you’ve converted it from a tape player to a public-service receiver that scans up to four VHF high I low bands for police, fire, and other PS transmissions. Bearcat, made by Electra Co., 300 E. County Line Rd., Cumberland, Ind., is $99.95.

PET add-in
Install the circuit board (inset) into your PET computer and it becomes a spectrum analyzer. Check the frequency response of your stereo, for example, from 20 Hz up to 20 kHz in 31 third-octave bands. $595. Eventide Clockworks, 265 W. 54th St., New York, N.Y. 10019.

Pocket computer
It’s not a scientific calculator with attachments—it’s a portable computer, complete with alphanumeric readout. HP- 41C from Hewlett Packard accepts 400 lines of programming (2000, with plug-in memory), works with thermal printer and magnetic-card reader. Basic price: $295.

Super security
Add Comp-U-Lock to your door and you’d better remember the right combination to get in—there are 10,000 possibilities. The electronic system accepts four levels of security, to let in only those you wish, when you wish. ESP Systems, 28189 Kehrig Dr., Mt. Clemens, Mich. 48045; $129.95.

Electronics for Dummies

Or, “Oh for simpler days.”

When I was 8, I had a big brother for a very brief time. He was 14, and awesome in the 1950’s “Homer Price” sort of way. He built his own ham radio equipment, had all the soldering tools and an oscilloscope, and had a cool slingshot, and did really neat things at Hallowe’en, and I worshiped him. I regret sincerely that that particular domestic situation didn’t last.

But it was thinking about radios that got me going.

This image appeared over at Teresa Burritt’s Frog Blog, and I got all misty. I remember looking at all of brother’s electronic bits and pieces, and was fascinated by the pretty stripes on the resistors – at 8, I would not have been able to grasp the concepts of resistance, nor appreciate the mnemonic power of  “Bad Boys Rape Our Good Girls But Violet Gives Willingly”. Then a career got in the way, and then technology exploded by several orders of magnitude, and now I’d be about as useful repairing a circuit board as an Australopithecus with a Rolls-Royce jet engine.

But there’s something about going back to basics.

When my son was 12 or thereabouts, a “build your own radio” project happened. I don’t’ recall if he asked me, or I did it just to show him how it was done, or it was some scout thing or other – but a radio got built out of some junk, and it worked.

This was pretty much the design. A toilet paper roll, some copper wire, a headset, a germanium diode, and some assorted junk from around the house, and we were able to listen to KSL and some other local AM stations. I don’t even know if ours had a condenser on it, and I couldn’t tell you why it would be needed or not – I’m still that ignorant.

Life is full of choices, and every choice has prices and benefits. There are so many things on my bucket list, I don’t know if I’ll ever get to all of them. But understanding enough about electronics to be able to do repair work on my little Conn Theaterette organ is one of them.

This one’s not mine, but it looks just the same. All component parts, tubes, you name it. With the spec sheets and my trusty voltmeter, I should be able to keep the thing in top running condition… if I only understood the basics. Which I don’t. Not having studied my Agrippa. Hey, Macarena! Wait, there goes the ADD thing again…

But the point is, I could still learn. Nowadays, circuit boards and electronic parts are so cheap to manufacture that nobody bothers to repair things any more – you just throw it away, and buy a new one. But the principles on which they are built are no different. This voltage in, that voltage out – watts, ohms, condensers, capacitors – they’re all still there, just tiny. And, there are things out there to help.

While things like this are still to be had on eBay,

I think a kit like this would be a good place to start,

along with something like this:

And the parts are out there. With audiophiles becoming more and more numerous, the manufacture of vintage tubes has experienced a resurgence. Folks like me may never be able to tell the difference, but there are people who swear by component sound over microcircuitry, just like some folks will never give up their vinyl.

So hope is not lost. I’ve got too much on my plate now to think about it, but this blog entry will be a good reminder for me when things calm down a little.

The Old Wolf has spoken.